View Filing Data

Print Document View Excel Document

Document And Entity Information - USD ($)	12 Months Ended
Document And Entity Information - USD ($)	Dec. 31, 2018	Feb. 25, 2019	Jun. 29, 2018
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	ACIW
Entity Registrant Name	ACI WORLDWIDE, INC.
Entity Central Index Key	0000935036
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		116,143,338
Entity Public Float			$ 2,181,473,639
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 148,502	$ 69,710
Receivables, net of allowances of $3,912 and $4,799, respectively	348,182	262,845
Recoverable income taxes	6,686	7,921
Prepaid expenses	23,277	23,219
Other current assets	39,830	58,126
Total current assets	566,477	421,821
Noncurrent assets
Accrued receivables, net	189,010
Property and equipment, net	72,729	80,228
Software, net	137,228	155,386
Goodwill	909,691	909,691
Intangible assets, net	168,127	191,281
Deferred income taxes, net	27,048	66,749
Other noncurrent assets	52,145	36,483
TOTAL ASSETS	2,122,455	1,861,639
Current liabilities
Accounts payable	39,602	34,718
Employee compensation	38,115	48,933
Current portion of long-term debt	20,767	17,786
Deferred revenue	104,843	107,543
Income taxes payable	5,239	9,898
Other current liabilities	88,054	102,904
Total current liabilities	296,620	321,782
Noncurrent liabilities
Deferred revenue	51,292	51,967
Long-term debt	650,989	667,943
Deferred income taxes, net	31,715	16,910
Other noncurrent liabilities	43,608	38,440
Total liabilities	1,074,224	1,097,042
Commitments and contingencies (Note 14)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued at December 31, 2018 and 2017
Common stock; $0.005 par value; 280,000,000 shares authorized; 140,525,055 shares issued at December 31, 2018 and 2017	702	702
Additional paid-in capital	632,235	610,345
Retained earnings	863,768	550,866
Treasury stock, at cost, 24,401,694 and 23,428,324 shares at December 31, 2018 and 2017, respectively	(355,857)	(319,960)
Accumulated other comprehensive loss	(92,617)	(77,356)
Total stockholders' equity	1,048,231	764,597
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,122,455	$ 1,861,639

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Receivables, allowances	$ 3,912	$ 4,799
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.005	$ 0.005
Common stock, shares authorized	280,000,000	280,000,000
Common stock, shares issued	140,525,055	140,525,055
Treasury stock, shares	24,401,694	23,428,324

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Revenues

Total revenues

$ 1,009,780

$ 1,024,191

$ 1,005,701

Operating expenses

Cost of revenue

^[1]

430,351

452,286

444,914

Research and development

143,630

136,921

169,900

Selling and marketing

117,881

107,885

118,082

General and administrative

107,422

153,032

^[2]

113,617

Gain on sale of CFS assets

(151,463)

Depreciation and amortization

84,585

89,427

89,521

Total operating expenses

883,869

939,551

784,571

Operating income (loss)

125,911

84,640

221,130

Other income (expense)

Interest expense

(41,530)

(39,013)

(40,184)

Interest income

11,142

564

530

Other, net

(3,724)

(2,619)

4,105

Total other income (expense)

(34,112)

(41,068)

(35,549)

Income before income taxes

91,799

43,572

185,581

Income tax expense

22,878

38,437

56,046

Net income

$ 68,921

$ 5,135

$ 129,535

Earnings per common share

Basic

$ 0.59

$ 0.04

$ 1.10

Diluted

$ 0.59

$ 0.04

$ 1.09

Weighted average common shares outstanding

Basic

116,057

118,059

117,533

Diluted

117,632

119,444

118,847

Software as a service and platform as a service [Member]

Revenues

Total revenues

$ 433,025

$ 425,572

$ 411,289

License [Member]

Revenues

Total revenues

280,556

293,124

273,466

Maintenance [Member]

Revenues

Total revenues

219,145

222,071

233,476

Services [Member]

Revenues

Total revenues

$ 77,054

$ 83,424

$ 87,470

[1]	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.
[2]	General and administrative expenses in the second quarter includes the BHMI judgment.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 68,921	$ 5,135	$ 129,535
Other comprehensive income (loss):
Foreign currency translation adjustments, net of income taxes	(15,261)	16,744	(22,524)
Total other comprehensive income (loss):	(15,261)	16,744	(22,524)
Comprehensive income	$ 53,660	$ 21,879	$ 107,011

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2015	$ 654,400	$ 702	$ 561,379	$ 416,851	$ (252,956)	$ (71,576)
Net income	129,535			129,535
Other comprehensive income (loss)	(22,524)					(22,524)
Stock-based compensation	43,613		43,613
Shares issued and forfeited, net, under stock plans including income tax benefits	13,056		(5,204)		18,260
Repurchase of common stock	(60,089)				(60,089)
Repurchase of restricted stock for tax withholdings	(2,975)				(2,975)
Cumulative effect of accounting change	(99)		556	(655)
Ending balance at Dec. 31, 2016	754,917	702	600,344	545,731	(297,760)	(94,100)
Net income	5,135			5,135
Other comprehensive income (loss)	16,744					16,744
Stock-based compensation	13,683		13,683
Shares issued and forfeited, net, under stock plans including income tax benefits	16,816		(3,682)		20,498
Repurchase of common stock	(37,387)				(37,387)
Repurchase of restricted stock for tax withholdings	(5,311)				(5,311)
Ending balance at Dec. 31, 2017	764,597	702	610,345	550,866	(319,960)	(77,356)
Net income	68,921			68,921
Other comprehensive income (loss)	(15,261)					(15,261)
Stock-based compensation	20,360		20,360
Shares issued and forfeited, net, under stock plans including income tax benefits	22,748		1,530		21,218
Repurchase of common stock	(54,527)				(54,527)
Repurchase of restricted stock for tax withholdings	(2,588)				(2,588)
Cumulative effect of accounting change	243,981			243,981
Ending balance at Dec. 31, 2018	$ 1,048,231	$ 702	$ 632,235	$ 863,768	$ (355,857)	$ (92,617)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - shares	12 Months Ended			76 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Repurchase of common stock, shares	2,346,427	1,653,573	3,020,926	44,129,393

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income	$ 68,921	$ 5,135	$ 129,535
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	23,805	24,871	22,584
Amortization	73,545	77,353	80,870
Amortization of deferred debt issuance costs	4,637	4,286	5,567
Deferred income taxes	(5,734)	21,660	17,702
Stock-based compensation expense	20,360	13,683	43,613
Gain on sale of CFS assets			(151,463)
Other	2,007	435	806
Changes in operating assets and liabilities, net of impact of acquisitions:
Receivables	(14,760)	(8,243)	(76,460)
Accounts payable	5,766	(1,700)	(13,920)
Accrued employee compensation	(9,684)	94	18,060
Current income taxes	(5,115)	(4,227)	14,510
Deferred revenue	14,219	439	3,015
Other current and noncurrent assets and liabilities	5,965	12,411	5,411
Net cash flows from operating activities	183,932	146,197	99,830
Cash flows from investing activities:
Purchases of property and equipment	(18,265)	(25,717)	(40,812)
Purchases of software and distribution rights	(25,628)	(28,697)	(22,268)
Proceeds from sale of CFS assets			199,481
Acquisition of businesses, net of cash acquired			232
Other	(1,467)		(7,000)
Net cash flows from investing activities	(45,360)	(54,414)	129,633
Cash flows from financing activities:
Proceeds from issuance of common stock	3,098	2,958	2,987
Proceeds from exercises of stock options	19,674	13,872	9,325
Repurchase of restricted stock for tax withholdings	(2,588)	(5,311)	(2,975)
Repurchases of common stock	(54,527)	(37,387)	(60,089)
Proceeds from senior notes	400,000
Redemption of senior notes	(300,000)
Proceeds from revolving credit facility	109,000	67,000	76,000
Repayments of revolving credit facility	(111,000)	(153,000)	(166,000)
Proceeds from term portion of credit agreement		415,000
Repayments of term portion of credit agreement	(109,289)	(386,040)	(95,293)
Payment for debt issuance costs	(7,319)	(5,340)	(655)
Payments on other debt and capital leases	(4,753)	(9,900)	(14,376)
Net cash flows from financing activities	(57,704)	(98,148)	(251,076)
Effect of exchange rate fluctuations on cash	(2,076)	322	(4,873)
Net increase (decrease) in cash and cash equivalents	78,792	(6,043)	(26,486)
Cash and cash equivalents, beginning of period	69,710	75,753	102,239
Cash and cash equivalents, end of period	148,502	69,710	75,753
Supplemental cash flow information
Income taxes paid, net	32,205	37,817	19,081
Interest paid	$ 35,300	$ 34,976	$ 35,053

Nature of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Nature of Business and Summary of Significant Accounting Policies

Nature of Business

ACI Worldwide, Inc., a Delaware corporation, and its subsidiaries (collectively referred to as “ACI” or the “Company”) develop, market, install, and support a broad line of software products and services primarily focused on facilitating electronic payments. In addition to its own products, the Company distributes or acts as a sales agent for software developed by third parties. These products and services are used principally by banks, financial intermediaries, merchants and corporates, both in domestic and international markets.

Consolidated Financial Statements

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.

Capital Stock

The Company’s outstanding capital stock consists of a single class of common stock. Each share of common stock is entitled to one vote for each matter subject to a stockholder’s vote and to dividends, if and when declared by the board of directors (the “board”).

Use of Estimates

The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents

The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company’s cash and cash equivalents includes holdings in checking, savings, money market, and overnight sweep accounts, all of which have daily maturities, as well as time deposits with maturities of three months or less at the date of purchase. The carrying amounts of cash and cash equivalents on the consolidated balance sheets approximate fair value.

Other Current Assets and Other Current Liabilities

	December 31,
(in thousands)	2018		2017
Settlement deposits	$	23,651	$	22,282
Settlement receivables		8,605		30,063
Other		7,574		5,781
Total other current assets	$	39,830	$	58,126

	December 31,
(in thousands)	2018		2017
Settlement payables	$	31,605	$	48,953
Accrued interest		8,407		7,291
Vendor financed licenses		3,551		1,862
Royalties payable		11,318		9,264
Other		33,173		35,534
Total other current liabilities	$	88,054	$	102,904

Individuals and businesses settle their obligations to the Company’s various clients, primarily utility and other public-sector clients, using credit or debit cards or via automated clearing house (“ACH”) payments. The Company creates a receivable for the amount due from the credit or debit card company and an offsetting payable to the client. Once confirmation is received that the funds have been received, the Company settles the obligation to the client. Due to timing, in some instances, the Company may receive the funds into bank accounts controlled by and in the Company’s name that are not disbursed to its clients by the end of the day resulting in a settlement deposit on the Company’s books.

Off Balance Sheet Settlement Accounts

The Company also enters into agreements with certain clients to process payment funds on their behalf. When an ACH or automated teller machine network payment transaction is processed, a transaction is initiated to withdraw funds from the designated source account and deposit them into a settlement account, which is a trust account maintained for the benefit of the Company’s clients. A simultaneous transaction is initiated to transfer funds from the settlement account to the intended destination account. These “back to back” transactions are designed to settle at the same time, usually overnight, such that the Company receives the funds from the source at the same time as it sends the funds to their destination. However, due to the transactions being with various financial institutions there may be timing differences that result in float balances. These funds are maintained in accounts for the benefit of the client which is separate from the Company’s corporate assets. As the Company does not take ownership of the funds, the settlement accounts are not included in the Company’s balance sheet. The Company is entitled to interest earned on the fund balances. The collection of interest on these settlement accounts is considered in the Company’s determination of its fee structure for clients and represents a portion of the payment for services performed by the Company. The amount of settlement funds as of December 31, 2018 and 2017, were $256.5 million and $238.9 million, respectively.

Property and Equipment

Property and equipment are stated at cost. Depreciation of these assets is generally computed using the straight-line method over their estimated useful lives based on asset class.

As of December 31, 2018 and 2017, net property and equipment consisted of the following (in thousands):

	Useful Lives		2018			2017
Computer and office equipment	3 - 5 years	$	129,359		$	123,804
Leasehold improvements	Lesser of useful life of improvement or remaining life of lease		32,096			32,364
Furniture and fixtures	7 years		12,500			12,158
Building and improvements	7 - 30 years		14,381			12,651
Land	Non depreciable		1,785			1,785
			190,121			182,762
Less: accumulated depreciation			(117,392	)		(102,534	)
Property and equipment, net		$	72,729		$	80,228

Software

Software may be for internal use or available for sale. Costs related to certain software, which is available for sale, are capitalized in accordance with Accounting Standards Codification (“ASC”) 985-20,

Costs of Software to be Sold, Leased, or Marketed

, when the resulting product reaches technological feasibility. The Company generally determines technological feasibility when it has a detailed program design that takes product function, feature and technical requirements to their most detailed, logical form and is ready for coding. The Company does not typically capitalize costs related to software available for sale as technological feasibility generally coincides with general availability of the software. The Company capitalizes the costs of software developed or obtained for internal use in accordance with ASC 350-40,

Internal Use Software

. The Company expenses all costs incurred during the preliminary project stage of its development and capitalizes the costs incurred during the application development stage. Costs incurred relating to upgrades and enhancements to the software are capitalized if it is determined that these upgrades or enhancements add additional functionality to the software. Costs incurred during the application development stage include purchased software licenses, implementation costs, consulting costs, and payroll-related costs for projects that qualify for capitalization. All other costs, primarily related to maintenance and minor software fixes, are expensed as incurred.

Amortization of software costs to be sold or marketed externally is determined on a product-by-product basis and begins when the product is available for licensing to customers. The annual amortization shall be the greater of the amount computed using (a) the ratio of current gross revenues for a product to the total of current and anticipated future gross revenues for that product or (b) the straight-line method over the remaining estimated economic life of the product, including the period being reported on. Due to competitive pressures, it may be possible that the estimates of anticipated future gross revenue or remaining estimated economic life of the software product will be reduced significantly. As a result, the carrying amount of the software product may be reduced accordingly. Amortization of internal-use software is generally computed using the straight-line method over estimated useful lives of three to ten years.

Business Combinations

The Company applies the provisions of ASC 805,

Business Combinations

, in the accounting for its acquisitions. It requires the Company to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. Goodwill as of the acquisition date is measured as the excess of consideration transferred and the net of the acquisition date fair values of the assets acquired and the liabilities assumed. While the Company uses its best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, its estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, it records adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our consolidated statements of operations.

Critical estimates in valuing certain intangible assets include but are not limited to future expected cash flows from customer relationships, covenants not to compete and acquired developed technologies, brand awareness and market position, as well as assumptions about the period of time the brand will continue to be used in our product portfolio, and discount rates. Management’s estimates of fair value are based upon assumptions believed to be reasonable, but which are inherently uncertain and unpredictable and, as a result, actual results may differ from estimates.

Other estimates associated with the accounting for acquisitions may change as additional information becomes available regarding the assets acquired and liabilities assumed.

Fair Value

ASC 820,

Fair Value Measurements and Disclosures

(“ASC 820”) defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. ASC 820 establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:

•

Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

•

Level 2 Inputs – Inputs other than quoted prices included in Level 1 that are observable for the asset or liability, either directly or indirectly. These might include quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (such as interest rates, volatilities, prepayment speeds, credit risks, etc.) or inputs that are derived principally from or corroborated by market data by correlation or other means.

•

Level 3 Inputs – Unobservable inputs for determining the fair values of assets or liabilities that reflect an entity’s own assumptions about the assumptions that market participants would use in pricing the assets or liabilities.

The fair value of the Company’s Credit Agreement approximates the carrying value due to the floating interest rate (Level 2 of the fair value hierarchy). The Company measures the fair value of its Senior Notes based on Level 2 inputs, which include quoted market prices and interest rate spreads of similar securities. The fair value of the Company’s 5.750% Senior Notes due 2026 (“2026 Notes”) was $395.0 million as of December 31, 2018. The fair value of the Company’s 6.375% Senior Notes due 2020 (“2020 Notes”) was $305.7 million as of December 31, 2017.

The fair values of cash and cash equivalents approximate the carrying values due to the short period of time to maturity (Level 2 of the fair value hierarchy).

Goodwill and Other Intangibles

In accordance with ASC 350,

Intangibles – Goodwill and Other

, the Company assesses goodwill for impairment annually during the fourth quarter of its fiscal year using October 1 balances or when there is evidence that events or changes in circumstances indicate that the carrying amount of the asset may not be recovered. The Company evaluates goodwill at the reporting unit level using the discounted cash flow valuation model and allocates goodwill to these reporting units using a relative fair value approach. During this assessment, management relies on a number of factors, including operating results, business plans, and anticipated future cash flows. The Company has identified its reportable segments, ACI On Premise and ACI On Demand, as the reporting units. As of December 31, 2018 and 2017, the Company’s goodwill of $909.7 million was allocated to its two reporting units, with $725.9 allocated to ACI On Premise and $183.8 million allocated to ACI On Demand.

The key assumptions used in the discounted cash flow valuation model include discount rates, growth rates, cash flow projections and terminal value rates. Discount rates, growth rates, and cash flow projections are the most sensitive and susceptible to change as they require significant management judgment. Discount rates are determined by using a weighted average cost of capital (“WACC”). The WACC considers market and industry data as well as company-specific risk factors. Operational management, considering industry and company-specific historical and projected data, develops growth rates and cash flow projections for each reporting unit. Terminal value rate determination follows common methodology of capturing the present value of perpetual cash flow estimates beyond the last projected period, assuming a constant WACC and low, long-term growth rates. If the recoverability test indicates potential impairment, the Company calculates an implied fair value of goodwill for the reporting unit. The implied fair value of goodwill is determined in a manner similar to how goodwill is calculated in a business combination. If the implied fair value of goodwill exceeds the carrying value of goodwill assigned to the reporting unit, there is no impairment. If the carrying value of goodwill assigned to a reporting unit exceeds the implied fair value of the goodwill, an impairment charge is recorded to write down the carrying value. The calculated fair value substantially exceeded the current carrying value for all reporting units for all periods.

Other intangible assets, which include customer relationships and trademarks and trade names, are amortized using the straight-line method over periods ranging from three years to 20 years. The Company reviews its other intangible assets for impairment whenever events or changes in circumstances indicate that the carrying amount may not be recoverable.

Impairment of Long-Lived Assets

The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of a long-lived asset group may not be recoverable. An impairment loss is recorded if the sum of the future cash flows expected to result from the use of the asset (undiscounted and without interest charges) is less than the carrying amount of the asset. The amount of the impairment charge is measured based upon the fair value of the asset group.

Treasury Stock

The Company accounts for shares of its common stock that are repurchased without intent to retire as treasury stock. Such shares are recorded at cost and reflected separately on the consolidated balance sheets as a reduction of stockholders’ equity. The Company issues shares of treasury stock upon exercise of stock options, issuance of restricted share awards and restricted share units, payment of earned performance shares, and for issuances of common stock pursuant to the Company’s employee stock purchase plan. For purposes of determining the cost of the treasury shares re-issued, the Company uses the average cost method.

Stock-Based Compensation Plans

In accordance with ASC 718,

Compensation – Stock Compensation

, the Company recognizes stock-based compensation expense for awards that are probable of vesting on a straight-line basis over the requisite service period of the award, which is generally the vesting term. Stock-based compensation expense is recorded in operating expenses depending on where the respective individual’s compensation is recorded. The Company generally utilizes the Black–Scholes option–pricing model to determine the fair value of stock options on the date of grant. To determine the grant date fair value of the supplemental stock options and total shareholder return awards (“TSRs”), a Monte Carlo simulation model was used.

The assumptions utilized in the Black-Scholes option-pricing and Monte Carlo simulation models, as well as the description of the plans the stock-based awards are granted under, are described in further detail in Note 11,

Stock-Based Compensation Plans

Translation of Foreign Currencies

The Company’s foreign subsidiaries typically use the local currency of the countries in which they are located as their functional currency. Their assets and liabilities are translated into U.S. dollars at the exchange rates in effect at the balance sheet date. Revenues and expenses are translated at the average exchange rates during the period. Translation gains and losses are reflected in the consolidated financial statements as a component of accumulated other comprehensive income (loss). Transaction gains and losses, including those related to intercompany accounts, that are not considered to be of a long-term investment nature are included in the determination of net income. Transaction gains and losses, including those related to intercompany accounts, that are considered to be of a long-term investment nature are reflected in the consolidated financial statements as a component of accumulated other comprehensive income (loss).

Income Taxes

The provision for income taxes is computed using the asset and liability method, under which deferred tax assets and liabilities are recognized for the expected future tax consequences of temporary differences between the financial reporting and tax bases of assets and liabilities. Deferred tax assets are reduced by a valuation allowance when it is more likely than not that some portion or all of the deferred tax assets will not be realized.

The Company periodically assesses its tax exposures and establishes, or adjusts, estimated unrecognized tax benefits for probable assessments by taxing authorities, including the Internal Revenue Service (“IRS”), and various foreign and state authorities. Such unrecognized tax benefits represent the estimated provision for income taxes expected to ultimately be paid.

New Accounting Standards Recently Adopted

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09,

Revenue from Contracts with Customers

(codified as “ASC 606”) as well as other clarifications and technical guidance related to this new revenue standard, including ASC 340-40,

Other Assets and Deferred Costs – Contracts with Customers

. ASC 606 superseded the revenue recognition requirements in ASC 605,

Revenue Recognition

, and most industry-specific guidance. The Company adopted ASC 606 and ASC 340-40 on January 1, 2018 (the effective date) using the modified retrospective transition method which required an adjustment to retained earnings for the cumulative effect of applying ASC 606 to active contracts as of the adoption date. For active contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating the transaction price in accordance with the practical expedient permitted under ASC 606. The cumulative effect of applying ASC 606 to active contracts as of the adoption date was an increase to retained earnings of $244.0 million.

In August 2016, the FASB issued ASU 2016-15,

Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments

, an update that addresses how certain cash receipts and cash payments are presented and classified in the statement of cash flows. Among the cash flow matters addressed in the update are payments for costs related to debt prepayments or extinguishments, payments related to settlement of certain types of debt instruments, payments of contingent consideration made after a business combination, proceeds from insurance claims and corporate-owned life insurance policies, and distributions received from equity method investees, among others. The amendments are applied using a retrospective transition method to each period presented, unless impracticable for specific cash flow matters, in which case the amendments would be applied prospectively as of the earliest date practicable. The Company adopted ASU 2016-15 as of January 1, 2018. The adoption of ASU 2016-15 was not material to the consolidated statement of cash flows.

In October 2016, the FASB issued ASU 2016-16,

Intra-Entity Transfers of Assets Other than Inventory

, to simplify the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Previously, U.S. GAAP prohibited the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition was an exception to the principle of comprehensive recognition of current and deferred income taxes in U.S. GAAP. The limited amount of authoritative guidance about the exception led to diversity in practice and is a source of complexity in financial reporting, particularly for an intra-entity transfer of intellectual property. Under the amendments of ASU 2016-16, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, this amendment eliminates the exception for an intra-entity transfer of an asset other than inventory. The amendments to this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company adopted ASU 2016-16 as of January 1, 2018. The adoption of ASU 2016-16 had no impact on the consolidated balance sheet, results of operations, or statement of cash flows.

In June 2018, the FASB issued ASU 2018-07,

Improvements to Nonemployee Share-Based Payment Accounting,

as a part of its simplification initiative. ASU 2018-07 expands the scope of ASC 718,

Compensation – Stock Compensation,

to include share-based payment transactions for acquiring goods and services from nonemployees. The Company elected to early adopt ASU 2018-07, the adoption of which was not material to the consolidated balance sheet, results of operations, or statement of cash flows.

In August 2018, the FASB issued ASU 2018-05,

Intangibles – Goodwill and

Other – Internal-Use

Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

(“ASU 2018-05”). The purpose of the update was to reduce potential diversity in practice and provide specific guidance on how to account for implementation costs incurred in a cloud computing arrangement. ASU 2018-05 applies the same guidance in ASC 350-40, Intangibles – Goodwill and Other – Internal-Use

Software

, to determine implementation costs to capitalize versus costs that are to be expensed as incurred. This ASU will be effective for fiscal years beginning after December 15, 2019, with early adoption permitted. The Company elected to early adopt ASU 2018-05 during the year ended December 31, 2018. The adoption had no impact on the consolidated balance sheet, results of operations, or statement of cash flows.

Recently Issued Accounting Standards Not Yet Effective

In February 2016, the FASB issued ASU 2016-02,

Leases

(codified as “ASC 842”). ASC 842 requires lessees to recognize right-of-use (“ROU”) assets and lease liabilities on the balance sheet for all leases with lease terms of more than 12 months. In addition, this standard requires both lessees and lessors to disclose certain key information about lease transactions. The Company will adopt the standard effective January 1, 2019 (the effective date) using the optional transition method to not apply the new lease standard in the comparative periods presented and will elect the ‘practical expedient package’, which permits the Company to not reassess prior conclusions about lease identification, lease classification, and initial direct costs. ASC 842 also provides practical expedients for the Company’s ongoing accounting. We currently expect to elect the short-term lease recognition exemption for all leases that qualify. As such, for those leases that qualify, we will not recognize ROU assets or lease liabilities as part of the transition adjustment or in the future. The Company also expects to elect the practical expedient to not separate lease and non-lease components for all our leases.

The Company established a cross-functional project team to assess implementing changes to its systems, processes, and controls, in conjunction with a comprehensive review of existing lease agreements. To determine ACI’s lease population, the team reviewed leases included in the current ASC 840 minimum lease payments disclosure as well as supplier contracts, including cloud computing, print, mail services and colocation agreements for potential embedded leases. The Company has determined that the adoption of ASC 842 primarily relates to its real estate leases for office and datacenter facilities.

The Company expects the adoption of ASC 842 will have a material impact on its consolidated balance sheet as its rights and obligations from its existing operating leases will be recognized on the balance sheet as assets and liabilities. As of December 31, 2018, the Company’s undiscounted minimum commitments under noncancelable operating leases was

approximately $77.6 million. The Company does not expect the adoption of ASC 842 to have a material effect on its results of operations, stockholders’ equity, or statement of cash flows.

Based on currently available information, the Company expects to recognize operating lease liabilities and ROU assets of $65 million – $75 million and $60 million – $70 million, respectively

The expected operating lease liabilities were calculated based on the present value of the remaining minimum lease payments for existing operating leases as of December 31, 2018. The expected ROU assets will reflect adjustments for derecognition of deferred leasing incentives and prepaid rents

In February 2018, the FASB issued ASU 2018-02,

Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

. This ASU provides an option to reclassify stranded tax effects within accumulated other comprehensive income (“AOCI”) to retained earnings in each period in which the effect of the change in the U.S. federal corporate income tax rate in the 2017 U.S. Tax Cuts and Jobs Act (or portion thereof) is recorded. This ASU requires disclosure of a description of the accounting policy for releasing income tax effects from AOCI; whether election is made to reclassify the stranded income tax effects from the 2017 U.S. Tax Cuts and Jobs Act; and information about the income tax effects that are reclassified. This ASU is effective for annual and interim periods beginning after December 15, 2018. The Company does not expect the adoption of ASU 2018-02 to have a material effect on its consolidated balance sheet, results of operations, or statement

of cash flows.

Revenue

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Revenue

2. Revenue

Revenue Recognition

In accordance with ASC 606, revenue is recognized upon transfer of control of promised products and/or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products and services. Revenue is recognized net of any taxes collected from customers and subsequently remitted to governmental authorities.

Contract Combination.

The Company may execute more than one contract or agreement with a single customer. The separate contracts or agreements may be viewed as one combined arrangement or separate agreements for revenue recognition purposes. In order to reach appropriate conclusions regarding whether such agreements should be combined, the Company evaluates whether the agreements were negotiated as a package with a single commercial objective, whether the amount of consideration to be paid in one agreement depends on the price and/or performance of another agreement, or whether the product(s) or services promised in the agreements represent a single performance obligation. The conclusions reached can impact the allocation of the transaction price to each performance obligation and the timing of revenue recognition related to those arrangements.

Software as a Service (“SaaS”) and Platform as a Service (“PaaS”) Arrangements.

The Company’s SaaS-based and PaaS-based arrangements, including implementation, support and other services, represent a single promise to provide continuous access (i.e. a stand-ready performance obligation) to its software solutions and their processing capabilities in the form of a service through one of the Company’s data centers. As each day of providing access to the software solution(s) is substantially the same and the customer simultaneously receives and consumes the benefits as access is provided, the Company’s single promise under its SaaS-based and PaaS-based arrangements is comprised of a series of distinct service periods. The Company’s SaaS-based and PaaS-based arrangements may include fixed consideration, variable consideration, or a combination of the two. Fixed consideration is recognized over the term of the arrangement or longer if the fixed consideration relates to a material right. A material right would be a separate performance obligation. The Company estimates the standalone selling price for a material right by reference to the services expected to be provided and the corresponding expected consideration. Variable consideration in these arrangements is typically a function of transaction volume or another usage-based measure. Depending upon the structure of a particular arrangement, the Company: (1) allocates the variable amount to each distinct service period within the series and recognizes revenue as each distinct service period is performed (i.e. direct allocation), (2) estimates total variable consideration at contract inception (giving consideration to any constraints that may apply and updating the estimates as new information becomes available) and recognizes the total transaction price over the period to which it relates, or (3) applies the ‘right to invoice’ practical expedient and recognizes revenue based on the amount invoiced to the customer during the period.

License Arrangements.

The Company’s software license arrangements provide the customer with the right to use functional intellectual property (as it exists at the point in time at which the license is granted) for the duration of the contract term. Implementation, support, and other services are typically considered distinct performance obligations when sold with a software license unless these services are determined to significantly modify the software.

Payment terms for the Company’s software license arrangements generally include fixed license and capacity fees that are payable up front or over time. These arrangements may also include incremental usage-based fees that are payable when the customer exceeds its contracted license capacity limits. The Company accounts for capacity overages as a usage-based royalty that is recognized when the usage occurs.

When a software license arrangement contains payment terms that are extended beyond one year, a significant financing component may exist. The significant financing component is calculated as the difference between the stated value and present value of the software license fees and is recognized as interest income over the extended payment period. The total fixed software license fee net of the significant financing component is recognized as revenue at the point in time when the software is transferred to the customer.

For those software license arrangements that include customer-specific acceptance provisions, such provisions are generally presumed to be substantive and the Company does not recognize revenue until the earlier of the receipt of a written customer acceptance, objective demonstration that the delivered product meets the customer-specific acceptance criteria, or the expiration of the acceptance period. The Company recognizes revenues on such arrangements upon the earlier of receipt of written acceptance or the first production use of the software by the customer.

For software license arrangements in which the Company acts as a distributor of another company’s product, and in certain circumstances, modifies or enhances the product, revenues are recorded on a gross basis. These include arrangements in which the Company takes control of the products and is responsible for providing the product or service. For software license arrangements in which the Company acts as a sales agent for another company’s product, revenues are recorded on a net basis. These include arrangements in which the Company does not take control of products and is not responsible for providing the product or service.

For software license arrangements in which the Company utilizes a third-party distributor or sales agent, the Company recognizes revenue upon transfer of control of the software license(s) to the third-party distributor or sales agent.

The Company’s software license arrangements typically provide the customer with a standard

-day assurance-type warranty.

These warranties do not represent an additional performance obligation as services beyond assuring that the software license complies with agreed-upon specifications are not provided.

Software license arrangements typically include an initial post contract customer support (maintenance or “PCS”) term of one year with subsequent renewals for additional years within the initial license period. The Company’s promise to those customers who elect to purchase PCS represents a stand-ready performance obligation that is distinct from the license performance obligation and recognized over the PCS term.

The Company also provides various professional services to customers with software licenses. These include project management, software implementation, and software modification services. Revenues from arrangements to provide professional services are generally distinct from the other promises in the contract(s) and are recognized as the related services are performed. Consideration payable under these arrangements is either fixed fee or on a time-and-materials basis, which represents variable consideration that must be estimated using the most likely amount based on the range of hours expected to be incurred in providing the services.

The Company estimates the standalone selling price (“SSP”) for maintenance and professional services based on observable standalone sales. The Company applies the residual approach to estimate the SSP for software licenses.

Refer to Note 10,

Segment Information

, for further details, including disaggregation of revenue based on primary solution category and geographic location.

Significant Judgments

The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information.

The Company also applies judgment in determining the term of an arrangement when early termination rights are provided to the customer.

The Company’s software license arrangements with its customers often include multiple promises to transfer licensed software products and services. Determining whether the products and/or services are distinct performance obligations that should be accounted for separately may require significant judgment.

The Company’s SaaS and PaaS arrangements may include variable consideration in the form of usage-based fees. If the arrangement that includes variable consideration in the form of usage-based fees does not meet the allocation exception for variable consideration, the Company estimates the amount of variable consideration at the outset of the arrangement using either the expected value or most likely amount method, depending on the specifics of each arrangement. These estimates are constrained to the extent that it is probable that a significant reversal of incremental revenue will not occur and are updated each reporting period as additional information becomes available.

Judgment is used in determining: (1) whether the financing component in a software license agreement is significant and, if so, (2) the discount rate used in calculating the significant financing component. The Company assesses the significance of the financing component based on the ratio of license fees paid over time to total license fees. If determined to be significant, the financing component is calculated using a rate that discounts the license fees to the cash selling price.

Judgment is also used in assessing whether the extension of payment terms in a software license arrangement results in variable consideration and, if so, the amount to be included in the transaction price. The Company applies the portfolio approach to estimating the amount of variable consideration in these arrangements using the most likely amount method that is based on the Company’s historical collection experience under similar arrangements.

Significant judgment is required to determine the SSP for each performance obligation, the amount allocated to each performance obligation and whether it depicts the amount that the Company expects to receive in exchange for the related product and/or service. As the selling prices of the Company’s software licenses are highly variable, the Company estimates SSP of its software licenses using the residual approach when the software license is sold with other services and observable SSPs exist for the other services. The Company uses a range of amounts to estimate SSP for maintenance and services. These ranges are based on standalone sales and vary based on the type of service and geographic region. If the SSP of a performance obligation is not directly observable, the Company will maximize observable inputs to determine its SSP.

Contract Balances

Timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an accrued receivable when revenue is recognized prior to invoicing and the Company’s right to consideration only requires the passage of time, or deferred revenue when revenue is recognized subsequent to invoicing.

Total receivables represent amounts billed and amounts earned that are to be billed in the future (i.e., accrued receivables). Included in accrued receivables are services and SaaS and PaaS revenues earned in the current period but billed in the following period and amounts due under multi-year software license arrangements with extended payment terms for which the Company has an unconditional right to invoice and receive payment subsequent to invoicing.

	December 31,
(in thousands)	2018			2017
Billed receivables	$	239,275		$	240,137
Allowance for doubtful accounts		(3,912	)		(4,799	)
Billed receivables, net	$	235,363		$	235,338
Accrued receivables		336,858			27,507
Significant financing component		(35,029	)		—
Total accrued receivables, net		301,829			27,507
Less current accrued receivables		123,053			27,507
Less current significant financing component		(10,234	)		—
Total long-term accrued receivables, net	$	189,010		$	—
Total receivables, net	$	537,192		$	262,845

No customer accounted for more than 10% of the Company’s consolidated receivables balance as of December 31, 2018 and 2017.

The Company maintains a general allowance for doubtful accounts based on historical experience, along with additional customer -specific allowances. The Company regularly monitors credit risk exposures in consolidated receivables. In estimating the necessary level of our allowance for doubtful accounts, management considers the aging of accounts receivable, the creditworthiness of customers, economic conditions within the customer’s industry, and general economic conditions, among other factors.

The following reflects activity in the Company’s allowance for doubtful accounts receivable for the periods indicated (in thousands):

	Years Ended December 31,
	2018			2017			2016
Balance, beginning of period	$	(4,799	)	$	(3,873	)	$	(5,045	)
Provision increase		(1,505	)		(2,086	)		(1,595	)
Amounts written off, net of recoveries		2,269			1,305			2,551
Foreign currency translation adjustments and other		123			(145	)		216
Balance, end of period	$	(3,912	)	$	(4,799	)	$	(3,873	)

Provision increases recorded in general and administrative expense during the years

ended December 31, 2018, 2017, and 2016,

reflect increases in the allowance for doubtful accounts based upon collection experience in the geographic regions in which the Company conducts business, net of collection of customer-specific receivables that were previously reserved for as doubtful of collection.

Deferred revenue includes amounts due or received from customers for software licenses, maintenance, services, and/or SaaS and PaaS services in advance of recording the related revenue.

Changes in deferred revenue were as follows (in thousands):

	Deferred Revenue
Balance, January 1, 2018	$	145,344
Deferral of revenue		215,188
Recognition of deferred revenue		(200,061	)
Foreign currency translation		(4,336	)
Balance, December 31, 2018	$	156,135

Revenue allocated to remaining performance obligations represents contracted revenue that will be recognized in future periods, which is comprised of deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. This does not include:

•

Revenue that will be recognized in future periods from capacity overages that are accounted for as a usage-based royalty.

•

SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the ‘right to invoice’ practical expedient.

•

SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the direct allocation method.

Revenue allocated to remaining performance obligations was $666.4 million as of December 31, 2018, of which the Company expects to recognize approximately 48% over the next 12 months and the remainder thereafter.

During the year ended December 31, 2018, the revenue recognized by the Company from performance obligations satisfied in previous periods was $29.6 million.

Costs to Obtain and Fulfill a Contract

The Company accounts for costs to obtain and fulfill its contracts in accordance with ASC 340-40.

The Company capitalizes certain of its sales commissions that meet the definition of incremental costs of obtaining a contract and for which the amortization period is greater than one year. The costs associated with those sales commissions is capitalized during the period in which the Company becomes obligated to pay the commissions and is amortized over the period in which the related products or services are transferred to the customer. As of December 31, 2018, $1.3 million and $11.7 million of these costs are included in other current assets and other non-current assets, respectively, on the consolidated balance sheets. During the year ended December 31, 2018, the Company recognized $8.4 million of sales commission expense related to the amortization of these costs, which is included in selling and marketing expense.

The Company capitalizes costs incurred to fulfill its contracts that: (1) relate directly to the arrangement, (2) are expected to generate resources that will be used to satisfy the Company’s performance obligation under the arrangement, and (3) are expected to be recovered through revenue generated under the arrangement. Contract fulfillment costs are expensed as the Company transfers the related services to the customer. As of December 31, 2018, $0.2 million and $12.6 million of these costs are included in other current assets and other non-current assets, respectively, on the consolidated balance sheets. The amounts capitalized primarily relate to direct costs that enhance resources under the Company’s SaaS and PaaS arrangements. During the year ended December 31, 2018, the Company recognized $4.7 million of expense related to the amortization of these costs, which is included in cost of revenue.

Financial Statement Effect of Applying ASC 606

As the modified retrospective transition method does not result in recast of the prior year financial statements, ASC 606 requires the Company to provide additional disclosures for the amount by which each financial statement line item is affected by adoption of the standard and explanation of the reasons for significant changes.

The financial statement line items affected by adoption of ASC 606 are as follows (in thousands):

	December 31, 2018
	As Reported		Without Application of ASC 606		Effect of Change Higher / (Lower)
Assets
Receivables, net of allowances	$	348,182	$	272,409	$	75,773
Recoverable income taxes		6,686		13,539		(6,853	)
Prepaid expenses		23,277		24,018		(741	)
Other current assets		39,830		38,717		1,113
Accrued receivables, net		189,010		—		189,010
Deferred income taxes, net		27,048		61,554		(34,506	)
Other noncurrent assets		52,145		41,590		10,555
Liabilities
Deferred revenue		104,843		134,565		(29,722	)
Income taxes payable		5,239		5,472		(233	)
Other current liabilities		88,054		88,288		(234	)
Deferred income taxes, net		31,715		10,178		21,537
Stockholders’ equity
Total stockholders’ equity		1,048,231		805,228		243,003

	Year Ended December 31, 2018
	As Reported			Without Application of ASC 606			Effect of Change Higher / (Lower)
Revenues
Software as a service and platform as a service	$	433,025		$	432,095		$	930
License		280,556			281,355			(799	)
Maintenance		219,145			221,189			(2,044	)
Services		77,054			77,595			(541	)
Operating expenses
Selling and marketing		117,881			110,417			7,464
Other income (expense)
Interest income		11,142			831			10,311
Other, net		(3,724	)		(3,274	)		(450	)
Income tax provision
Income tax expense (benefit)		22,878			22,981			(103	)

The following summarizes the significant changes resulting from the adoption of ASC 606 compared to if the Company had continued to recognize revenues under ASC 985-605,

Revenue Recognition: Software

(ASC 605).

Receivables, Deferred Revenue, License and Maintenance Revenue, and Interest Income

The change in receivables, deferred revenue, license and maintenance revenue, and interest income is due to a change in the timing and the amount of recognition for software license revenues under ASC 606.

Under ASC 605, the Company recognized revenue upon delivery provided (i) there is persuasive evidence of an arrangement, (ii) collection of the fee is considered probable, and (iii) the fee is fixed or determinable. For software license arrangements in which a significant portion of the fee is due more than 12 months after delivery or when payment terms are significantly beyond the Company’s standard business practice, the license fee is deemed not fixed or determinable. For software license arrangements in which the fee is not considered fixed or determinable, the license is recognized as revenue as payments become due and payable, provided all other conditions for revenue recognition have been met.

License revenue under ASC 605 includes revenue from software license arrangements with extended payment terms for which the due and payable pattern of recognition was applied and revenue from renewals of software license arrangements in the period during which the renewal is signed. Under ASC 606, license revenue from these software license arrangements with extended payment terms is accelerated (i.e. upfront recognition) and adjusted for the effects of the financing component, if significant. The significant financing component in these software license arrangements is recognized as interest income over the extended payment period. As many of these software license arrangements were active as of the date the Company adopted ASC 606, the license fees are included in the Company’s cumulative adjustment to retained earnings. Under ASC 606, revenue for license renewals is recognized when the customer can begin to use and benefit from the license, which is generally at the commencement of the license renewal period.

Other Current Assets, Other Noncurrent Assets, and Selling and Marketing

Under ASC 606, certain of the Company’s sales commissions meet the definition of incremental costs of obtaining a contract. Accordingly, these costs are capitalized and the expense is recognized as the related goods or services are transferred to the customer. Prior to the adoption of ASC 606, the Company recognized sales commission expenses as they were incurred.

Deferred Income Taxes, Net

The change in deferred income taxes is primarily due to the deferred tax effects resulting from the adjustment to retained earnings for the cumulative effect of applying ASC 606 to active contracts as of the adoption date.

The adoption of ASC 606 had no impact in total on the Company’s cash flows from operations.

Divestiture

12 Months Ended

Dec. 31, 2018

Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]

Divestiture

3. Divestiture

Community Financial Services

On March 3, 2016, the Company completed the sale of its Community Financial Services (“CFS”) related assets and liabilities to Fiserv, Inc. (“Fiserv”) for $200.0 million. The sale of CFS, which was not strategic to the Company’s long-term strategy, is part of the Company’s ongoing efforts to expand as a provider of software products, SaaS-based solutions, and PaaS-based solutions facilitating real-time electronic and eCommerce payments for large banks, financial intermediaries, and merchants and corporates worldwide. The sale included employee agreements and customer contracts, as well as technology assets and intellectual property.

For the year ended December 31, 2016, the Company recognized a net after-tax gain of $93.4 million on the sale of assets to Fiserv. This gain includes final post-closing adjustments pursuant to the definitive transaction agreement of $0.5 million recognized during the year ended December 31, 2016.

The Company and Fiserv also entered into a Transition Services Agreement (“TSA”), whereby the Company continues to perform certain functions on Fiserv’s behalf during a migration period. The TSA is meant to reimburse the Company for direct costs incurred to provide such functions, which are no longer generating revenue for the Company.

Software and Other Intangible Assets

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Software and Other Intangible Assets

4. Software and Other Intangible Assets

At December 31, 2018, software net book value totaled $137.2 million, net of $252.2 million of accumulated amortization. Included in this net book value amount is software for resale of $27.5 million and software acquired or developed for internal use of $109.7 million.

At December 31, 2017, software net book value totaled $155.4 million, net of $230.7 million of accumulated amortization. Included in this net book value amount is software for resale of $40.9 million and software acquired or developed for internal use of $114.5 million.

Amortization of software for resale is computed using the greater of (a) the ratio of current revenues to total current and future revenues expected to be derived from the software or (b) the straight-line method over an estimated useful life of generally three to ten years. Software for resale amortization expense totaled $12.8 million during both the years ended December 31, 2018 and 2017, and totaled $13.9 million for the year ended December 31, 2016. These software amortization expense amounts are reflected in cost of revenue in the consolidated statements of operations.

Amortization of software for internal use is computed using the straight-line method over an estimated useful life of generally three to ten years. Software for internal use amortization expense recorded during the years ended December 31, 2018, 2017, and 2016, totaled $41.7 million, $45.2 million, and $45.7 million, respectively. These software amortization expense amounts are reflected in depreciation and amortization in the consolidated statements of operations.

The carrying amount and accumulated amortization of the Company’s other intangible assets subject to amortization at each balance sheet date are as follows (in thousands):

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	297,991	$	(131,187	)	$	166,804	$	305,218	$	(116,677	)	$	188,541
Trademarks and tradenames		16,348		(15,025	)		1,323		16,646		(13,906	)		2,740
	$	314,339	$	(146,212	)	$	168,127	$	321,864	$	(130,583	)	$	191,281

Other intangible assets amortization expense recorded during the years ended December 31, 2018, 2017, and 2016, totaled $19.0 million, $19.4 million, and $21.2 million, respectively.

Based on capitalized intangible assets at December 31, 2018, and assuming no impairment of these intangible assets, estimated amortization expense amounts in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
2019	$	49,229	$	21,825
2020		39,014		20,944
2021		25,382		20,451
2022		12,228		20,303
2023		6,349		20,000
Thereafter		5,026		64,604
Total	$	137,228	$	168,127

Debt

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Debt

5. Debt

As of December 31, 2018, the Company had $285.0 million and $400.0 million outstanding under its Term Credit Facility and Senior Notes, respectively, with up to $500.0 million of unused borrowings under the Revolving Credit Facility portion of the Credit Agreement, as amended.

Credit Agreement

On February 24, 2017, the Company entered into an amended and restated credit agreement (the “Credit Agreement”), replacing the existing agreement, with a syndicate of financial institutions, as lenders, and Bank of America, N.A., as Administrative Agent, providing for revolving loans, swingline loans, letters of credit, and a term loan. The Credit Agreement consists of (a) a five-year $500.0 million senior secured revolving credit facility (the “Revolving Credit Facility”), which includes sublimits for (1) the issuance of standby letters of credit and (2) swingline loans, and (b) a five-year $415.0 million senior secured term loan facility (the “Term Credit Facility” and, together with the Revolving Credit Facility, the “Credit Facility”). The Credit Agreement also allows the Company to request optional incremental term loans and increases in the revolving commitment.

The loans under the Credit Facility may be made to the Company, and the letters of credit under the Revolving Credit Facility may be issued on behalf of the Company. On February 24, 2017, the Company borrowed an aggregate principal amount of $12.0 million under the Revolving Credit Facility and borrowed $415.0 million under the Term Credit Facility.

At the Company’s option, borrowings under the Credit Facility bear interest at an annual rate equal to either (a) a base rate determined by reference to the highest of (1) the annual interest rate publicly announced by the Administrative Agent as its Prime Rate, (2) the federal funds effective rate plus 1/2 of 1% or (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for a one-month interest period, adjusted for certain additional costs plus 1% or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowings, adjusted for certain additional costs plus an applicable margin. Based on the calculation of the applicable consolidated total leverage ratio,

the applicable margin for borrowings under the Credit Facility is, between

0.25

% to

1.25

% with respect to base rate borrowings and between

1.25

% and

2.25

% with respect to LIBOR rate borrowings. Interest is due and payable monthly. The interest rate in effect at December 31, 2018, for the Credit Facility was

4.27

The Company is also required to pay (a) a commitment fee related to the unutilized commitments under the Revolving Credit Facility, payable quarterly in arrears, (b) letter of credit fees on the maximum amount available to be drawn under all outstanding letters of credit in an amount equal to the applicable margin on LIBOR rate borrowings under the Revolving Credit Facility on an annual basis, payable quarterly in arrears, and (c) customary fronting fees for the issuance of letters of credit fees and agency fees.

The Company’s obligations under the Credit Facility and cash management arrangements entered into with lenders under the Credit Facility (or affiliates thereof) and the obligations of the subsidiary guarantors are secured by first-priority security interests in substantially all assets of the Company and any guarantor, including 100% of the capital stock of ACI Worldwide Corp. and each domestic subsidiary of the Company, each domestic subsidiary of any guarantor, and 65% of the voting capital stock of each foreign subsidiary of the Company that is directly owned by the Company or a guarantor, in each case subject to certain exclusions set forth in the credit documentation governing the Credit Facility. On October 9, 2018, the Company entered into the first amendment to the collateral agreement of the Credit Agreement. This amendment released the lien on certain assets of Official Payments Corporation (“OPAY”), our electronic bill presentment and payment affiliate, to allow OPAY to comply with certain eligible securities and unencumbered asset requirements related to money transmitter or transfer license rules and regulations.

The Credit Agreement contains a number of covenants that, among other things and subject to certain exceptions, restrict the Company’s ability and, as applicable, the ability of its subsidiaries to: create, incur, assume or suffer to exist any additional indebtedness; create, incur, assume or suffer to exist any liens; enter into agreements and other arrangements that include negative pledge clauses; pay dividends on capital stock or redeem, repurchase or retire capital stock or subordinated indebtedness; create restrictions on the payment of dividends or other distributions by subsidiaries; make investments, loans, advances and acquisitions; merge, consolidate or enter into any similar combination or sell assets, including equity interests of the subsidiaries; enter into sale and leaseback transactions; directly or indirectly engage in transactions with affiliates; alter in any material respect the character or conduct of the business; enter into amendments of or waivers under subordinated indebtedness, organizational documents and certain other material agreements; and hold certain assets and incur certain liabilities.

Senior Notes

On August 21, 2018, the Company completed a $400.0 million offering of the 2026 Notes at an issue price of 100% of the principal amount in a private placement for resale to qualified institutional buyers. The 2026 Notes bear interest at an annual rate of 5.750%, payable semi-annually in arrears on February 15 and August 15 of each year, commencing on February 15, 2019. Interest accrued from August 21, 2018. The 2026 Notes will mature on August 15, 2026. In connection with the issuance of the 2026 Notes, the Company incurred and paid debt issuance costs of $7.3 million as of December 31, 2018.

The Company used the net proceeds of the offering described above to redeem, in full, the Company’s outstanding 2020 Notes, including accrued interest, and repaid a portion of the outstanding amount under the Term Credit Facility.

Maturities on long-term debt outstanding at December 31, 2018, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	23,747
2020		23,747
2021		31,662
2022		205,803
2023		—
Thereafter		400,000
Total	$	684,959

The Credit Agreement and 2026 Notes also contain certain customary mandatory prepayment provisions. As specified in the Credit Agreement and 2026 Notes agreement, if certain events shall occur, the Company may be required to repay all or a portion of the amounts outstanding under the Credit Facility or 2026 Notes.

The Credit Facility will mature on

February 24, 2022

, and the 2026 Notes will mature on

August 15, 2026

. The Revolving Credit Facility and 2026 Notes do not amortize. The Term Credit Facility does amortize, with principal payable in consecutive quarterly installments.

The Credit Agreement and 2026 Notes contain certain customary affirmative covenants and negative covenants that limit or restrict, subject to certain exceptions, the incurrence of liens, indebtedness of subsidiaries, mergers, advances, investments, acquisitions, transactions with affiliates, change in nature of business, and the sale of the assets.

The Company is also required to maintain a consolidated leverage ratio at or below a specified amount and an interest coverage ratio at or above a specified amount. As specified in the Credit Agreement and 2026 Notes agreement, if an event of default shall occur and be continuing, the Company may be required to repay all amounts outstanding under the Credit Facility and 2026 Notes. As of December 31, 2018, and at all times during the period, the Company was in compliance with its financial debt covenants.

Total debt is comprised of the following (in thousands):

	December 31, 2018			December 31, 2017
Term credit facility	$	284,959		$	394,250
Revolving credit facility		—			2,000
5.750 % Senior Notes, due August 2026		400,000			—
6.375 % Senior Notes, due August 2020		—			300,000
Debt issuance costs		(13,203	)		(10,521	)
Total debt		671,756			685,729
Less current portion of term credit facility		23,747			20,750
Less current portion of debt issuance costs		(2,980	)		(2,964	)
Total long-term debt	$	650,989		$	667,943

Other

During the year ended December 31, 2018, the Company financed certain multi-year license agreements for internally-used software for $11.9 million with annual payments

through June 2023

. As of December 31, 2018, $9.4 million is outstanding, of which $2.5 million and $6.9 million is included in other current liabilities and other noncurrent liabilities, respectively, in the accompanying consolidated balance sheet as of December 31, 2018. These arrangements have been treated as a non-cash investing and financing activity for purposes of the consolidated statement of cash flows.

Corporate Restructuring and Other Organizational Changes

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Corporate Restructuring and Other Organizational Changes

6. Corporate Restructuring and Other Organizational Changes

Lease Terminations

During the year ended December 31, 2017, the Company ceased use of a portion of its leased facilities in Edison, NJ; Chantilly, VA; Charlotte, NC; Parsippany, NJ; and Waltham, MA. As a result, the Company recorded additional expense of $2.4 million, which was recorded in general and administrative expenses in the consolidated statements of operations for the year ended December 31, 2017.

During the year ended December 31, 2016, the Company ceased use of a portion of its leased facilities in Watford, U.K.; Providence, RI; Chantilly, VA; and West Hills, CA. As a result, the Company recorded additional expense of $5.0 million, which was recorded in general and administrative expenses in the consolidated statements of operations for the year ended December 31, 2016.

The components of corporate restructuring and other reorganization activities from the acquisitions are included in the following table (in thousands):

	Facility Closures
Balance, December 31, 2016	$	4,559
Restructuring charges (adjustments) incurred, net		2,447
Amounts paid during the period		(1,285	)
Foreign currency translation adjustments		224
Balance, December 31, 2017	$	5,945
Amounts paid during the period		(1,732	)
Foreign currency translation adjustments		(86	)
Balance, December 31, 2018	$	4,127

Of the $4.1 million facility closure liability, $1.6 million and $2.5 million is recorded in other current liabilities and other noncurrent liabilities, respectively, in the consolidated balance sheet at December 31, 2018.

Common Stock and Treasury Stock

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Common Stock and Treasury Stock

7. Common Stock and Treasury Stock

In 2005, the Company’s board approved a stock repurchase program authorizing the Company, as market and business conditions warrant, to acquire its common stock and periodically authorize additional funds for the program. In February 2018, the board approved the repurchase of up to $200.0 million of the Company’s common stock, in place of the remaining purchase amounts previously authorized.

The Company repurchased 2,346,427 shares for $54.5 million under the program for the year ended December 31, 2018. Under the program to date, the Company has repurchased 44,129,393 shares for approximately $547.8 million. As of December 31, 2018, the maximum remaining amount authorized for purchase under the stock repurchase program was $176.6 million.

During the year ended September 30, 2006, the Company began to issue shares of treasury stock upon exercise of stock options, payment of earned performance shares, issuance of restricted share awards (“RSAs”), vesting of restricted share units (“RSUs”), and for issuances of common stock pursuant to the Company’s employee stock purchase plan. Treasury shares issued during the year ended December 31, 2016, included 797,140; 148,322; and 470,029 shares issued pursuant to stock option exercises, RSA grants, and retention restricted share award (“retention RSA”) grants, respectively. Treasury shares issued during the year ended December 31, 2017, included 1,204,559 and 560,174 shares issued pursuant to stock option exercises and RSA grants, respectively. Treasury shares issued during the year ended December 31, 2018, included 1,379,704 and 10,000 shares issued pursuant to stock option exercises and RSUs vested, respectively.

Earnings Per Share

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Earnings Per Share

8. Earnings Per Share

Basic earnings per share is computed in accordance with ASC 260,

Earnings per Share,

based on weighted average outstanding common shares. Diluted earnings per share is computed based on basic weighted average outstanding common shares adjusted for the dilutive effect of stock options and RSUs.

The following table reconciles the weighted average share amounts used to compute both basic and diluted earnings per share (in thousands):

	Years Ended December 31,
	2018		2017		2016
Weighted average shares outstanding:
Basic weighted average shares outstanding		116,057		118,059		117,533
Add: Dilutive effect of stock options and RSUs		1,575		1,385		1,314
Diluted weighted average shares outstanding		117,632		119,444		118,847

The diluted earnings per share computation excludes 2.2

million, 3.9

million, and 6.1

million options to purchase shares and contingently issuable shares during the years ended December

2018

2017

, and

2016

, respectively, as their effect would be anti-dilutive.

Common stock outstanding as of December

2018

and

2017

, was 116,123,361

and 117,096,731

, respectively.

Other, Net

12 Months Ended

Dec. 31, 2018

Other Income and Expenses [Abstract]

Other, Net

9. Other, Net

Other, net is comprised of foreign currency transaction losses of $3.7 million and $2.6 million for the years ended December 31, 2018 and 2017, respectively, and foreign currency transaction gains of $4.1 million for the year ended December 31, 2016.

Segment Information

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Segment Information

10. Segment Information

The Company reports financial performance based on its segments, ACI On Premise and ACI On Demand, and analyzes Segment Adjusted EBITDA as a measure of segment profitability.

The Company’s Chief Executive Officer is also the chief operating decision maker, or CODM. The CODM, together with other senior management personnel, focus their review on consolidated financial information and the allocation of resources based on operating results, including revenues and Segment Adjusted EBITDA, for each segment, separate from Corporate operations.

ACI On Premise serves customers who manage their software on site. These on-premise customers use the Company’s software to develop sophisticated solutions, which are often part of a larger system located and managed at the customer specified site. These customers require a level of control and flexibility that ACI On Premise solutions can offer, and they have the resources and expertise to take a lead role in managing these solutions.

ACI On Demand serves the needs of banks and merchants and corporates who use payments to facilitate their core business. These on-demand solutions are maintained and delivered through the cloud via our global data centers and are available in either a single-tenant environment, SaaS offerings, or in a multi-tenant environment, PaaS offerings.

Revenue is attributed to the reportable segments based upon the product sold and mechanism for delivery to the customer. Expenses are attributed to the reportable segments in one of three methods, (1) direct costs of the segment, (2) labor costs that can be attributed based upon time tracking for individual products, or (3) costs that are allocated. Allocated costs are generally marketing and sales related activities as well as information technology and facilities related expense for which multiple segments benefit. The Company also allocates certain depreciation costs to the segments.

Segment Adjusted EBITDA is the measure reported to the CODM for purposes of making decisions on allocating resources and assessing the performance of the Company’s segments and, therefore, Segment Adjusted EBITDA is presented in conformity with ASC 280,

Segment Reporting

. Segment Adjusted EBITDA is defined as earnings (loss) from operations before interest, income tax expense (benefit), depreciation and amortization (“EBITDA”) adjusted to exclude stock-based compensation, and net other income (expense). During the first quarter of 2018, the Company changed the presentation of its segment measure of profit and loss. As a result, the 2017 and 2016 segment disclosures have been recast to conform with the 2018 presentation.

Corporate and unallocated expenses consists of the corporate overhead costs that are not allocated to reportable segments. These overhead costs relate to human resources, finance, legal, accounting, merger and acquisition activity, and other costs that are not considered when management evaluates segment performance. For the year ended December 31, 2017, Corporate and unallocated expenses

included $46.7

million of general and administrative expense for the legal judgment discussed in Note 14. For the year ended December 31, 2016, Corporate and unallocated expenses includes revenue and operating income from the operations and sale of CFS related assets and liabilities

of $15.4

million and $151.7

million, respectively.

The following is selected financial data for the Company’s reportable segments for the periods indicated (in thousands):

	Years Ended December 31 ,
	2018			2017			2016
Revenues
ACI On Premise	$	576,755		$	598,590		$	591,252
ACI On Demand		433,025			425,601			399,033
Corporate and other		—			—			15,416
Total revenue	$	1,009,780		$	1,024,191		$	1,005,701
Segment Adjusted EBITDA
ACI On Premise	$	323,902		$	347,094		$	312,188
ACI On Demand		12,015			(1,832	)		(2,624	)
Depreciation and amortization		(97,350	)		(102,224	)		(103,454	)
Stock-based compensation expense		(20,360	)		(13,683	)		(43,613	)
Corporate and unallocated expenses		(92,296	)		(144,715	)		58,633
Interest, net		(30,388	)		(38,449	)		(39,654	)
Other, net		(3,724	)		(2,619	)		4,105
Income before income taxes	$	91,799		$	43,572		$	185,581
Depreciation and amortization
ACI On Premise	$	11,634		$	13,094		$	14,581
ACI On Demand		31,541			34,171			29,385
Corporate		54,175			54,959			59,488
Total depreciation and amortization	$	97,350		$	102,224		$	103,454
Stock-based compensation expense
ACI On Premise	$	4,348		$	2,234		$	6,894
ACI On Demand		4,338			2,230			6,876
Corporate		11,674			9,219			29,843
Total stock-based compensation expense	$	20,360		$	13,683		$	43,613

Assets are not allocated to segments, and the Company’s

CODM does not evaluate operating segments using discrete asset information.

The following is revenue by primary geographic market and primary solution category for the Company’s reportable segments for the periods indicated (in thousands):

	Year Ended December 31, 2018						Year Ended December 31, 2017
	ACI On Premise		ACI On Demand		Total		ACI On Premise		ACI On Demand		Total
Primary Geographic Markets
Americas - United States	$	131,382	$	369,097	$	500,479	$	175,682	$	365,553	$	541,235
Americas - Other		61,969		9,577		71,546		72,802		9,429		82,231
EMEA		296,157		48,889		345,046		270,388		47,872		318,260
Asia Pacific		87,247		5,462		92,709		79,718		2,747		82,465
Total	$	576,755	$	433,025	$	1,009,780	$	598,590	$	425,601	$	1,024,191
Primary Solution Categories
Bill Payments	$	—	$	275,526	$	275,526	$	—	$	271,421	$	271,421
Digital Channels		35,231		40,342		75,573		47,973		46,063		94,036
Merchant Payments		30,153		59,789		89,942		26,430		50,523		76,953
Payments Intelligence		42,647		46,497		89,144		33,203		47,123		80,326
Real-Time Payments		92,068		2,193		94,261		70,087		2,785		72,872
Retail Payments		376,656		8,678		385,334		420,897		7,686		428,583
Total	$	576,755	$	433,025	$	1,009,780	$	598,590	$	425,601	$	1,024,191

	Year Ended December 31, 2016
	ACI On Premise		ACI On Demand		Other Corporate		Total
Primary Geographic Markets
Americas - United States	$	164,058	$	347,957	$	15,416	$	527,431
Americas - Other		110,463		6,255		—		116,718
EMEA		217,576		43,584		—		261,160
Asia Pacific		99,155		1,237		—		100,392
Total	$	591,252	$	399,033	$	15,416	$	1,005,701
Primary Solution Categories
Bill Payments	$	—	$	255,540	$	—	$	255,540
Digital Channels		49,617		59,597		15,416		124,630
Merchant Payments		29,311		35,315		—		64,626
Payments Intelligence		24,665		42,984		—		67,649
Real-Time Payments		70,289		705		—		70,994
Retail Payments		417,370		4,892		—		422,262
Total	$	591,252	$	399,033	$	15,416	$	1,005,701

Digital Channels revenue includes $15.4 million from CFS-related assets for the year ended December 31, 2016.

The following is the Company’s long-lived assets by geographic location for the periods indicated (in thousands):

	December 31 ,
	2018		2017
Long lived assets
United States	$	811,435	$	759,513
Other		717,495		613,556
	$	1,528,930	$	1,373,069

No single customer accounted for more than 10% of the Company’s consolidated revenues during the years ended December 31, 2018, 2017, and 2016.

No other country outside the United States accounted for more than 10% of the Company’s consolidated revenues during the years ended December 31, 2018, 2017, and 2016.

Stock-Based Compensation Plans

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Plans

11. Stock-Based Compensation Plans

Employee Stock Purchase Plan

On April 6, 2017, the board approved the 2017 Employee Stock Purchase Plan (“2017 ESPP”), which was approved by shareholders at the 2017 Annual Shareholder meeting. The 2017 ESPP provides employees with an opportunity to purchase shares of the Company’s common stock. The 1999 Employee Stock Purchase Plan terminated upon the August 1, 2017, effective date of the 2017 ESPP. Under the Company’s 2017 ESPP, a total of 3,000,000 shares of the Company’s common stock have been reserved for issuance to eligible employees. Participating employees are permitted to designate up to the lesser of $25,000 or 10% of their annual base compensation for the purchase of common stock under the ESPP. Purchases under the ESPP are made one calendar month after the end of each fiscal quarter. The price for shares of common stock purchased under the ESPP is 85% of the stock’s fair market value on the last business day of the three-month participation period. Shares issued under the ESPP during the years ended December 31, 2018, 2017, and 2016, totaled 148,520; 158,194; and 188,453, respectively.

Additionally, the discount offered pursuant to the Company’s ESPP discussed above is 15%, which exceeds the 5% non-compensatory guideline in ASC 718 and exceeds the Company’s estimated cost of raising capital. Consequently, the entire 15% discount to employees is deemed to be compensatory for purposes of calculating expense using a fair value method. Compensation expense related to the ESPP for each of the years ended December 31, 2018, 2017, and 2016, was approximately $0.5 million.

Stock Incentive Plans – Active Plans

2016 Equity and Performance Incentive Plan

On March 23, 2016, the board approved the 2016 Equity and Performance Incentive Plan (the “2016 Incentive Plan”). The 2016 Incentive Plan is intended to meet the Company’s objective of balancing stockholder concerns about dilution with the need to provide appropriate incentives to achieve Company performance objectives. The 2016 Incentive Plan was adopted by the stockholders on June 14, 2016. Following the adoption of the 2016 Incentive Plan, the 2005 Equity and Performance Incentive Plan, as amended (the “2005 Incentive Plan”) was terminated. Termination of the 2005 Incentive Plan did not affect any equity awards outstanding under the 2005 Incentive Plan.

The 2016 Incentive Plan provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted share and restricted share units, performance shares and performance units, and other awards (“awards”). Subject to adjustment in certain circumstances, the maximum number of shares of common stock that may be issued or transferred in connection with awards granted under the 2016 Incentive Plan will be the sum of (i) 8,000,000 shares of common stock and (ii) any shares of common stock that are represented by options previously granted under the 2005 Incentive Plan which are forfeited, expire, or are canceled without delivery of common stock or which result in the forfeiture or relinquishment of common stock back to the Company. To the extent awards granted under the 2016 Incentive Plan terminate, expire, are canceled without being exercised, are forfeited or lapse for any reason, the shares of common stock subject to such award will again become available for grants under the 2016 Incentive Plan.

The 2016 Incentive Plan expressly prohibits re-pricing stock options and appreciation rights. The 2016 Incentive Plan also, subject to certain limited exceptions, expressly requires a one-year vesting period for all stock options and appreciation rights.

No eligible person selected by the board to receive awards (“participant”) will receive stock options, stock appreciation rights, restricted share awards, restricted share units, and other awards under the 2016 Incentive Plan, during any calendar year, for more than 3,000,000 shares of common stock. In addition, no participant may receive performance shares or performance units having an aggregate value on the date of grant in excess of $9,000,000 during any calendar year. Each of the limits described above may be adjusted equitably to accommodate a change in the capital structure of the Company.

2005 Equity and Performance Incentive Plan

The Company had a 2005 Incentive Plan, as amended, under which shares of the Company’s common stock were reserved for issuance to eligible employees or non-employee directors of the Company. The 2005 Incentive Plan provided for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock awards, performance awards, and other awards. The maximum number of shares of the Company’s common stock that was issued or transferred in connection with awards granted under the 2005 Incentive Plan was the sum of (i) 23,250,000 shares and (ii) any shares represented by outstanding options that had been granted under designated terminated stock option plans that were subsequently forfeited, expired, or are canceled without delivery of the Company’s common stock.

Stock Options

Stock options granted pursuant to the 2016 Incentive Plan are granted at an exercise price not less than the market value per share of the Company’s common stock on the date of grant. Under the 2016 Incentive Plan, the term of the outstanding options may not exceed ten years nor be less than one year. Vesting of options is determined by the compensation committee of the board and the administrator of the 2016 Incentive Plan and can vary based upon the individual award agreements. In addition, outstanding options do not have dividend equivalent rights associated with them under the 2016 Incentive Plan.

A summary of stock option activity under the various stock incentive plans previously described is as follows:

Stock Options	Number of Shares			Weighted- Average Exercise Price ($)		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value of In-the-Money Options ($)
Outstanding, December 31, 2017		6,162,717		$	16.83
Granted		170,455			23.36
Exercised		(1,379,704	)		14.26
Forfeited		(88,632	)		18.56
Outstanding, December 31, 2018		4,864,836		$	17.76		6.09	$	48,214,530
Exercisable, December 31, 2018		3,416,715		$	17.04		5.43	$	36,309,807

The weighted-average grant date fair value of stock options granted during the years ended December 31, 2018, 2017, and 2016, was $7.03, $6.24, and $5.59, respectively. The total intrinsic value of stock options exercised during the years ended December 31, 2018, 2017, and 2016, was $15.8 million, $13.4 million, and $6.8 million, respectively.

The fair value of options granted in the respective fiscal years are estimated on the date of grant using the Black-Scholes option-pricing model, acceptable under ASC 718, with the following weighted-average assumptions:

	Years Ended December 31,
	2018			2017			2016
Expected life (years)		5.6			5.6			5.9
Risk-free interest rate		2.7	%		1.9	%		1.2	%
Expected volatility		26.4	%		29.4	%		29.7	%
Expected dividend yield		—			—			—

Expected volatilities are based on the Company’s historical common stock volatility, derived from historical stock price data for periods commensurate with the options’ expected life. The expected life of options granted represents the period of time options are expected to be outstanding, based primarily on historical employee option exercise behavior. The risk-free interest rate is based on the implied yield currently available on U.S. Treasury zero coupon bonds issued with a term equal to the expected life at the date of grant of the options. The expected dividend yield is zero, as the Company has historically paid no dividends and does not anticipate dividends to be paid in the future.

During the year ended December 31, 2016, the Company granted supplemental stock options with three tranches at a grant date fair value of $7.46, $7.06, and $6.50, respectively,

per share. These options vest, if at all, based upon (i) tranche one – any time after the third anniversary date if the stock has traded

at 133% of the exercise price for at least 20 consecutive trading days,

(ii) tranche two – any time after the fourth anniversary date if the stock has traded

at 167% of the exercise price for at least 20 consecutive trading days, and

(iii) tranche three – any time after the fifth anniversary date if the stock has traded

at 200% of the exercise price for at least 20 consecutive trading days. The employees must remain employed with the Company as of the anniversary date for the supplemental stock options to vest. The exercise price of these options is the closing market price on the date the awards were granted. With respect to supplemental stock options granted that vest based on the achievement of certain market conditions, the grant date fair value was estimated using a Monte Carlo simulation model with the following weighted-average assumptions:

	Year Ended
	December 31, 2016
Expected life (years)		7.5
Risk-free interest rate		1.6	%
Expected volatility		41.6	%
Expected dividend yield		—

Long-term Incentive Program Performance Share Awards

During the years ended December 31, 2017 and 2016, pursuant to the Company’s 2016 Incentive Plan and 2005 Incentive Plan, the Company granted long-term incentive program performance share awards (“LTIP performance shares”). These LTIP performance shares are earned, if at all, based upon the achievement, over a specified period that must not be less than one year and is typically a three-year performance period, of performance goals related to (i) the compound annual growth over the performance period in the sales for the Company as determined by the Company, and (ii) the cumulative operating income or EBITDA over the performance period as determined by the Company. Up to 200% of the LTIP performance shares may be earned upon achievement of performance goals equal to or exceeding the maximum target levels for the performance goals over the performance period. On a quarterly basis, management must evaluate the probability that the threshold performance goals will be achieved, if at all, and the anticipated level of attainment to determine the amount of compensation expense to record in the consolidated financial statements.

During the fourth quarter of the year ended December 31, 2017, the Company revised the expected attainment rates for the awards granted in fiscal 2015 and 2016 from 100% to 0% and 65%, respectively, due to changes in actual and forecasted sales and operating income.

During the fourth quarter of the year ended December 31, 2018, the Company revised the expected attainment rates for the awards granted in fiscal year 2016, excluding the 2016 supplemental awards, from 65% to 0%.

The expected attainment rate for the 2017 grants remains at 100%.

A summary of the nonvested LTIP performance shares are as follows:

Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2017		1,125,035		$	18.94
Forfeited		(93,147	)		19.26
Change in expected attainment for 2016 grants		(491,191	)		17.91
Nonvested at December 31, 2018		540,697		$	19.83

Restricted Share Awards

During the years ended December 31, 2017 and 2016, pursuant to the Company’s 2016 Incentive Plan and 2005 Incentive Plan, the Company granted RSAs. The awards have requisite service periods of three years and vest in increments of 33% on the anniversary of the grant dates. Under each arrangement, shares are issued without direct cost to the employee. RSAs granted to our board vest one year from grant or as of the next annual shareholders meeting, whichever is earlier. The Company estimates the fair value of the RSAs based upon the market price of the Company’s stock at the date of grant. The RSA grants provide for the payment of dividends on the Company’s common stock, if any, to the participant during the requisite service period, and the participant has voting rights for each share of common stock. The Company recognizes compensation expense for RSAs on a straight-line basis over the requisite service period.

A summary of nonvested RSAs are as follows:

Nonvested Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2017		503,237		$	20.63
Vested		(231,473	)		21.20
Forfeited		(58,427	)		19.92
Nonvested at December 31, 2018		213,337		$	20.21

During the year ended December 31, 2018, a total of 231,473 RSAs vested. The Company withheld 41,973 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

Performance-Based Restricted Share Awards

During the year ended December 31, 2015, pursuant to the Company’s 2005 Incentive Plan, the Company granted performance-based restricted share awards (“PBRSAs”). The PBRSA grants provided for the payment of dividends on the Company’s common stock, if any, to the participant during the requisite service period, and the participant had voting rights for each share of common stock. These PBRSAs were earned, if at all, based upon the achievement of performance goals over a performance period and completion of the service period. The PBRSAs granted on June 9, 2015, had a graded-vesting period of three years (33% vest each year) and were subject to performance targets based on the Company’s EBITDA. The first 33% of the PBRSAs issued vested subject to meeting the EBITDA target for the year ending December 31, 2015. The remaining 66% of the PBRSAs issued vested 33% at the end of year two and 33% at the end of year three, subject to meeting the EBITDA target for the year ending December 31, 2016. The PBRSAs granted on September 15, 2015, had a vesting period of 1.3 years and were subject to performance targets based on the Company’s EBITDA for the year ending December 31, 2016. In no event did any of the PBRSAs become earned if the Company’s EBITDA was below a predetermined minimum threshold level at the conclusion of the performance period. Assuming achievement of the predetermined EBITDA threshold level, up to 150% of the PBRSAs were earned upon achievement of performance goals equal to or exceeding the maximum target levels for the performance goals over the performance period. On a quarterly basis, management evaluated the probability that the threshold performance goals were achieved, if at all, and the anticipated level of attainment to determine the amount of compensation expense to record in the consolidated financial statements.

During the year ended December 31, 2016, the first tranche of the June 9th grant vested at 90.4%. During the first quarter of the year ended December 31, 2017, the Company revised the attainment rate for the second and third tranches of the June 9th grant and the September 15th grant from 100% to 98% due to actual EBITDA achieved. The Company recognized compensation expense for PBRSAs on a straight-line basis over the requisite service periods.

A summary of nonvested PBRSAs are as follows:

Nonvested Performance-Based Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		173,636		$	24.41
Vested		(173,636	)		24.41
Nonvested as of December 31, 2018		—		$	—

During the years ended December 31, 2018, a total of 173,636 PBRSAs vested. The Company withheld 64,699 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

Total Shareholder Return Awards

During the years ended December 31, 2018 and 2017, pursuant to the 2016 Incentive Plan, the Company granted total shareholder return awards (“TSRs”). TSRs are performance shares that are earned, if at all, based upon the Company’s total shareholder return as compared to a group of peer companies over a three-year performance period. The award payout can range from 0% to 200%. To determine the grant date fair value of the TSRs, a Monte Carlo simulation model is used. The Company recognizes compensation expense for the TSRs over a three-year performance period based on the grant date fair value.

The grant date fair value of the TSRs was estimated using the following weighted-average assumptions:

	Years Ended December 31,
	2018			2017
Expected life (years)		2.9			2.9
Interest rate		2.4	%		1.5	%
Volatility		28.0	%		26.5	%
Dividend Yield		—			—

A summary of nonvested TSRs are as follows:

Nonvested Total Shareholder Return Awards	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		143,649		$	24.37
Granted		541,214			31.31
Forfeited		(42,855	)		30.19
Change in attainment		76,923			24.37
Nonvested as of December 31, 2018		718,931		$	29.25

Restricted Share Units

During the year ended December 31, 2018, pursuant to the 2016 Incentive Plan, the Company granted restricted share unit awards (“RSUs”). RSUs generally have requisite service periods of three years and vest in increments of 33% on the anniversary of the grant dates. Under each arrangement, RSUs are issued without direct cost to the employee on the vesting date. The Company estimates the fair value of the RSUs based upon the market price of the Company’s stock at the date of grant. The Company recognizes compensation expense for RSUs on a straight-line basis over the requisite service period.

A summary of nonvested RSUs are as follows:

Nonvested Restricted Share Units	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		—		$	—
Granted		714,123			23.81
Vested		(10,000	)		25.72
Forfeited		(53,078	)		23.36
Nonvested as of December 31, 2018		651,045		$	23.82

During the year ended December 31, 2018, a total of 10,000 RSUs vested.

As of December 31, 2018, there was unrecognized compensation expense of $13.2 million related to TSRs, $10.8 million related to RSUs, $3.8 million related to LTIP performance shares, $1.9 million related to nonvested stock options, and $2.5 million related to nonvested RSAs, which the Company expects to recognize over weighted-average periods of 2.0 years, 2.1 years, 1.2 years, 0.9 years, and 1.2 years, respectively.

The Company recorded stock-based compensation expense recognized under ASC 718 during the years ended December 31, 2018, 2017, and 2016, of $20.4 million, $13.7 million, and $43.6 million, respectively, with corresponding tax benefits of $3.9 million, $1.7 million, and $14.3 million, respectively. The Company recognizes compensation expense for stock option awards that vest with only service conditions on a straight-line basis over the requisite service period. The Company recognizes compensation expense for stock option awards that vest with service and market-based conditions on a straight-line basis over the longer of the requisite service period or the estimated period to meet the defined market-based condition.

Employee Benefit Plans

12 Months Ended

Dec. 31, 2018

Retirement Benefits [Abstract]

Employee Benefit Plans

12. Employee Benefit Plans

ACI 401(k) Plan

The ACI 401(k) Plan is a defined contribution plan covering all domestic employees of the Company. Participants may contribute up to 75% of their annual eligible compensation up to a maximum of $18,500 (for employees who are under the age of 50 on December 31, 2018) or a maximum of $24,500 (for employees aged 50 or older on December 31, 2018). After one year of service, the Company matches 100% of the first 4% of eligible participant contributions and 50% of the next 4% of eligible participant contributions, not to exceed $5,000 per employee annually. Company contributions charged to expense during the years ended December 31, 2018, 2017, and 2016, were $6.4 million, $5.3 million, and $5.5 million, respectively.

ACI Worldwide EMEA Group Personal Pension Scheme

The ACI Worldwide EMEA Group Personal Pension Scheme is a defined contribution plan covering substantially all ACI Worldwide (EMEA) Limited (“ACI-EMEA”) employees. For those ACI-EMEA employees who elect to participate in the plan, the Company contributes a minimum of 8.5% of eligible compensation to the plan for employees employed at December 1, 2000 (up to a maximum of 15.5% for employees aged over 55 years on December 1, 2000) or from 6% to 10% of eligible compensation for employees employed subsequent to December 1, 2000. ACI-EMEA contributions charged to expense were $1.6 million during both the years ended December 31, 2018 and 2017, and $1.7 million during the year ended December 31, 2016.

Income Taxes

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

On December 22, 2017, the Tax Cuts and Jobs Act (“Tax Act”) was signed into U.S. Law. In December 2017, the Securities and Exchange Commission staff issued Staff Accounting Bulletin No. 118,

Income Tax Accounting Implications of the Tax Cuts and Jobs Act

, which allowed the Company to record provisional amounts during a measurement period not to extend beyond one year of the enactment date. As of December 31, 2018, the Company has completed its accounting for the tax effects related to the enactment of the Tax Act.

Deferred Tax Assets and Liabilities

The Tax Act reduced the U.S. federal corporate income tax rate from 35% to 21%, effective January 1, 2018. During the year ended December 31, 2017, the Company remeasured certain deferred tax assets and liabilities and recorded a $15.0 million provisional tax charge. During the year ended December 31, 2018, the Company reduced the initial provisional tax charge by recording a $4.9 million benefit related to accelerated tax deductions claimed on the 2017 U.S. Federal Income Tax Return.

One-Time

Transition Tax

The Tax Act required U.S. companies to pay a

one-time

transition tax on certain unremitted foreign earnings. During the year ended December 31, 2017, the Company recorded a $20.9 million provisional tax charge based on post-1986 earnings and profits of foreign subsidiaries that were previously deferred from U.S. income taxes. Upon further analysis, the Company reduced the initial provisional tax charge by recording a $8.1 million benefit during the year ended December 31, 2018.

Foreign Tax Credit Utilization

The Tax Act changed taxation of foreign earnings. Generally, the Company will no longer be subject to U.S. federal income taxes upon the receipt of dividends from foreign subsidiaries, nor will the Company be permitted to utilize foreign tax credits related to such dividends. As a result of the aforementioned, as well as the U.S. federal corporate income tax rate reduction, the acceleration of tax deductions, and the reduction in the

one-time

transition tax, the Company has more U.S. foreign tax credits than it anticipates being able to utilize prior to their expiration. Upon further analysis of certain aspects of the Tax Act and refinement of our calculations during the year ended December 31, 2018, the Company recorded an $15.5 million valuation allowance on this deferred tax asset.

Global Intangible

Low-Taxed

Income (GILTI)

The Tax Act subjects a U.S. shareholder to tax on global intangible

low-taxed

income (GILTI) earned by certain foreign subsidiaries. The FASB Staff Q&A, Topic 740, No 5,

Accounting for Global Intangible

Low-Taxed

Income,

states that an entity can make an accounting policy election to either recognize deferred taxes for temporary basis differences expected to reverse as GILTI in future years or to provide for the tax expense related to GILTI in the year the tax is incurred as a period expense only. The Company has elected to account for GILTI in the year the tax is incurred. For the year ended December 31, 2018, the Company has recorded $2.1 million of tax charge for the current impact of the GILTI provisions.

Indefinite Reinvestment

During the years ended December 31, 2017 and 2016, the Company considered all earnings in foreign subsidiaries to be indefinitely reinvested, and accordingly, recorded no deferred income taxes related to unremitted earnings. As of December 31, 2018, the Company considered only the earnings in its Indian subsidiaries to be indefinitely reinvested. The earnings of all other foreign subsidiaries are no longer considered indefinitely reinvested and the Company recorded a $1.1 million deferred tax charge associated with withholding and state taxes on the future repatriation of those earnings. The Company is also permanently reinvested for outside book/tax basis differences related to foreign subsidiaries.

For financial reporting purposes, income before income taxes includes the following components (in thousands):


	Years Ended December 31,
	2018		2017			2016
United States	$	16,312	$	(42,863	)	$	134,740
Foreign		75,487		86,435			50,841

Total	$	91,799	$	43,572		$	185,581

The expense (benefit) for income taxes consists of the following (in thousands):


	Years Ended December 31,
	2018			2017			2016
Federal
Current	$	6,545		$	2,586		$	14,108
Deferred		(6,587	)		19,212			19,034

Total		(42	)		21,798			33,142
State
Current		4,441			(1,857	)		12,565
Deferred		(2,649	)		(1,324	)		(2,502	)

Total		1,792			(3,181	)		10,063
Foreign
Current		17,626			16,048			11,671
Deferred		3,502			3,772			1,170

Total		21,128			19,820			12,841

Total	$	22,878		$	38,437		$	56,046

Differences between the income tax expense computed at the statutory federal income tax rate and per the consolidated statements of operations are summarized as follows (in thousands):


	Years Ended December 31,
	2018			2017			2016
Tax expense at federal rate of 21% (35% pre-2018)	$	19,278		$	15,250		$	64,953
State income taxes, net of federal benefit		5,246			(2,238	)		7,060
Change in valuation allowance		12,657			(1,884	)		(8,524	)
Foreign tax rate differential		(4,796	)		(15,622	)		(11,830	)
Unrecognized tax benefit increase		1,262			3,007			1,045
Tax effect of foreign operations		8,546			5,532			5,988
Tax benefit of research & development		(2,557	)		(1,904	)		(1,088	)
Transition tax		(8,112	)		20,867			—
Revaluation of deferred tax balances		(4,937	)		14,953			—
Performance-based compensation		(4,541	)		2,081			—
Domestic production activities		—			(3,793	)		(700	)
Other		832			2,188			(858	)

Income tax provision	$	22,878		$	38,437		$	56,046

The countries having the greatest impact on the tax rate adjustment line shown in the above table as “Foreign tax rate differential” for the year ended December 31, 2018, are Ireland and Luxembourg. The countries having the greatest impact on the tax rate adjustment line shown in the above table as “Foreign tax rate differential” for the year ended December 31, 2017, are Ireland, Luxembourg, and the United Kingdom. The countries having the greatest impact on the tax rate adjustment line shown in the above table as “Foreign tax rate differential” for the year ended December 31, 2016, are Ireland, South Africa, and the United Kingdom.

The deferred tax assets and liabilities result from differences in the timing of the recognition of certain income and expense items for tax and financial accounting purposes. The sources of these differences at each balance sheet date are as follows (in thousands):


	December 31,
	2018			2017
Deferred income tax assets:
Net operating loss carryforwards	$	25,745		$	38,419
Tax credits		43,838			37,305
Compensation		15,934			18,124
Deferred revenue		27,587			22,248
Research and development expense deferral		12,631			—
Other		5,393			9,055

Gross deferred income tax assets		131,128			125,151
Less: valuation allowance		(20,415	)		(7,808	)

Net deferred income tax assets	$	110,713		$	117,343

Deferred income tax liabilities:
Depreciation and amortization	$	(60,872	)	$	(67,504	)
Deferred revenue		(54,508	)		—

Total deferred income tax liabilities		(115,380	)		(67,504	)

Net deferred income taxes	$	(4,667	)	$	49,839

Deferred income taxes / liabilities included in the balance sheet are:
Deferred income tax asset – noncurrent	$	27,048		$	66,749
Deferred income tax liability – noncurrent		(31,715	)		(16,910	)

Net deferred income taxes	$	(4,667	)	$	49,839

In assessing the realizability of deferred tax assets, the Company considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. The Company considers projected future taxable income, carryback opportunities, and tax planning strategies in making this assessment. Based upon the level of historical taxable income and projections for future taxable income over the periods which the deferred tax assets are deductible, the Company believes it is more likely than not that it will realize the benefits of these deductible differences, net of the valuation allowances recorded. During the year ended December 31, 2018, the Company increased its valuation allowance by $12.7 million which relates to an increase in valuation allowance on U.S. foreign tax credits offset by a reduction in valuation allowance on U.S. state net operating losses.

At December 31, 2018, the Company had domestic federal tax net operating losses (“NOLs”) of $72.4 million, which will begin to expire in 2019. The Company had deferred tax assets equal to $1.8 million related to domestic state tax NOLs which will begin to expire in 2019. The Company does not have any valuation allowance against the federal tax NOLs but has provided a $1.0 million valuation allowance against the deferred tax asset associated with the state NOLs. The Company had foreign tax NOLs of $32.5 million, of which $30.2 million may be utilized over an indefinite life, with the remainder expiring over the next 17 years. The Company has provided a $1.0 million valuation allowance against the deferred tax asset associated with the foreign NOLs.

The Company had U.S. foreign tax credit carryforwards at December 31, 2018, of $34.6 million, for which an $15.5 million valuation allowance has been provided. The U.S. foreign tax credits will begin to expire in 2022. The Company had foreign tax credit carryforwards in other foreign jurisdictions at December 31, 2018, of $1.5 million, of which $1.1 million may be utilized over an indefinite life, with the remainder expiring over the next seven years. The Company has provided a $1.1 million valuation allowance against the tax benefit associated with these foreign credits. The Company also has domestic federal and state general business credit carryforwards at December 31, 2018, of $12.5 million and $0.7 million, respectively, which will begin to expire in 2019 and 2022, respectively.

The unrecognized tax benefit at December 31, 2018 and 2017, was $28.4 million and $27.2 million, respectively, of which $22.6 million and $21.5 million, respectively, are included in other noncurrent liabilities in the consolidated balance sheets. Of the total unrecognized tax benefit amounts at December 31, 2018 and 2017, $27.5 million and $25.9 million, respectively, represent the net unrecognized tax benefits that, if recognized, would favorably impact the effective income tax rate in the respective years.

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31 is as follows (in thousands):


	2018			2017			2016
Balance of unrecognized tax benefits at beginning of year	$	27,237		$	24,278		$	21,079
Increases for tax positions of prior years		315			2,478			58
Decreases for tax positions of prior years		(61	)		(114	)		(361	)
Increases for tax positions established for the current period		1,185			1,677			5,185
Decreases for settlements with taxing authorities		—			(154	)		(167	)
Reductions resulting from lapse of applicable statute of limitation		(115	)		(1,155	)		(1,310	)
Adjustment resulting from foreign currency translation		(155	)		227			(206	)

Balance of unrecognized tax benefits at end of year	$	28,406		$	27,237		$	24,278

The Company files income tax returns in the U.S. federal jurisdiction, various state and local jurisdictions, and many foreign jurisdictions. The United States, Canada, India, Ireland, Luxembourg, South Africa, and United Kingdom are the main taxing jurisdictions in which the Company operates. The years open for audit vary depending on the tax jurisdiction. In the United States, the Company’s tax returns for years following 2014 are open for audit. In the foreign jurisdictions, the tax returns open for audit generally vary by jurisdiction between 2003 and 2017.

The Company’s Indian income tax returns covering fiscal years 2003, 2005, and 2010 through 2013 are under audit by the Indian tax authority. Other foreign subsidiaries could face challenges from various foreign tax authorities. It is not certain that the local authorities will accept the Company’s tax positions. The Company believes its tax positions comply with applicable tax law and intends to vigorously defend its positions. However, differing positions on certain issues could be upheld by tax authorities, which could adversely affect the Company’s financial condition and results of operations.

The Company believes it is reasonably possible that the total amount of unrecognized tax benefits will decrease within the next 12 months by approximately $3.9 million due to the settlement of various audits and the expiration of statutes of limitations. The Company accrues interest related to uncertain tax positions in interest expense or interest income and recognizes penalties related to uncertain tax positions in other income or other expense. As of December 31, 2018 and 2017, $1.2 million is accrued for the payment of interest and penalties related to income tax liabilities. The aggregate amount of interest and penalties expense (benefit) recorded in the statements of operations for the years ended December 31, 2018, 2017, and 2016, is $0.0 million, $(0.8) million, and $(0.2) million, respectively.

Commitments and Contingencies

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

14. Commitments and Contingencies

In accordance with ASC 460,

Guarantees

, the Company recognizes the fair value for guarantee and indemnification arrangements it issues or modifies if these arrangements are within the scope of the interpretation. In addition, the Company must continue to monitor the conditions that are subject to the guarantees and indemnifications, as required under the previously existing generally accepted accounting principles, to identify if a loss has occurred. If the Company determines it is probable a loss has occurred, then any estimable loss would be recognized under those guarantees and indemnifications. Under its customer agreements, the Company may agree to indemnify, defend, and hold harmless its customers from and against certain losses, damages, and costs arising from claims alleging that the use of its software infringes the intellectual property of a third-party. Historically, the Company has not been required to pay material amounts in connection with claims asserted under these provisions, and accordingly, the Company has not recorded a liability relating to such provisions.

Under its customer agreements, the Company also may represent and warrant to customers that its software will operate substantially in conformance with its documentation, and that the services the Company performs will be performed in a workmanlike manner by personnel reasonably qualified by experience and expertise to perform their assigned tasks. Historically, only minimal costs have been incurred relating to the satisfaction of warranty claims. In addition, from time to time, the Company may guarantee the performance of a contract on behalf of one or more of its subsidiaries, or a subsidiary may guarantee the performance of a contract on behalf of another subsidiary.

Other guarantees include promises to indemnify, defend, and hold harmless the Company’s executive officers, directors, and certain other key officers. The Company’s certificate of incorporation provides that it will indemnify and advance expenses to its directors and officers to the maximum extent permitted by Delaware law. The indemnification covers any expenses and liabilities reasonably incurred by a person, by reason of the fact that such person is, was, or has agreed to be a director or officer, in connection with the investigation, defense, and settlement of any threatened, pending, or completed action, suit, proceeding, or claim. The Company’s certificate of incorporation authorizes the use of indemnification agreements, and the Company enters into such agreements with its directors and certain officers from time to time. These indemnification agreements typically provide for a broader scope of the Company’s obligation to indemnify the directors and officers than set forth in the certificate of incorporation. The Company’s contractual indemnification obligations under these agreements are in addition to the respective directors’ and officers’ rights under the certificate of incorporation or under Delaware law.

Operating Leases

The Company leases office space and equipment under operating leases that run through October 2028. The leases do not impose restrictions as to the Company’s ability to pay dividends or borrow funds, or otherwise restrict the Company’s ability to conduct business. On a limited basis, certain lease arrangements include escalation clauses, which provide for rent adjustments due to inflation changes with the expense recognized on a straight-line basis over the term of the lease. Lease payments subject to inflation adjustments do not represent a significant portion of the Company’s future minimum lease payments. Several leases provide renewal options, but in all cases, such renewal options are at the election of the Company. Certain lease agreements provide the Company with the option to purchase the leased equipment at its fair market value at the conclusion of the lease term.

Total operating lease expense for the years ended December 31, 2018, 2017, and 2016 was $24.6 million, $24.1 million, and $25.3 million, respectively.

Aggregate minimum operating lease payments under these agreements in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Operating Leases
2019	$	16,925
2020		14,212
2021		10,538
2022		8,178
2023		6,529
Thereafter		21,196
Total minimum lease payments	$	77,578

Legal Proceedings

On September 23, 2015, a jury verdict was returned against ACI Worldwide Corp. (“ACI Corp.”), a subsidiary of the Company,

for $

43.8

million in connection with counterclaims brought by Baldwin Hackett & Meeks, Inc. (“BHMI”) in the District Court of Douglas County, Nebraska. On September 21, 2012, ACI Corp. had sued BHMI for misappropriation of ACI Corp.’s trade secrets. The jury found that ACI Corp. had not met its burden of proof regarding these claims. On March 6, 2013, BHMI asserted counterclaims alleged to arise out of ACI Corp.’s filing of its lawsuit. The court entered a judgment against ACI Corp.

for $43.8 million for damages and $2.7 million for attorney fees and costs. ACI Corp. disagreed with the verdicts and judgment, and after the trial court denied ACI Corp.’s post-judgment motions ACI Corp. perfected an appeal of the dismissal of its claims against BHMI and the judgment in favor of BHMI. On June 9, 2017, the Nebraska Supreme Court affirmed the District Court judgment. The Company recorded expense of $48.1 million during the year ended December 31, 2017, of which $46.7 million is included in general and administrative expense and $1.4 million in interest expense in the accompanying consolidated statement of operations. The Company paid the judgment, including interest, during the year ended December 31, 2017.

Accumulated Other Comprehensive Loss

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Accumulated Other Comprehensive Loss

15. Accumulated Other Comprehensive Loss

Activity within accumulated other comprehensive loss for the three years ended December 31, 2018, 2017, and 2016, which consists of foreign currency translation adjustments, was as follows (in thousands):

	Accumulated Other Comprehensive Loss
Balance at December 31, 2015	$	(71,576	)
Other comprehensive loss		(22,524	)
Balance at December 31, 2016		(94,100	)
Other comprehensive income		16,744
Balance at December 31, 2017		(77,356	)
Other comprehensive loss		(15,261	)
Balance at December 31, 2018	$	(92,617	)

Quarterly Financial Data (Unaudited)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data (Unaudited)

16. Quarterly Financial Data (Unaudited)

	Quarter Ended												Year Ended
	March 31,			June 30,			September 30,			December 31,			December 31,
(in thousands, except per share amounts)	2018			2018			2018			2018			2018
Revenues:
Software as a service and platform as a service	$	104,280		$	113,600		$	104,519		$	110,626		$	433,025
License		28,046			45,555			68,964			137,991			280,556
Maintenance		56,659			55,048			54,373			53,065			219,145
Services		20,325			20,792			17,669			18,268			77,054
Total revenues		209,310			234,995			245,525			319,950			1,009,780
Operating expenses:
Cost of revenue (1)		107,336			116,261			102,473			104,281			430,351
Research and development		36,791			37,862			36,008			32,969			143,630
Selling and marketing		31,893			33,160			28,252			24,576			117,881
General and administrative		28,649			28,837			29,537			20,399			107,422
Depreciation and amortization		21,345			21,033			20,896			21,311			84,585
Total operating expenses		226,014			237,153			217,166			203,536			883,869
Operating income (loss)		(16,704	)		(2,158	)		28,359			116,414			125,911
Other income (expense):
Interest expense		(9,365	)		(9,717	)		(12,573	)		(9,875	)		(41,530	)
Interest income		2,744			2,742			2,763			2,893			11,142
Other, net		(55	)		(1,677	)		(1,304	)		(688	)		(3,724	)
Total other income (expense)		(6,676	)		(8,652	)		(11,114	)		(7,670	)		(34,112	)
Income (loss) before income taxes		(23,380	)		(10,810	)		17,245			108,744			91,799
Income tax expense (benefit)		(3,952	)		3,764			2,012			21,054			22,878
Net income (loss)	$	(19,428	)	$	(14,574	)	$	15,233		$	87,690		$	68,921
Earnings (loss) per share
Basic	$	(0.17	)	$	(0.13	)	$	0.13		$	0.76		$	0.59
Diluted	$	(0.17	)	$	(0.13	)	$	0.13		$	0.74		$	0.59

(1)	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.

	Quarter Ended												Year Ended
	March 31,			June 30,			September 30,			December 31,			December 31,
(in thousands, except per share amounts)	2017			2017			2017			2017			2017
Revenues:
Software as a service and platform as a service	$	99,447		$	113,469		$	99,761		$	112,895		$	425,572
License		59,381			54,180			50,017			129,546			293,124
Maintenance		54,471			56,009			56,349			55,242			222,071
Services		18,163			16,941			19,608			28,712			83,424
Total revenues		231,462			240,599			225,735			326,395			1,024,191
Operating expenses:
Cost of revenue (1)		108,543			120,357			107,393			115,993			452,286
Research and development		37,285			34,969			33,935			30,732			136,921
Selling and marketing		27,137			28,817			25,236			26,695			107,885
General and administrative (2)		32,503			72,527			25,302			22,700			153,032
Depreciation and amortization		22,371			22,372			22,446			22,238			89,427
Total operating expenses		227,839			279,042			214,312			218,358			939,551
Operating income (loss)		3,623			(38,443	)		11,423			108,037			84,640
Other income (expense):
Interest expense		(10,160	)		(10,664	)		(9,374	)		(8,815	)		(39,013	)
Interest income		106			150			165			143			564
Other, net		649			(1,766	)		(1,059	)		(443	)		(2,619	)
Total other income (expense)		(9,405	)		(12,280	)		(10,268	)		(9,115	)		(41,068	)
Income (loss) before income taxes		(5,782	)		(50,723	)		1,155			98,922			43,572
Income tax expense (benefit)		(4,174	)		(20,914	)		(2,233	)		65,758			38,437
Net income (loss)	$	(1,608	)	$	(29,809	)	$	3,388		$	33,164		$	5,135
Earnings (loss) per share
Basic	$	(0.01	)	$	(0.25	)	$	0.03		$	0.28		$	0.04
Diluted	$	(0.01	)	$	(0.25	)	$	0.03		$	0.28		$	0.04

(1)	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.
(2)	General and administrative expenses in the second quarter includes the BHMI judgment.

Subsequent Event

12 Months Ended

Dec. 31, 2018

Subsequent Events [Abstract]

Subsequent Event

17. Subsequent Event

Speedpay

On February 28, 2019, the Company and The Western Union Company (“Western Union”) announced that they had entered into a definitive agreement for the Company to acquire Western Union’s Speedpay U.S. domestic bill pay business for approximately $750.0 million in cash.

The Company has obtained commitments from Bank of America, N.A. to arrange, and Bank of America to provide, subject to certain conditions, a senior secured first-lien term loan of $500.0 million under a proposed amendment to the Credit Agreement. The Company will use the funds from the new term loan in addition to drawing on the existing available Revolving Credit Facility to fund the acquisition. The transaction is subject to satisfaction of customary closing conditions, including the expiration of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act.

Nature of Business and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Nature of Business

Consolidated Financial Statements

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated.

Capital Stock

Use of Estimates

Cash and Cash Equivalents

Other Current Assets and Other Current Liabilities

	December 31,
(in thousands)	2018		2017
Settlement deposits	$	23,651	$	22,282
Settlement receivables		8,605		30,063
Other		7,574		5,781
Total other current assets	$	39,830	$	58,126

	December 31,
(in thousands)	2018		2017
Settlement payables	$	31,605	$	48,953
Accrued interest		8,407		7,291
Vendor financed licenses		3,551		1,862
Royalties payable		11,318		9,264
Other		33,173		35,534
Total other current liabilities	$	88,054	$	102,904

Off Balance Sheet Settlement Accounts

Property and Equipment

Property and equipment are stated at cost. Depreciation of these assets is generally computed using the straight-line method over their estimated useful lives based on asset class.

As of December 31, 2018 and 2017, net property and equipment consisted of the following (in thousands):

	Useful Lives		2018			2017
Computer and office equipment	3 - 5 years	$	129,359		$	123,804
Leasehold improvements	Lesser of useful life of improvement or remaining life of lease		32,096			32,364
Furniture and fixtures	7 years		12,500			12,158
Building and improvements	7 - 30 years		14,381			12,651
Land	Non depreciable		1,785			1,785
			190,121			182,762
Less: accumulated depreciation			(117,392	)		(102,534	)
Property and equipment, net		$	72,729		$	80,228

Software

Costs of Software to be Sold, Leased, or Marketed

Internal Use Software

Business Combinations

The Company applies the provisions of ASC 805,

Business Combinations

Other estimates associated with the accounting for acquisitions may change as additional information becomes available regarding the assets acquired and liabilities assumed.

Fair Value

ASC 820,

Fair Value Measurements and Disclosures

•

Level 1 Inputs – Unadjusted quoted prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date.

•

The fair values of cash and cash equivalents approximate the carrying values due to the short period of time to maturity (Level 2 of the fair value hierarchy).

Goodwill and Other Intangibles

In accordance with ASC 350,

Intangibles – Goodwill and Other

Impairment of Long-Lived Assets

Treasury Stock

Stock-Based Compensation Plans

In accordance with ASC 718,

Compensation – Stock Compensation

Stock-Based Compensation Plans

Translation of Foreign Currencies

Income Taxes

New Accounting Standards Recently Adopted

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09,

Revenue from Contracts with Customers

(codified as “ASC 606”) as well as other clarifications and technical guidance related to this new revenue standard, including ASC 340-40,

Other Assets and Deferred Costs – Contracts with Customers

. ASC 606 superseded the revenue recognition requirements in ASC 605,

Revenue Recognition

In August 2016, the FASB issued ASU 2016-15,

Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments

In October 2016, the FASB issued ASU 2016-16,

Intra-Entity Transfers of Assets Other than Inventory

In June 2018, the FASB issued ASU 2018-07,

Improvements to Nonemployee Share-Based Payment Accounting,

as a part of its simplification initiative. ASU 2018-07 expands the scope of ASC 718,

Compensation – Stock Compensation,

In August 2018, the FASB issued ASU 2018-05,

Intangibles – Goodwill and

Other – Internal-Use

Software: Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement

Software

Recently Issued Accounting Standards Not Yet Effective

In February 2016, the FASB issued ASU 2016-02,

Leases

approximately $77.6 million. The Company does not expect the adoption of ASC 842 to have a material effect on its results of operations, stockholders’ equity, or statement of cash flows.

Based on currently available information, the Company expects to recognize operating lease liabilities and ROU assets of $65 million – $75 million and $60 million – $70 million, respectively

In February 2018, the FASB issued ASU 2018-02,

Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income

of cash flows.

Earnings per share

Basic earnings per share is computed in accordance with ASC 260,

Earnings per Share,

Segment Information

The Company reports financial performance based on its segments, ACI On Premise and ACI On Demand, and analyzes Segment Adjusted EBITDA as a measure of segment profitability.

Segment Reporting

included $46.7

of $15.4

million and $151.7

million, respectively.

Nature of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Components of Other Current Assets and Other Current Liabilities

Other Current Assets and Other Current Liabilities

	December 31,
(in thousands)	2018		2017
Settlement deposits	$	23,651	$	22,282
Settlement receivables		8,605		30,063
Other		7,574		5,781
Total other current assets	$	39,830	$	58,126

	December 31,
(in thousands)	2018		2017
Settlement payables	$	31,605	$	48,953
Accrued interest		8,407		7,291
Vendor financed licenses		3,551		1,862
Royalties payable		11,318		9,264
Other		33,173		35,534
Total other current liabilities	$	88,054	$	102,904

Property and Equipment Estimated Useful Lives and Balances

As of December 31, 2018 and 2017, net property and equipment consisted of the following (in thousands):

	Useful Lives		2018			2017
Computer and office equipment	3 - 5 years	$	129,359		$	123,804
Leasehold improvements	Lesser of useful life of improvement or remaining life of lease		32,096			32,364
Furniture and fixtures	7 years		12,500			12,158
Building and improvements	7 - 30 years		14,381			12,651
Land	Non depreciable		1,785			1,785
			190,121			182,762
Less: accumulated depreciation			(117,392	)		(102,534	)
Property and equipment, net		$	72,729		$	80,228

Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Total Receivables

	December 31,
(in thousands)	2018			2017
Billed receivables	$	239,275		$	240,137
Allowance for doubtful accounts		(3,912	)		(4,799	)
Billed receivables, net	$	235,363		$	235,338
Accrued receivables		336,858			27,507
Significant financing component		(35,029	)		—
Total accrued receivables, net		301,829			27,507
Less current accrued receivables		123,053			27,507
Less current significant financing component		(10,234	)		—
Total long-term accrued receivables, net	$	189,010		$	—
Total receivables, net	$	537,192		$	262,845

Activity in Allowance for Doubtful Accounts Receivable

The following reflects activity in the Company’s allowance for doubtful accounts receivable for the periods indicated (in thousands):

	Years Ended December 31,
	2018			2017			2016
Balance, beginning of period	$	(4,799	)	$	(3,873	)	$	(5,045	)
Provision increase		(1,505	)		(2,086	)		(1,595	)
Amounts written off, net of recoveries		2,269			1,305			2,551
Foreign currency translation adjustments and other		123			(145	)		216
Balance, end of period	$	(3,912	)	$	(4,799	)	$	(3,873	)

Changes in Deferred Revenue

Changes in deferred revenue were as follows (in thousands):

	Deferred Revenue
Balance, January 1, 2018	$	145,344
Deferral of revenue		215,188
Recognition of deferred revenue		(200,061	)
Foreign currency translation		(4,336	)
Balance, December 31, 2018	$	156,135

Financial Statement Effect of Applying ASC 606

The financial statement line items affected by adoption of ASC 606 are as follows (in thousands):

	December 31, 2018
	As Reported		Without Application of ASC 606		Effect of Change Higher / (Lower)
Assets
Receivables, net of allowances	$	348,182	$	272,409	$	75,773
Recoverable income taxes		6,686		13,539		(6,853	)
Prepaid expenses		23,277		24,018		(741	)
Other current assets		39,830		38,717		1,113
Accrued receivables, net		189,010		—		189,010
Deferred income taxes, net		27,048		61,554		(34,506	)
Other noncurrent assets		52,145		41,590		10,555
Liabilities
Deferred revenue		104,843		134,565		(29,722	)
Income taxes payable		5,239		5,472		(233	)
Other current liabilities		88,054		88,288		(234	)
Deferred income taxes, net		31,715		10,178		21,537
Stockholders’ equity
Total stockholders’ equity		1,048,231		805,228		243,003

	Year Ended December 31, 2018
	As Reported			Without Application of ASC 606			Effect of Change Higher / (Lower)
Revenues
Software as a service and platform as a service	$	433,025		$	432,095		$	930
License		280,556			281,355			(799	)
Maintenance		219,145			221,189			(2,044	)
Services		77,054			77,595			(541	)
Operating expenses
Selling and marketing		117,881			110,417			7,464
Other income (expense)
Interest income		11,142			831			10,311
Other, net		(3,724	)		(3,274	)		(450	)
Income tax provision
Income tax expense (benefit)		22,878			22,981			(103	)

Software and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount and Accumulated Amortization of Other Intangible Assets

The carrying amount and accumulated amortization of the Company’s other intangible assets subject to amortization at each balance sheet date are as follows (in thousands):

	December 31, 2018							December 31, 2017
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	297,991	$	(131,187	)	$	166,804	$	305,218	$	(116,677	)	$	188,541
Trademarks and tradenames		16,348		(15,025	)		1,323		16,646		(13,906	)		2,740
	$	314,339	$	(146,212	)	$	168,127	$	321,864	$	(130,583	)	$	191,281

Estimated Intangible Asset Amortization Expense in Future Fiscal Years

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
2019	$	49,229	$	21,825
2020		39,014		20,944
2021		25,382		20,451
2022		12,228		20,303
2023		6,349		20,000
Thereafter		5,026		64,604
Total	$	137,228	$	168,127

Debt (Tables)

12 Months Ended

Dec. 31, 2018

Debt Disclosure [Abstract]

Maturities on Long-Term Debt Outstanding

Maturities on long-term debt outstanding at December 31, 2018, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	23,747
2020		23,747
2021		31,662
2022		205,803
2023		—
Thereafter		400,000
Total	$	684,959

Schedule of Total Debt

Total debt is comprised of the following (in thousands):

	December 31, 2018			December 31, 2017
Term credit facility	$	284,959		$	394,250
Revolving credit facility		—			2,000
5.750 % Senior Notes, due August 2026		400,000			—
6.375 % Senior Notes, due August 2020		—			300,000
Debt issuance costs		(13,203	)		(10,521	)
Total debt		671,756			685,729
Less current portion of term credit facility		23,747			20,750
Less current portion of debt issuance costs		(2,980	)		(2,964	)
Total long-term debt	$	650,989		$	667,943

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Corporate Restructuring and Other Organizational Changes (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Components of Corporate Restructuring and Other Reorganization Activities from Acquisitions

The components of corporate restructuring and other reorganization activities from the acquisitions are included in the following table (in thousands):

	Facility Closures
Balance, December 31, 2016	$	4,559
Restructuring charges (adjustments) incurred, net		2,447
Amounts paid during the period		(1,285	)
Foreign currency translation adjustments		224
Balance, December 31, 2017	$	5,945
Amounts paid during the period		(1,732	)
Foreign currency translation adjustments		(86	)
Balance, December 31, 2018	$	4,127

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2018

Earnings Per Share [Abstract]

Reconciliation of Weighted Average Share Amounts used to Compute Both Basic and Diluted Earnings Per Share

The following table reconciles the weighted average share amounts used to compute both basic and diluted earnings per share (in thousands):

	Years Ended December 31,
	2018		2017		2016
Weighted average shares outstanding:
Basic weighted average shares outstanding		116,057		118,059		117,533
Add: Dilutive effect of stock options and RSUs		1,575		1,385		1,314
Diluted weighted average shares outstanding		117,632		119,444		118,847

Segment Information (Tables)

12 Months Ended

Dec. 31, 2018

Segment Reporting [Abstract]

Schedule of Selected Financial Data by Reportable Segment

The following is selected financial data for the Company’s reportable segments for the periods indicated (in thousands):

	Years Ended December 31 ,
	2018			2017			2016
Revenues
ACI On Premise	$	576,755		$	598,590		$	591,252
ACI On Demand		433,025			425,601			399,033
Corporate and other		—			—			15,416
Total revenue	$	1,009,780		$	1,024,191		$	1,005,701
Segment Adjusted EBITDA
ACI On Premise	$	323,902		$	347,094		$	312,188
ACI On Demand		12,015			(1,832	)		(2,624	)
Depreciation and amortization		(97,350	)		(102,224	)		(103,454	)
Stock-based compensation expense		(20,360	)		(13,683	)		(43,613	)
Corporate and unallocated expenses		(92,296	)		(144,715	)		58,633
Interest, net		(30,388	)		(38,449	)		(39,654	)
Other, net		(3,724	)		(2,619	)		4,105
Income before income taxes	$	91,799		$	43,572		$	185,581
Depreciation and amortization
ACI On Premise	$	11,634		$	13,094		$	14,581
ACI On Demand		31,541			34,171			29,385
Corporate		54,175			54,959			59,488
Total depreciation and amortization	$	97,350		$	102,224		$	103,454
Stock-based compensation expense
ACI On Premise	$	4,348		$	2,234		$	6,894
ACI On Demand		4,338			2,230			6,876
Corporate		11,674			9,219			29,843
Total stock-based compensation expense	$	20,360		$	13,683		$	43,613

Schedule of Revenue by Primary Geographic Markets and Primary Solution Categories

The following is revenue by primary geographic market and primary solution category for the Company’s reportable segments for the periods indicated (in thousands):

	Year Ended December 31, 2018						Year Ended December 31, 2017
	ACI On Premise		ACI On Demand		Total		ACI On Premise		ACI On Demand		Total
Primary Geographic Markets
Americas - United States	$	131,382	$	369,097	$	500,479	$	175,682	$	365,553	$	541,235
Americas - Other		61,969		9,577		71,546		72,802		9,429		82,231
EMEA		296,157		48,889		345,046		270,388		47,872		318,260
Asia Pacific		87,247		5,462		92,709		79,718		2,747		82,465
Total	$	576,755	$	433,025	$	1,009,780	$	598,590	$	425,601	$	1,024,191
Primary Solution Categories
Bill Payments	$	—	$	275,526	$	275,526	$	—	$	271,421	$	271,421
Digital Channels		35,231		40,342		75,573		47,973		46,063		94,036
Merchant Payments		30,153		59,789		89,942		26,430		50,523		76,953
Payments Intelligence		42,647		46,497		89,144		33,203		47,123		80,326
Real-Time Payments		92,068		2,193		94,261		70,087		2,785		72,872
Retail Payments		376,656		8,678		385,334		420,897		7,686		428,583
Total	$	576,755	$	433,025	$	1,009,780	$	598,590	$	425,601	$	1,024,191

	Year Ended December 31, 2016
	ACI On Premise		ACI On Demand		Other Corporate		Total
Primary Geographic Markets
Americas - United States	$	164,058	$	347,957	$	15,416	$	527,431
Americas - Other		110,463		6,255		—		116,718
EMEA		217,576		43,584		—		261,160
Asia Pacific		99,155		1,237		—		100,392
Total	$	591,252	$	399,033	$	15,416	$	1,005,701
Primary Solution Categories
Bill Payments	$	—	$	255,540	$	—	$	255,540
Digital Channels		49,617		59,597		15,416		124,630
Merchant Payments		29,311		35,315		—		64,626
Payments Intelligence		24,665		42,984		—		67,649
Real-Time Payments		70,289		705		—		70,994
Retail Payments		417,370		4,892		—		422,262
Total	$	591,252	$	399,033	$	15,416	$	1,005,701

Schedule of Long-lived Assets by Geographic Location

The following is the Company’s long-lived assets by geographic location for the periods indicated (in thousands):

	December 31 ,
	2018		2017
Long lived assets
United States	$	811,435	$	759,513
Other		717,495		613,556
	$	1,528,930	$	1,373,069

Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Stock Option Activity

A summary of stock option activity under the various stock incentive plans previously described is as follows:

Stock Options	Number of Shares			Weighted- Average Exercise Price ($)		Weighted- Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value of In-the-Money Options ($)
Outstanding, December 31, 2017		6,162,717		$	16.83
Granted		170,455			23.36
Exercised		(1,379,704	)		14.26
Forfeited		(88,632	)		18.56
Outstanding, December 31, 2018		4,864,836		$	17.76		6.09	$	48,214,530
Exercisable, December 31, 2018		3,416,715		$	17.04		5.43	$	36,309,807

Summary of Nonvested Restricted Share Awards

A summary of nonvested RSAs are as follows:

Nonvested Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2017		503,237		$	20.63
Vested		(231,473	)		21.20
Forfeited		(58,427	)		19.92
Nonvested at December 31, 2018		213,337		$	20.21

Black-Scholes Option-Pricing Model [Member]

Summary of Grant Date Fair Value Weighted-Average Assumptions, Options

	Years Ended December 31,
	2018			2017			2016
Expected life (years)		5.6			5.6			5.9
Risk-free interest rate		2.7	%		1.9	%		1.2	%
Expected volatility		26.4	%		29.4	%		29.7	%
Expected dividend yield		—			—			—

Monte Carlo Simulation Model [Member]

Summary of Grant Date Fair Value Weighted-Average Assumptions, Options

With respect to supplemental stock options granted that vest based on the achievement of certain market conditions, the grant date fair value was estimated using a Monte Carlo simulation model with the following weighted-average assumptions:

	Year Ended
	December 31, 2016
Expected life (years)		7.5
Risk-free interest rate		1.6	%
Expected volatility		41.6	%
Expected dividend yield		—

LTIP Performance Shares [Member]

Summary of Nonvested Performance Award Activity

A summary of the nonvested LTIP performance shares are as follows:

Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested at December 31, 2017		1,125,035		$	18.94
Forfeited		(93,147	)		19.26
Change in expected attainment for 2016 grants		(491,191	)		17.91
Nonvested at December 31, 2018		540,697		$	19.83

Total Shareholder Return Awards (TSRs) [Member]

Summary of Nonvested Performance Award Activity

A summary of nonvested TSRs are as follows:

Nonvested Total Shareholder Return Awards	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		143,649		$	24.37
Granted		541,214			31.31
Forfeited		(42,855	)		30.19
Change in attainment		76,923			24.37
Nonvested as of December 31, 2018		718,931		$	29.25

Total Shareholder Return Awards (TSRs) [Member] | Monte Carlo Simulation Model [Member]

Summary of Nonvested Performance Award Activity

The grant date fair value of the TSRs was estimated using the following weighted-average assumptions:

	Years Ended December 31,
	2018			2017
Expected life (years)		2.9			2.9
Interest rate		2.4	%		1.5	%
Volatility		28.0	%		26.5	%
Dividend Yield		—			—

Performance-Based Restricted Share Awards (PBRSAs) [Member]

Summary of Nonvested Performance Award Activity

Nonvested Performance-Based Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		173,636		$	24.41
Vested		(173,636	)		24.41
Nonvested as of December 31, 2018		—		$	—

Restricted Share Units (RSUs) [Member]

Summary of Nonvested Restricted Share Unit Activity

A summary of nonvested RSUs are as follows:

Nonvested Restricted Share Units	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2017		—		$	—
Granted		714,123			23.81
Vested		(10,000	)		25.72
Forfeited		(53,078	)		23.36
Nonvested as of December 31, 2018		651,045		$	23.82

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2018

Income Tax Disclosure [Abstract]

Components of Income Before Income Taxes

For financial reporting purposes, income before income taxes includes the following components (in thousands):


	Years Ended December 31,
	2018		2017			2016
United States	$	16,312	$	(42,863	)	$	134,740
Foreign		75,487		86,435			50,841

Total	$	91,799	$	43,572		$	185,581

Income Tax Expense (Benefit)

The expense (benefit) for income taxes consists of the following (in thousands):


	Years Ended December 31,
	2018			2017			2016
Federal
Current	$	6,545		$	2,586		$	14,108
Deferred		(6,587	)		19,212			19,034

Total		(42	)		21,798			33,142
State
Current		4,441			(1,857	)		12,565
Deferred		(2,649	)		(1,324	)		(2,502	)

Total		1,792			(3,181	)		10,063
Foreign
Current		17,626			16,048			11,671
Deferred		3,502			3,772			1,170

Total		21,128			19,820			12,841

Total	$	22,878		$	38,437		$	56,046

Summary of Differences Between Income Tax Expense Computed at Statutory Federal Income Tax Rate and Per Consolidated Statements of Operations

Differences between the income tax expense computed at the statutory federal income tax rate and per the consolidated statements of operations are summarized as follows (in thousands):


	Years Ended December 31,
	2018			2017			2016
Tax expense at federal rate of 21% (35% pre-2018)	$	19,278		$	15,250		$	64,953
State income taxes, net of federal benefit		5,246			(2,238	)		7,060
Change in valuation allowance		12,657			(1,884	)		(8,524	)
Foreign tax rate differential		(4,796	)		(15,622	)		(11,830	)
Unrecognized tax benefit increase		1,262			3,007			1,045
Tax effect of foreign operations		8,546			5,532			5,988
Tax benefit of research & development		(2,557	)		(1,904	)		(1,088	)
Transition tax		(8,112	)		20,867			—
Revaluation of deferred tax balances		(4,937	)		14,953			—
Performance-based compensation		(4,541	)		2,081			—
Domestic production activities		—			(3,793	)		(700	)
Other		832			2,188			(858	)

Income tax provision	$	22,878		$	38,437		$	56,046

Summary of Deferred Tax Assets and Liabilities


	December 31,
	2018			2017
Deferred income tax assets:
Net operating loss carryforwards	$	25,745		$	38,419
Tax credits		43,838			37,305
Compensation		15,934			18,124
Deferred revenue		27,587			22,248
Research and development expense deferral		12,631			—
Other		5,393			9,055

Gross deferred income tax assets		131,128			125,151
Less: valuation allowance		(20,415	)		(7,808	)

Net deferred income tax assets	$	110,713		$	117,343

Deferred income tax liabilities:
Depreciation and amortization	$	(60,872	)	$	(67,504	)
Deferred revenue		(54,508	)		—

Total deferred income tax liabilities		(115,380	)		(67,504	)

Net deferred income taxes	$	(4,667	)	$	49,839

Deferred income taxes / liabilities included in the balance sheet are:
Deferred income tax asset – noncurrent	$	27,048		$	66,749
Deferred income tax liability – noncurrent		(31,715	)		(16,910	)

Net deferred income taxes	$	(4,667	)	$	49,839

Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits

A reconciliation of the beginning and ending amount of unrecognized tax benefits for the years ended December 31 is as follows (in thousands):


	2018			2017			2016
Balance of unrecognized tax benefits at beginning of year	$	27,237		$	24,278		$	21,079
Increases for tax positions of prior years		315			2,478			58
Decreases for tax positions of prior years		(61	)		(114	)		(361	)
Increases for tax positions established for the current period		1,185			1,677			5,185
Decreases for settlements with taxing authorities		—			(154	)		(167	)
Reductions resulting from lapse of applicable statute of limitation		(115	)		(1,155	)		(1,310	)
Adjustment resulting from foreign currency translation		(155	)		227			(206	)

Balance of unrecognized tax benefits at end of year	$	28,406		$	27,237		$	24,278

Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Aggregate Minimum Operating Lease Payments

Aggregate minimum operating lease payments under these agreements in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Operating Leases
2019	$	16,925
2020		14,212
2021		10,538
2022		8,178
2023		6,529
Thereafter		21,196
Total minimum lease payments	$	77,578

Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Activity within Accumulated Other Comprehensive Loss

	Accumulated Other Comprehensive Loss
Balance at December 31, 2015	$	(71,576	)
Other comprehensive loss		(22,524	)
Balance at December 31, 2016		(94,100	)
Other comprehensive income		16,744
Balance at December 31, 2017		(77,356	)
Other comprehensive loss		(15,261	)
Balance at December 31, 2018	$	(92,617	)

Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

	Quarter Ended												Year Ended
	March 31,			June 30,			September 30,			December 31,			December 31,
(in thousands, except per share amounts)	2018			2018			2018			2018			2018
Revenues:
Software as a service and platform as a service	$	104,280		$	113,600		$	104,519		$	110,626		$	433,025
License		28,046			45,555			68,964			137,991			280,556
Maintenance		56,659			55,048			54,373			53,065			219,145
Services		20,325			20,792			17,669			18,268			77,054
Total revenues		209,310			234,995			245,525			319,950			1,009,780
Operating expenses:
Cost of revenue (1)		107,336			116,261			102,473			104,281			430,351
Research and development		36,791			37,862			36,008			32,969			143,630
Selling and marketing		31,893			33,160			28,252			24,576			117,881
General and administrative		28,649			28,837			29,537			20,399			107,422
Depreciation and amortization		21,345			21,033			20,896			21,311			84,585
Total operating expenses		226,014			237,153			217,166			203,536			883,869
Operating income (loss)		(16,704	)		(2,158	)		28,359			116,414			125,911
Other income (expense):
Interest expense		(9,365	)		(9,717	)		(12,573	)		(9,875	)		(41,530	)
Interest income		2,744			2,742			2,763			2,893			11,142
Other, net		(55	)		(1,677	)		(1,304	)		(688	)		(3,724	)
Total other income (expense)		(6,676	)		(8,652	)		(11,114	)		(7,670	)		(34,112	)
Income (loss) before income taxes		(23,380	)		(10,810	)		17,245			108,744			91,799
Income tax expense (benefit)		(3,952	)		3,764			2,012			21,054			22,878
Net income (loss)	$	(19,428	)	$	(14,574	)	$	15,233		$	87,690		$	68,921
Earnings (loss) per share
Basic	$	(0.17	)	$	(0.13	)	$	0.13		$	0.76		$	0.59
Diluted	$	(0.17	)	$	(0.13	)	$	0.13		$	0.74		$	0.59

(1)	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.

	Quarter Ended												Year Ended
	March 31,			June 30,			September 30,			December 31,			December 31,
(in thousands, except per share amounts)	2017			2017			2017			2017			2017
Revenues:
Software as a service and platform as a service	$	99,447		$	113,469		$	99,761		$	112,895		$	425,572
License		59,381			54,180			50,017			129,546			293,124
Maintenance		54,471			56,009			56,349			55,242			222,071
Services		18,163			16,941			19,608			28,712			83,424
Total revenues		231,462			240,599			225,735			326,395			1,024,191
Operating expenses:
Cost of revenue (1)		108,543			120,357			107,393			115,993			452,286
Research and development		37,285			34,969			33,935			30,732			136,921
Selling and marketing		27,137			28,817			25,236			26,695			107,885
General and administrative (2)		32,503			72,527			25,302			22,700			153,032
Depreciation and amortization		22,371			22,372			22,446			22,238			89,427
Total operating expenses		227,839			279,042			214,312			218,358			939,551
Operating income (loss)		3,623			(38,443	)		11,423			108,037			84,640
Other income (expense):
Interest expense		(10,160	)		(10,664	)		(9,374	)		(8,815	)		(39,013	)
Interest income		106			150			165			143			564
Other, net		649			(1,766	)		(1,059	)		(443	)		(2,619	)
Total other income (expense)		(9,405	)		(12,280	)		(10,268	)		(9,115	)		(41,068	)
Income (loss) before income taxes		(5,782	)		(50,723	)		1,155			98,922			43,572
Income tax expense (benefit)		(4,174	)		(20,914	)		(2,233	)		65,758			38,437
Net income (loss)	$	(1,608	)	$	(29,809	)	$	3,388		$	33,164		$	5,135
Earnings (loss) per share
Basic	$	(0.01	)	$	(0.25	)	$	0.03		$	0.28		$	0.04
Diluted	$	(0.01	)	$	(0.25	)	$	0.03		$	0.28		$	0.04

(1)	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.
(2)	General and administrative expenses in the second quarter includes the BHMI judgment.

Nature of Business and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Amount of off balance sheet settlement funds	$ 256,500,000		$ 238,900,000
Goodwill measurement period	1 year
Cumulative effect on retained earnings	$ 243,981,000	$ (99,000)
Undiscounted minimum commitments under noncancelable operating leases	77,578,000
Goodwill	909,691,000		$ 909,691,000
ACI On Premise [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	725,900,000
ACI On Demand [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	$ 183,800,000
Minimum [Member] \| Internal-Use Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Maximum [Member] \| Internal-Use Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	10 years
Accounting Standards Update 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect on retained earnings	$ 244,000,000
Accounting Standards Update 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Undiscounted minimum commitments under noncancelable operating leases	$ 77,600,000
Expected operating lease liability and ROU asset ranges, description	Based on currently available information, the Company expects to recognize operating lease liabilities and ROU assets of $65 million – $75 million and $60 million – $70 million, respectively
Accounting Standards Update 2016-02 [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Expected operating lease liability	$ 65,000,000
Expected right-of-use asset (ROU)	60,000,000
Accounting Standards Update 2016-02 [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Expected operating lease liability	75,000,000
Expected right-of-use asset (ROU)	$ 70,000,000
Other Intangible Assets [Member] \| Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Other Intangible Assets [Member] \| Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	20 years
Level 2 [Member]
Summary Of Significant Accounting Policies [Line Items]
Stated interest rate of Senior Notes	5.75%		6.375%
Level 2 [Member] \| Senior Notes [Member] \| 5.750% Senior Notes due 2026 [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair value of long-term debt	$ 395,000,000
Level 2 [Member] \| Senior Notes [Member] \| 6.375% Senior Note due 2020 [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair value of long-term debt			$ 305,700,000

Nature of Business and Summary of Significant Accounting Policies - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Other Current Assets and Liabilities [Line Items]
Other	$ 7,574	$ 5,781
Total other current assets	39,830	58,126
Settlement payables	31,605	48,953
Accrued interest	8,407	7,291
Vendor financed licenses	3,551	1,862
Royalties payable	11,318	9,264
Other	33,173	35,534
Total other current liabilities	88,054	102,904
Settlement deposits [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	23,651	22,282
Settlement receivables [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	$ 8,605	$ 30,063

Nature of Business and Summary of Significant Accounting Policies - Net Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 190,121	$ 182,762
Less: accumulated depreciation	(117,392)	(102,534)
Property and equipment, net	72,729	80,228
Computer and office equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 129,359	123,804
Computer and office equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Lives	3 years
Computer and office equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Lives	5 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Useful Lives, description	Lesser of useful life of improvement or remaining life of lease
Property and equipment, gross	$ 32,096	32,364
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Useful Lives	7 years
Property and equipment, gross	$ 12,500	12,158
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 14,381	12,651
Building and improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Lives	7 years
Building and improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Lives	30 years
Land [Member]
Property, Plant and Equipment [Line Items]
Useful Lives, description	Non depreciable
Property and equipment, gross	$ 1,785	$ 1,785

Revenue - Additional Information (Detail) $ in Millions	12 Months Ended
Revenue - Additional Information (Detail) $ in Millions	Dec. 31, 2018 USD ($)
Revenue [Line Items]
Software licensing arrangements warranty, description	The Company's software license arrangements typically provide the customer with a standard 90-day assurance-type warranty.
Software licensing arrangements warranty period	90 days
Initial post contract customer support period	1 year
Percentage of receivables as of December 31, 2018 or December 31, 2017	No customer accounted for more than 10% of the Company’s consolidated receivables balance as of December 31, 2018 and 2017.
Revenue allocated to remaining performance obligations	$ 666.4
Percentage of revenue allocated to remaining performance obligations to be recognized over the next 12 months	48.00%
Capitalized sales commissions minimum amortization period	1 year
Performance obligation satisfied in previous period	$ 29.6
Selling and Marketing [Member]
Revenue [Line Items]
Amortization of capitalized sales commissions	8.4
Cost of Revenue [Member]
Revenue [Line Items]
Amortization of capitalized contract costs	4.7
Other Current Assets [Member]
Revenue [Line Items]
Capitalized sales commissions	1.3
Capitalized contract costs, current	0.2
Other Noncurrent Assets [Member]
Revenue [Line Items]
Capitalized sales commissions	11.7
Capitalized contract costs, noncurrent	$ 12.6

Revenue - Receivables and Concentration of Credit Risk (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Billed receivables	$ 239,275	$ 240,137
Allowance for doubtful accounts	(3,912)	(4,799)	$ (3,873)	$ (5,045)
Billed receivables, net	235,363	235,338
Accrued receivables	336,858	27,507
Significant financing component	(35,029)
Total accrued receivables, net	301,829	27,507
Less current accrued receivables	123,053	27,507
Less current significant financing component	(10,234)
Total long-term accrued receivables, net	189,010
Total receivables, net	$ 537,192	$ 262,845

Revenue - Activity in Allowance for Doubtful Accounts Receivable (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Balance, beginning of period	$ (4,799)	$ (3,873)	$ (5,045)
Provision increase	(1,505)	(2,086)	(1,595)
Amounts written off, net of recoveries	2,269	1,305	2,551
Foreign currency translation adjustments and other	123	(145)	216
Balance, end of period	$ (3,912)	$ (4,799)	$ (3,873)

Revenue - Changes in Deferred Revenue (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Deferred Revenue Disclosure [Abstract]
Deferred revenue, beginning balance	$ 145,344
Deferral of revenue	215,188
Recognition of deferred revenue	(200,061)
Foreign currency translation	(4,336)
Deferred revenue, ending balance	$ 156,135

Revenue - Financial Statement Effect of Applying ASC 606 (Balance Sheet) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Receivables, net of allowances	$ 348,182	$ 262,845
Recoverable income taxes	6,686	7,921
Prepaid expenses	23,277	23,219
Other current assets	39,830	58,126
Accrued receivables, net	189,010
Deferred income taxes, net	27,048	66,749
Other noncurrent assets	52,145	36,483
Liabilities
Deferred revenue	104,843	107,543
Income taxes payable	5,239	9,898
Other current liabilities	88,054	102,904
Deferred income taxes, net	31,715	16,910
Stockholders' equity
Total stockholders' equity	1,048,231	$ 764,597	$ 754,917	$ 654,400
Without Application of ASC 606 [Member]
Assets
Receivables, net of allowances	272,409
Recoverable income taxes	13,539
Prepaid expenses	24,018
Other current assets	38,717
Deferred income taxes, net	61,554
Other noncurrent assets	41,590
Liabilities
Deferred revenue	134,565
Income taxes payable	5,472
Other current liabilities	88,288
Deferred income taxes, net	10,178
Stockholders' equity
Total stockholders' equity	805,228
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member]
Assets
Receivables, net of allowances	75,773
Recoverable income taxes	(6,853)
Prepaid expenses	(741)
Other current assets	1,113
Accrued receivables, net	189,010
Deferred income taxes, net	(34,506)
Other noncurrent assets	10,555
Liabilities
Deferred revenue	(29,722)
Income taxes payable	(233)
Other current liabilities	(234)
Deferred income taxes, net	21,537
Stockholders' equity
Total stockholders' equity	$ 243,003

Revenue - Financial Statement Effect of Applying ASC 606 (Income Statement) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues
Total revenues	$ 319,950	$ 245,525	$ 234,995	$ 209,310	$ 326,395	$ 225,735	$ 240,599	$ 231,462	$ 1,009,780	$ 1,024,191	$ 1,005,701
Operating expenses
Selling and marketing	24,576	28,252	33,160	31,893	26,695	25,236	28,817	27,137	117,881	107,885	118,082
Other income (expense)
Interest income	2,893	2,763	2,742	2,744	143	165	150	106	11,142	564	530
Other, net	(688)	(1,304)	(1,677)	(55)	(443)	(1,059)	(1,766)	649	(3,724)	(2,619)	4,105
Income tax provision
Income tax expense (benefit)	21,054	2,012	3,764	(3,952)	65,758	(2,233)	(20,914)	(4,174)	22,878	38,437	56,046
Software as a service and platform as a service [Member]
Revenues
Total revenues	110,626	104,519	113,600	104,280	112,895	99,761	113,469	99,447	433,025	425,572	411,289
License [Member]
Revenues
Total revenues	137,991	68,964	45,555	28,046	129,546	50,017	54,180	59,381	280,556	293,124	273,466
Maintenance [Member]
Revenues
Total revenues	$ 53,065	$ 54,373	$ 55,048	$ 56,659	$ 55,242	$ 56,349	$ 56,009	$ 54,471	219,145	$ 222,071	$ 233,476
Services [Member]
Revenues
Total revenues									77,054
Without Application of ASC 606 [Member]
Operating expenses
Selling and marketing									110,417
Other income (expense)
Interest income									831
Other, net									(3,274)
Income tax provision
Income tax expense (benefit)									22,981
Without Application of ASC 606 [Member] \| Software as a service and platform as a service [Member]
Revenues
Total revenues									432,095
Without Application of ASC 606 [Member] \| License [Member]
Revenues
Total revenues									281,355
Without Application of ASC 606 [Member] \| Maintenance [Member]
Revenues
Total revenues									221,189
Without Application of ASC 606 [Member] \| Services [Member]
Revenues
Total revenues									77,595
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member]
Operating expenses
Selling and marketing									7,464
Other income (expense)
Interest income									10,311
Other, net									(450)
Income tax provision
Income tax expense (benefit)									(103)
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member] \| Software as a service and platform as a service [Member]
Revenues
Total revenues									930
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member] \| License [Member]
Revenues
Total revenues									(799)
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member] \| Maintenance [Member]
Revenues
Total revenues									(2,044)
Effect of Change - Higher/(Lower) [Member] \| Accounting Standards Update 2014-09 [Member] \| Services [Member]
Revenues
Total revenues									$ (541)

Divestiture - Additional Information (Detail) - Community Financial Services Products [Member] - Disposal Group, Not Discontinued Operations [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 03, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration related to disposal		$ 200.0
Net after-tax gain on the sale of assets	$ 93.4
Adjustment to Gain Loss on Sale of Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net after-tax gain on the sale of assets	$ 0.5

Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 137,228	$ 155,386
Software, accumulated amortization	252,200	230,700
Other intangible assets amortization expense	19,000	19,400	$ 21,200
Software Marketed for Resale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	27,500	40,900
Software, amortization expense	$ 12,800	12,800	13,900
Software Marketed for Resale [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Software Marketed for Resale [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Software Acquired or Developed for Internal Use [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 109,700	114,500
Software, amortization expense	$ 41,700	$ 45,200	$ 45,700
Software Acquired or Developed for Internal Use [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Software Acquired or Developed for Internal Use [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years

Software and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 314,339	$ 321,864
Accumulated Amortization	(146,212)	(130,583)
Net Balance	168,127	191,281
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	297,991	305,218
Accumulated Amortization	(131,187)	(116,677)
Net Balance	166,804	188,541
Trademarks and Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,348	16,646
Accumulated Amortization	(15,025)	(13,906)
Net Balance	$ 1,323	$ 2,740

Software and Other Intangible Assets - Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Net Balance	$ 168,127	$ 191,281
Software [Member]
Finite-Lived Intangible Assets [Line Items]
2019	49,229
2020	39,014
2021	25,382
2022	12,228
2023	6,349
Thereafter	5,026
Net Balance	137,228
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
2019	21,825
2020	20,944
2021	20,451
2022	20,303
2023	20,000
Thereafter	64,604
Net Balance	$ 168,127

Debt - Additional Information (Detail) - USD ($) $ in Thousands			12 Months Ended
	Aug. 21, 2018	Feb. 24, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Proceeds from revolving credit facility			$ 109,000	$ 67,000	$ 76,000
Proceeds from term portion of credit agreement				415,000
Credit facility, interest rate description			Based on the calculation of the applicable consolidated total leverage ratio
Credit facility, interest rate margin above federal fund rate			1.00%
Credit facility, interest rate margin above one-month LIBOR rate			1.00%
Credit facility, borrowing rate			4.27%
Debt Issuance cost			$ 13,203	10,521
Debt Issuance cost paid			$ 7,319	$ 5,340	$ 655
Credit Facility maturity date			Feb. 24, 2022
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unused borrowings			$ 500,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Term Credit Facility amount outstanding			285,000
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes amount outstanding			400,000
Senior Notes 2026 [Member]
Debt Instrument [Line Items]
Senior notes amount outstanding	$ 400,000
Issue price percentage of senior notes of the principal amount	100.00%
Percentage of interest rate on notes	5.75%
Senior Notes maturity date	Aug. 15, 2026
Debt Issuance cost			7,300
Debt Issuance cost paid			$ 7,300
Maturity date of senior notes			Aug. 15, 2026
Credit Agreement [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Credit facility, interest rate margin above base rate			0.25%
Credit facility, interest rate margin above LIBOR rate			1.25%
Credit Agreement [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Credit facility, interest rate margin above base rate			1.25%
Credit facility, interest rate margin above LIBOR rate			2.25%
Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity		$ 500,000
Credit facilities, maturity		5 years
Proceeds from revolving credit facility		$ 12,000
Credit Agreement [Member] \| Term Credit Facility [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity		$ 415,000
Credit facilities, maturity		5 years
Proceeds from term portion of credit agreement		$ 415,000
Multi-year License Agreement [Member]
Debt Instrument [Line Items]
Financed internally-used software			$ 11,900
Annual payments due date			through June 2023
Other current liabilities			$ 2,500
Other non-current liabilities			6,900
Outstanding other Long-term Debt			$ 9,400
Parent Company and Domestic Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			100.00%
Foreign Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			65.00%

Debt - Maturities on Long-Term Debt Outstanding (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Debt Disclosure [Abstract]
2019	$ 23,747
2020	23,747
2021	31,662
2022	205,803
2023	0
Thereafter	400,000
Total	$ 684,959

Debt - Carrying Value of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt issuance costs	$ (13,203)	$ (10,521)
Total debt	671,756	685,729
Current portion of long-term debt	20,767	17,786
Less current portion of debt issuance costs	(2,980)	(2,964)
Total long-term debt	650,989	667,943
5.75% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Total debt	400,000
6.375% Senior Notes, due August 2020 [Member]
Debt Instrument [Line Items]
Total debt		300,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	284,959	394,250
Current portion of long-term debt	$ 23,747	20,750
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt		$ 2,000

Debt - Carrying Value of Debt (Parenthetical) (Detail)	12 Months Ended
Debt - Carrying Value of Debt (Parenthetical) (Detail)	Dec. 31, 2018
5.75% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Percentage of interest rate on notes	5.75%
Maturity date of senior notes	Aug. 15, 2026
6.375% Senior Notes, due August 2020 [Member]
Debt Instrument [Line Items]
Percentage of interest rate on notes	6.375%
Maturity date of senior notes	Aug. 15, 2020

Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018
Facility Closures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 5,945	$ 4,559	$ 4,127
Facility Closures [Member] \| Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			1,600
Facility Closures [Member] \| Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 2,500
General and Administrative Expense [Member] \| Leased Facilities in Edison, NJ; Chantilly, VA; Charlotte, NC; Parsippany, NJ; and Waltham, MA [Member]
Restructuring Cost and Reserve [Line Items]
Lease termination fee	$ 2,400
General and Administrative Expense [Member] \| Leased Facilities in Watford, UK; Providence, RI; Chantilly, VA; and West Hills, CA [Member]
Restructuring Cost and Reserve [Line Items]
Lease termination fee		$ 5,000

Corporate Restructuring and Other Organizational Changes - Components of Corporate Restructuring and Other Reorganization Activities from Recent Acquisitions (Detail) - Facility Closures [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 5,945	$ 4,559
Restructuring charges (adjustments) incurred, net		2,447
Amounts paid during the period	(1,732)	(1,285)
Foreign currency translation adjustments	(86)	224
Ending balance	$ 4,127	$ 5,945

Common Stock and Treasury Stock - Additional Information (Detail) - USD ($)	12 Months Ended			76 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Feb. 28, 2018
Stock authorized to purchase under stock repurchase program					$ 200,000,000
Repurchase of common stock, shares	2,346,427	1,653,573	3,020,926	44,129,393
Repurchase of common stock, value	$ 54,527,000	$ 37,387,000	$ 60,089,000	$ 547,800,000
Number shares issued pursuant to stock option exercises	1,379,704
Stock Options [Member]
Number shares issued pursuant to stock option exercises	1,379,704	1,204,559	797,140
Restricted Share Awards (RSAs) [Member]
Stock issued during the period restricted share awards		560,174	148,322
Retention RSAs [Member]
Stock issued during the period restricted share awards			470,029
Restricted Share Units [Member]
Stock issued during the period restricted share awards	10,000
Maximum [Member]
Remaining value of shares authorized for purchase under the stock repurchase program	$ 176,600,000	$ 176,600,000		$ 176,600,000

Earnings Per Share - Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Weighted average shares outstanding:
Basic weighted average shares outstanding	116,057	118,059	117,533
Add: Dilutive effect of stock options and RSUs	1,575	1,385	1,314
Diluted weighted average shares outstanding	117,632	119,444	118,847

Earnings Per Share - Additional Information (Detail) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Options to purchase shares and contingently issuable shares excluded from diluted earnings per share computation	2,200,000	3,900,000	6,100,000
Common stock outstanding	116,123,361	117,096,731

Other, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Income and Expenses [Abstract]
Foreign currency transaction gains (losses)	$ (3.7)	$ (2.6)	$ 4.1

Segment Information Selected Segment Financial Data, Revenues and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues									$ 1,009,780	$ 1,024,191	$ 1,005,701
Depreciation and amortization expense									97,350	102,224	103,454
Stock-based compensation expense									20,360	13,683	43,613
Corporate and unallocated expenses									(92,296)	(144,715)	58,633
Interest, net									(30,388)	(38,449)	(39,654)
Other, net	$ (688)	$ (1,304)	$ (1,677)	$ (55)	$ (443)	$ (1,059)	$ (1,766)	$ 649	(3,724)	(2,619)	4,105
Income before income taxes	$ 108,744	$ 17,245	$ (10,810)	$ (23,380)	$ 98,922	$ 1,155	$ (50,723)	$ (5,782)	91,799	43,572	185,581
ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues									576,755	598,590	591,252
ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues									433,025	425,601	399,033
Operating Segments [Member] \| ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues									576,755	598,590	591,252
Segment Adjusted EBITDA									323,902	347,094	312,188
Depreciation and amortization expense									11,634	13,094	14,581
Stock-based compensation expense									4,348	2,234	6,894
Operating Segments [Member] \| ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues									433,025	425,601	399,033
Segment Adjusted EBITDA									12,015	(1,832)	(2,624)
Depreciation and amortization expense									31,541	34,171	29,385
Stock-based compensation expense									4,338	2,230	6,876
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues											15,416
Depreciation and amortization expense									54,175	54,959	59,488
Stock-based compensation expense									$ 11,674	$ 9,219	$ 29,843

Segment Information Selected Segment Financial Data, Revenues and Long lived Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,009,780	$ 1,024,191	$ 1,005,701
Long lived assets
Long lived assets	1,528,930	1,373,069
Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	275,526	271,421	255,540
Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	75,573	94,036	124,630
Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	89,942	76,953	64,626
Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	89,144	80,326	67,649
Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	94,261	72,872	70,994
Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	385,334	428,583	422,262
ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	576,755	598,590	591,252
ACI On Premise [Member] \| Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	35,231	47,973	49,617
ACI On Premise [Member] \| Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	30,153	26,430	29,311
ACI On Premise [Member] \| Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	42,647	33,203	24,665
ACI On Premise [Member] \| Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	92,068	70,087	70,289
ACI On Premise [Member] \| Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	376,656	420,897	417,370
ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	433,025	425,601	399,033
ACI On Demand [Member] \| Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	275,526	271,421	255,540
ACI On Demand [Member] \| Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	40,342	46,063	59,597
ACI On Demand [Member] \| Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	59,789	50,523	35,315
ACI On Demand [Member] \| Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	46,497	47,123	42,984
ACI On Demand [Member] \| Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,193	2,785	705
ACI On Demand [Member] \| Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,678	7,686	4,892
Corporate and Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			15,416
Corporate and Other [Member] \| Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			15,416
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	500,479	541,235	527,431
Long lived assets
Long lived assets	811,435	759,513
United States [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	131,382	175,682	164,058
United States [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	369,097	365,553	347,957
United States [Member] \| Corporate and Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues			15,416
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	71,546	82,231	116,718
Long lived assets
Long lived assets	717,495	613,556
Other [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	61,969	72,802	110,463
Other [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,577	9,429	6,255
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	345,046	318,260	261,160
EMEA [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	296,157	270,388	217,576
EMEA [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	48,889	47,872	43,584
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	92,709	82,465	100,392
Asia Pacific [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	87,247	79,718	99,155
Asia Pacific [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 5,462	$ 2,747	$ 1,237

Segment Information - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues	$ 319,950	$ 245,525	$ 234,995	$ 209,310	$ 326,395	$ 225,735	$ 240,599	$ 231,462	$ 1,009,780	$ 1,024,191	$ 1,005,701
Operating income	$ 116,414	$ 28,359	$ (2,158)	$ (16,704)	$ 108,037	$ 11,423	$ (38,443)	$ 3,623	$ 125,911	84,640	221,130
BHMI judgment and related fees										48,100
General and Administrative Expense [Member]
Segment Reporting Information [Line Items]
BHMI judgment and related fees										$ 46,700
Community Financial Services Products [Member] \| Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Revenues											15,400
Operating income											$ 151,700
Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Description of customer revenue accounted for more than 10% of consolidated revenue									No single customer accounted for more than 10% of the Company’s consolidated revenues during the years ended December 31, 2018, 2017, and 2016.
Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Description of customer revenue accounted for more than 10% of consolidated revenue									No other country outside the United States accounted for more than 10% of the Company’s consolidated revenues during the years ended December 31, 2018, 2017, and 2016.

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended			12 Months Ended
	Sep. 15, 2015	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jun. 14, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP					148,520	158,194	188,453
Stock-based compensation expense					$ 20,360,000	$ 13,683,000	$ 43,613,000
Awards granted requisite service period					3 years
Incentive plan, weighted-average grant date fair value of stock options granted					$ 7.03	$ 6.24	$ 5.59
Incentive plan, total intrinsic value of stock options exercised					$ 15,800,000	$ 13,400,000	$ 6,800,000
Stock-based compensation expenses tax benefits					$ 0	1,700,000	14,300,000
Employee Stock Purchase Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance		3,000,000			3,000,000
Permitted designation for purchase of common stock under ESPP					Participating employees are permitted to designate up to the lesser of $25,000 or 10% of their annual base compensation for the purchase of common stock under the ESPP. Purchases under the ESPP are made one calendar month after the end of each fiscal quarter.
Employee participating annual base compensation designated for purchase of common stock, amount		$ 25,000			$ 25,000
Employee participating annual base compensation designated for purchase of common stock, percent		10.00%			10.00%
Price of common stock purchased under ESPP, percent					85.00%
Discount offered pursuant to ESPP, percentage					15.00%
Stock-based compensation expense					$ 500,000	$ 500,000	$ 500,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		$ 1,900,000			$ 1,900,000
Unrecognized compensation costs, weighted-average recognition periods					10 months 24 days
Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, trading price percentage							133.00%
Consecutive trading days							20 days
Share-based compensation, non-vested grant date fair value							$ 7.46
Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, trading price percentage							167.00%
Consecutive trading days							20 days
Share-based compensation, non-vested grant date fair value							$ 7.06
Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, trading price percentage							200.00%
Consecutive trading days							20 days
Share-based compensation, non-vested grant date fair value							$ 6.50
Restricted Share Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted requisite service period						3 years	3 years
Award vesting period						1 year
Number of shares vested					231,473
Shares withheld to pay employees' portion of minimum payroll withholding taxes					41,973
Award vesting percentage for each year					33.00%	33.00%	33.00%
Unrecognized compensation costs		2,500,000			$ 2,500,000
Unrecognized compensation costs, weighted-average recognition periods					1 year 2 months 12 days
Performance-Based Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year 3 months 18 days
Number of shares vested					173,636
Shares withheld to pay employees' portion of minimum payroll withholding taxes					64,699
Threshold level percentage for share awards				150.00%				150.00%
Performance-Based Restricted Share Awards [Member] \| Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage							90.40%
Restricted share awards, vesting increments on anniversary dates of grants								33.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share awards, vesting increments on anniversary dates of grants								33.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Two [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				98.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Two [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				100.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share awards, vesting increments on anniversary dates of grants								33.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Three [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				98.00%
Performance-Based Restricted Share Awards [Member] \| Tranche Three [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				100.00%
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested					10,000
Unrecognized compensation costs		$ 10,800,000			$ 10,800,000
Unrecognized compensation costs, weighted-average recognition periods					2 years 1 month 6 days
Restricted share awards, vesting increments on anniversary dates of grants					33.00%
2015 Grant [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage			0.00%
2015 Grant [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage			100.00%
2016 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage			65.00%
2016 Grant [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage		0.00%
2016 Grant [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage		65.00%
2017 Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage			100.00%
2016 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance		8,000,000			8,000,000
2016 Incentive Plan [Member] \| Stock Options, Stock Appreciation Rights, Restricted Stock, Restricted Stock Units and Other Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of Common Stock a participant may receive					3,000,000
2016 Incentive Plan [Member] \| Performance Shares or Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum aggregate value on the date of grant					$ 9,000,000
2005 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance									23,250,000
LTIP Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		$ 3,800,000			$ 3,800,000
Unrecognized compensation costs, weighted-average recognition periods					1 year 2 months 12 days
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation awards, award payout range, maximum		200.00%	200.00%		200.00%	200.00%	200.00%
Stock based compensation awards, award payout range, minimum					0.00%	0.00%	0.00%
Unrecognized compensation costs		$ 13,200,000			$ 13,200,000
Unrecognized compensation costs, weighted-average recognition periods					2 years

Stock-Based Compensation - Summary of Stock Option Activity (Detail)	12 Months Ended
	Dec. 31, 2018 USD ($) $ / shares shares
Number of Shares
Outstanding, Beginning Balance \| shares	6,162,717
Granted \| shares	170,455
Exercised \| shares	(1,379,704)
Forfeited \| shares	(88,632)
Outstanding, Ending Balance \| shares	4,864,836
Number of Shares Exercisable, Ending Balance \| shares	3,416,715
Weighted-Average Exercise Price
Beginning Balance \| $ / shares	$ 16.83
Granted \| $ / shares	23.36
Exercised \| $ / shares	14.26
Forfeited \| $ / shares	18.56
Ending Balance \| $ / shares	17.76
Weighted-Average Exercise Price Exercisable, Ending Balance \| $ / shares	$ 17.04
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	6 years 1 month 2 days
Weighted-Average Remaining Contractual Term (Years), Exercisable as of end of period	5 years 5 months 5 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period \| $	$ 48,214,530
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period \| $	$ 36,309,807

Stock-Based Compensation Plans - Grant Date Fair Value Weighted-Average Assumptions - Options (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield			0.00%
Black-Scholes Option-Pricing Model [Member] \| Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	5 years 7 months 6 days	5 years 7 months 6 days	5 years 10 months 24 days
Risk-free interest rate	2.70%	1.90%	1.20%
Expected volatility	26.40%	29.40%	29.70%
Monte Carlo Simulation Model [Member] \| Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)			7 years 6 months
Risk-free interest rate			1.60%
Expected volatility			41.60%

Stock-Based Compensation Plans - Summary of Nonvested LTIP Performance Shares (Detail) - LTIP Performance Shares [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Number of Shares at Expected Attainment
Beginning Balance \| shares	1,125,035
Forfeited \| shares	(93,147)
Change in expected attainment for 2016 grants \| shares	(491,191)
Ending Balance \| shares	540,697
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 18.94
Forfeited \| $ / shares	19.26
Change in expected attainment for 2016 grants \| $ / shares	17.91
Ending Balance \| $ / shares	$ 19.83

Stock-Based Compensation Plans - Summary of Nonvested RSAs (Detail) - Restricted Share Awards (RSAs) [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Number of Shares
Beginning Balance \| shares	503,237
Vested \| shares	(231,473)
Forfeited \| shares	(58,427)
Ending Balance \| shares	213,337
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 20.63
Vested \| $ / shares	21.20
Forfeited \| $ / shares	19.92
Ending Balance \| $ / shares	$ 20.21

Stock-Based Compensation Plans - Summary of Nonvested PBRSAs (Detail) - Performance-Based Restricted Share Awards [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Number of Shares
Beginning Balance \| shares	173,636
Vested \| shares	(173,636)
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 24.41
Vested \| $ / shares	$ 24.41

Stock-Based Compensation Plans - TSR Grant Date Fair Value Weighted-Average Assumptions (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend Yield			0.00%
Total Shareholder Return [Member] \| Monte Carlo Simulation Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	2 years 10 months 24 days	2 years 10 months 24 days
Interest rate	2.40%	1.50%
Volatility	28.00%	26.50%
Dividend Yield	0.00%	0.00%

Stock-Based Compensation Plans - Summary of Nonvested TSRs (Detail) - Total Shareholder Return [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Number of Shares at Expected Attainment
Beginning Balance \| shares	143,649
Granted \| shares	541,214
Forfeited \| shares	(42,855)
Change in attainment \| shares	76,923
Ending Balance \| shares	718,931
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 24.37
Granted \| $ / shares	31.31
Forfeited \| $ / shares	30.19
Change in attainment \| $ / shares	24.37
Ending Balance \| $ / shares	$ 29.25

Stock-Based Compensation Plans - Summary of Nonvested RSUs (Detail) - Restricted Share Units [Member]	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Number of Shares
Beginning Balance \| shares	0
Granted \| shares	714,123
Vested \| shares	(10,000)
Forfeited \| shares	(53,078)
Ending Balance \| shares	651,045
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 0
Granted \| $ / shares	23.81
Vested \| $ / shares	25.72
Forfeited \| $ / shares	23.36
Ending Balance \| $ / shares	$ 23.82

Employee Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Employees maximum 401(k) contribution, percentage	75.00%
Defined contribution plan, contribution	$ 6,400,000	$ 5,300,000	$ 5,500,000
Employer 401(k) matching contribution to employee, maximum amount	$ 5,000
Defined contribution plan, employer matching percentage on every deferred dollar	100.00%
EMEA Group
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, contribution	$ 1,600,000	$ 1,600,000	$ 1,700,000
Maximum [Member]
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Employer 401(k) matching contribution to employee percentage	4.00%
Employees under Age 50
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Employees maximum 401(k) contribution, amount	$ 18,500
Employees Aged 50 or Older
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Employees maximum 401(k) contribution, amount	$ 24,500
Employed at December 1, 2000 \| EMEA Group
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employer contribution percentage of eligible compensation minimum	8.50%
Employees aged over 55 years \| EMEA Group
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employer contribution percentage of eligible compensation maximum	15.50%
Employed subsequent to December 1, 2000 \| Maximum [Member] \| EMEA Group
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employer contribution percentage of eligible compensation	10.00%
Employed subsequent to December 1, 2000 \| Minimum [Member] \| EMEA Group
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Defined contribution plan, employer contribution percentage of eligible compensation	6.00%
Second Eligible Participant Contributions [Member]
Schedule Of Defined Contribution Plans Disclosures [Line Items]
Employer 401(k) matching contribution to employee percentage	4.00%
Defined contribution plan, employer matching percentage on every deferred dollar	50.00%

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Tax Cuts and Jobs Act of 2017, provisional tax charge		$ 15,000
Tax Cuts and Jobs Act of 2017, provisional tax charge, subsequent adjustment	$ 4,900
Increase in deferred tax assets valuation allowance	12,700
Unrecognized tax benefit	28,406	27,237	$ 24,278	$ 21,079
Net unrecognized tax benefits that, if recognized, would favorably impact the effective income tax rate	27,500	25,900
Decrease in unrecognized tax benefits due to the expiration of statutes of limitations and the settlement of various audits	3,900
Accrued interest and penalties related to income tax liabilities	1,200	1,200
Aggregate amount of interest and penalties expense (benefit) recorded in the statement of operations	$ 0	(800)	$ (200)
Tax Cuts and Jobs Act of 2017, one-time transition tax on certain unremitted foreign earnings		$ 20,900
Effective income tax rate	21.00%	35.00%
Deferred tax assets, valuation allowance	$ 20,415	$ 7,808
Tax expense for current impact of GILTI provisions	2,100
Tax Cuts and Jobs Act of 2017, one-time transition tax on certain unremitted foreign earnings, subsequent adjustment	8,100
Other Noncurrent Liabilities [Member]
Income Taxes [Line Items]
Unrecognized tax benefit	$ 22,600	$ 21,500
Foreign Entities
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiration period	17 years
Deferred tax assets operating loss carry forwards subject to expiration	$ 34,600
Tax credits expiration year	2022
Deferred tax assets operating loss carry forwards subject to expiration	$ 32,500
Valuation allowance against the tax benefit associated with NOLs	30,200
Valuation allowance against tax credit	$ 15,500
Foreign Entities \| Earliest Tax Year [Member]
Income Taxes [Line Items]
Tax years open for audit	2003
Foreign Entities \| Latest Tax Year [Member]
Income Taxes [Line Items]
Tax years open for audit	2017
Other Foreign Jurisdiction [Member]
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards, expiration period	7 years
Deferred tax assets operating loss carry forwards subject to expiration	$ 1,500
Valuation allowance against tax credit	1,100
Tax credit carryforwards with indefinite life	$ 1,100
Domestic Federal
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2019
Tax credits expiration year	2019
General business tax credit carryforwards	$ 12,500
Deferred tax assets operating loss carry forwards subject to expiration	72,400
Valuation allowance against the tax benefit associated with NOLs	$ 1,000
State and Local Jurisdiction
Income Taxes [Line Items]
Deferred tax assets operating loss carry forwards expiration year	2019
Tax credits expiration year	2022
General business tax credit carryforwards	$ 700
Deferred tax assets, valuation allowance	1,100
Deferred tax assets operating loss carry forwards subject to expiration	1,800
Valuation allowance against the tax benefit associated with NOLs	$ 1,000
India Tax Authority
Income Taxes [Line Items]
Income tax examination description	The Company's Indian income tax returns covering fiscal years 2003, 2005, and 2010 through 2013 are under audit by the Indian tax authority.

Income Taxes - Components of Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
United States									$ 16,312	$ (42,863)	$ 134,740
Foreign									75,487	86,435	50,841
Income before income taxes	$ 108,744	$ 17,245	$ (10,810)	$ (23,380)	$ 98,922	$ 1,155	$ (50,723)	$ (5,782)	$ 91,799	$ 43,572	$ 185,581

Income Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Federal
Current									$ 6,545	$ 2,586	$ 14,108
Deferred									(6,587)	19,212	19,034
Total									(42)	21,798	33,142
State
Current									4,441	(1,857)	12,565
Deferred									(2,649)	(1,324)	(2,502)
Total									1,792	(3,181)	10,063
Foreign
Current									17,626	16,048	11,671
Deferred									3,502	3,772	1,170
Total									21,128	19,820	12,841
Income tax provision	$ 21,054	$ 2,012	$ 3,764	$ (3,952)	$ 65,758	$ (2,233)	$ (20,914)	$ (4,174)	$ 22,878	$ 38,437	$ 56,046

Income Taxes - Summary of Differences Between Income Tax Expense Computed at Statutory Federal Income Tax Rate and Per Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax expense at federal rate of 21% (35% pre-2018)									$ 19,278	$ 15,250	$ 64,953
State income taxes, net of federal benefit									5,246	(2,238)	7,060
Change in valuation allowance									12,657	(1,884)	(8,524)
Foreign tax rate differential									(4,796)	(15,622)	(11,830)
Unrecognized tax benefit increase									1,262	3,007	1,045
Tax effect of foreign operations									8,546	5,532	5,988
Tax benefit of research & development									(2,557)	(1,904)	(1,088)
Transition tax									(8,112)	20,867
Revaluation of deferred tax balances									(4,937)	14,953
Performance-based compensation									(4,541)	2,081
Domestic production activities										(3,793)	(700)
Other									832	2,188	(858)
Income tax provision	$ 21,054	$ 2,012	$ 3,764	$ (3,952)	$ 65,758	$ (2,233)	$ (20,914)	$ (4,174)	$ 22,878	$ 38,437	$ 56,046

Income Taxes - Summary of Differences Between Income Tax Expense Computed at Statutory Federal Income Tax Rate and Per Consolidated Statements of Operations (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective tax rate	21.00%	35.00%	35.00%

Income Taxes - Deferred Tax Assets and Liabilities Result from Differences in Timing of Recognition of Certain Income and Expense Items for Tax and Financial Accounting Purposes (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred income tax assets:
Net operating loss carryforwards	$ 25,745	$ 38,419
Tax credits	43,838	37,305
Compensation	15,934	18,124
Deferred revenue	27,587	22,248
Research and development expense deferral	12,631
Other	5,393	9,055
Gross deferred income tax assets	131,128	125,151
Less: valuation allowance	(20,415)	(7,808)
Net deferred income tax assets	110,713	117,343
Deferred income tax liabilities:
Depreciation and amortization	(60,872)	(67,504)
Deferred revenue	(54,508)
Total deferred income tax liabilities	(115,380)	(67,504)
Net deferred income taxes		49,839
Net deferred income taxes	(4,667)
Deferred income taxes / liabilities included in the balance sheet are:
Deferred income tax asset - noncurrent	27,048	66,749
Deferred income tax liability - noncurrent	(31,715)	(16,910)
Net deferred income taxes		$ 49,839
Net deferred income taxes	$ (4,667)

Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Balance of unrecognized tax benefits at beginning of year	$ 27,237	$ 24,278	$ 21,079
Increases for tax positions of prior years	315	2,478	58
Decreases for tax positions of prior years	(61)	(114)	(361)
Increases for tax positions established for the current period	1,185	1,677	5,185
Decreases for settlements with taxing authorities		(154)	(167)
Reductions resulting from lapse of applicable statute of limitation	(115)	(1,155)	(1,310)
Adjustment resulting from foreign currency translation	(155)	227	(206)
Balance of unrecognized tax benefits at end of year	$ 28,406	$ 27,237	$ 24,278

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Sep. 23, 2015	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Commitments And Contingencies [Line Items]
Total operating lease expense			$ 24.6	$ 24.1	$ 25.3
Loss Contingency, name of plaintiff		Baldwin Hackett & Meeks, Inc.
Loss contingency, damages sought, value	$ 43.8
Loss contingency, damages awarded, value		$ 43.8
BHMI judgment and related fees				48.1
Litigation settlement				2.7
General and Administrative Expense [Member]
Commitments And Contingencies [Line Items]
BHMI judgment and related fees				$ 46.7
Interest Expense [Member]
Commitments And Contingencies [Line Items]
BHMI judgment and related fees			$ 1.4

Commitments and Contingencies - Aggregate Minimum Operating Lease Payments (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Operating Leases
2019	$ 16,925
2020	14,212
2021	10,538
2022	8,178
2023	6,529
Thereafter	21,196
Total minimum lease payments	$ 77,578

Accumulated Other Comprehensive Loss - Activity within Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 764,597	$ 754,917	$ 654,400
Other comprehensive income (loss)	(15,261)	16,744	(22,524)
Ending balance	1,048,231	764,597	754,917
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(77,356)	(94,100)	(71,576)
Other comprehensive income (loss)	(15,261)	16,744	(22,524)
Ending balance	$ (92,617)	$ (77,356)	$ (94,100)

Quarterly Financial Data (Unaudited) (Detail) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Revenues:

Total revenues

$ 319,950

$ 245,525

$ 234,995

$ 209,310

$ 326,395

$ 225,735

$ 240,599

$ 231,462

$ 1,009,780

$ 1,024,191

$ 1,005,701

Operating expenses:

Cost of revenue

^[1]

104,281

102,473

116,261

107,336

115,993

107,393

120,357

108,543

430,351

452,286

444,914

Research and development

32,969

36,008

37,862

36,791

30,732

33,935

34,969

37,285

143,630

136,921

169,900

Selling and marketing

24,576

28,252

33,160

31,893

26,695

25,236

28,817

27,137

117,881

107,885

118,082

General and administrative

20,399

29,537

28,837

28,649

22,700

^[2]

25,302

^[2]

72,527

^[2]

32,503

^[2]

107,422

153,032

^[2]

113,617

Depreciation and amortization

21,311

20,896

21,033

21,345

22,238

22,446

22,372

22,371

84,585

89,427

89,521

Total operating expenses

203,536

217,166

237,153

226,014

218,358

214,312

279,042

227,839

883,869

939,551

Operating income (loss)

116,414

28,359

(2,158)

(16,704)

108,037

11,423

(38,443)

3,623

125,911

84,640

221,130

Other income (expense):

Interest expense

(9,875)

(12,573)

(9,717)

(9,365)

(8,815)

(9,374)

(10,664)

(10,160)

(41,530)

(39,013)

(40,184)

Interest income

2,893

2,763

2,742

2,744

143

165

150

106

11,142

564

530

Other, net

(688)

(1,304)

(1,677)

(55)

(443)

(1,059)

(1,766)

649

(3,724)

(2,619)

4,105

Total other income (expense)

(7,670)

(11,114)

(8,652)

(6,676)

(9,115)

(10,268)

(12,280)

(9,405)

(34,112)

(41,068)

(35,549)

Income (loss) before income taxes

108,744

17,245

(10,810)

(23,380)

98,922

1,155

(50,723)

(5,782)

91,799

43,572

185,581

Income tax expense (benefit)

21,054

2,012

3,764

(3,952)

65,758

(2,233)

(20,914)

(4,174)

22,878

38,437

56,046

Net income (loss)

$ 87,690

$ 15,233

$ (14,574)

$ (19,428)

$ 33,164

$ 3,388

$ (29,809)

$ (1,608)

$ 68,921

$ 5,135

$ 129,535

Earnings (loss) per share

Basic

$ 0.76

$ 0.13

$ (0.13)

$ (0.17)

$ 0.28

$ 0.03

$ (0.25)

$ (0.01)

$ 0.59

$ 0.04

$ 1.10

Diluted

$ 0.74

$ 0.13

$ (0.13)

$ (0.17)

$ 0.28

$ 0.03

$ (0.25)

$ (0.01)

$ 0.59

$ 0.04

$ 1.09

Software as a service and platform as a service [Member]

Revenues:

Total revenues

$ 110,626

$ 104,519

$ 113,600

$ 104,280

$ 112,895

$ 99,761

$ 113,469

$ 99,447

$ 433,025

$ 425,572

$ 411,289

License [Member]

Revenues:

Total revenues

137,991

68,964

45,555

28,046

129,546

50,017

54,180

59,381

280,556

293,124

273,466

Maintenance [Member]

Revenues:

Total revenues

53,065

54,373

55,048

56,659

55,242

56,349

56,009

54,471

219,145

222,071

233,476

Services [Member]

Revenues:

Total revenues

$ 18,268

$ 17,669

$ 20,792

$ 20,325

$ 28,712

$ 19,608

$ 16,941

$ 18,163

$ 77,054

$ 83,424

$ 87,470

[1]	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.
[2]	General and administrative expenses in the second quarter includes the BHMI judgment.

Subsequent Event - Additional Information (Detail) - Subsequent Event [Member] $ in Millions	1 Months Ended
	Feb. 28, 2019 USD ($)
Bank of America [Member]
Subsequent Event [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500.0
SpeedPay [Member]
Subsequent Event [Line Items]
Acquisition purchase price	$ 750.0