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Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	May 06, 2019
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Entity Registrant Name	ACI WORLDWIDE, INC.
Entity Central Index Key	0000935036
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Trading Symbol	ACIW
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		110,563,189

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 176,173	$ 148,502
Receivables, net of allowances of $3,663 and $3,912, respectively	265,750	348,182
Prepaid expenses	31,464	23,277
Other current assets	40,830	46,516
Total current assets	514,217	566,477
Noncurrent assets
Accrued receivables, net	177,407	189,010
Property and equipment, net	70,909	72,729
Operating lease right-of-use assets	60,978
Software, net	130,812	137,228
Goodwill	909,691	909,691
Intangible assets, net	162,845	168,127
Deferred income taxes, net	38,408	27,048
Other noncurrent assets	48,875	52,145
TOTAL ASSETS	2,114,142	2,122,455
Current liabilities
Accounts payable	28,046	39,602
Employee compensation	29,570	38,115
Current portion of long-term debt	20,788	20,767
Deferred revenue	91,369	104,843
Other current liabilities	90,604	93,293
Total current liabilities	260,377	296,620
Noncurrent liabilities
Deferred revenue	60,853	51,292
Long-term debt	645,784	650,989
Deferred income taxes, net	24,705	31,715
Operating lease liabilities	50,636
Other noncurrent liabilities	39,203	43,608
Total liabilities	1,081,558	1,074,224
Commitments and contingencies
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued at March 31, 2019, and December 31, 2018
Common stock; $0.005 par value; 280,000,000 shares authorized; 140,525,055 shares issued at March 31, 2019, and December 31, 2018	702	702
Additional paid-in capital	636,960	632,235
Retained earnings	837,805	863,768
Treasury stock, at cost, 23,994,620 and 24,401,694 shares at March 31, 2019, and December 31, 2018, respectively	(351,587)	(355,857)
Accumulated other comprehensive loss	(91,296)	(92,617)
Total stockholders' equity	1,032,584	1,048,231
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 2,114,142	$ 2,122,455

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Receivables, allowances	$ 3,663	$ 3,912
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	23,994,620	24,401,694

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

3 Months Ended

Mar. 31, 2019

Mar. 31, 2018

Revenues

Total revenues

$ 205,855

$ 209,310

Operating expenses

Cost of revenue

^[1]

114,941

107,336

Research and development

36,194

36,791

Selling and marketing

29,430

31,893

General and administrative

31,517

28,649

Depreciation and amortization

21,866

21,345

Total operating expenses

233,948

226,014

Operating loss

(28,093)

(16,704)

Other income (expense)

Interest expense

(11,614)

(9,365)

Interest income

3,033

2,744

Other, net

(1,912)

(55)

Total other income (expense)

(10,493)

(6,676)

Loss before income taxes

(38,586)

(23,380)

Income tax benefit

(12,623)

(3,952)

Net loss

$ (25,963)

$ (19,428)

Loss per common share

Basic

$ (0.22)

$ (0.17)

Diluted

$ (0.22)

$ (0.17)

Weighted average common shares outstanding

Basic

116,090

115,642

Diluted

116,090

115,642

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

Revenues

Total revenues

$ 108,557

$ 104,280

License [Member]

Revenues

Total revenues

21,078

28,046

Maintenance [Member]

Revenues

Total revenues

55,111

56,659

Services [Member]

Revenues

Total revenues

$ 21,109

$ 20,325

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

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (25,963)	$ (19,428)
Other comprehensive income:
Foreign currency translation adjustments	1,321	5,659
Total other comprehensive income	1,321	5,659
Comprehensive loss	$ (24,642)	$ (13,769)

- Definition

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

+ References + Details

CONDENSED 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, 2017	$ 764,597	$ 702	$ 610,345	$ 550,866	$ (319,960)	$ (77,356)
Net loss	(19,428)			(19,428)
Other comprehensive income	5,659					5,659
Stock-based compensation	6,362		6,362
Shares issued and forfeited, net, under stock plans including income tax benefits	9,877		206		9,671
Repurchase of common stock	(31,113)				(31,113)
Repurchase of restricted share awards and restricted share units for tax withholdings	(914)				(914)
Cumulative effect of accounting change, ASC 606	243,981			243,981
Ending balance at Mar. 31, 2018	979,021	702	616,913	775,419	(342,316)	(71,697)
Beginning balance at Dec. 31, 2018	1,048,231	702	632,235	863,768	(355,857)	(92,617)
Net loss	(25,963)			(25,963)
Other comprehensive income	1,321					1,321
Stock-based compensation	6,585		6,585
Shares issued and forfeited, net, under stock plans including income tax benefits	5,665		(1,860)		7,525
Repurchase of common stock	(631)				(631)
Repurchase of restricted share awards and restricted share units for tax withholdings	(2,624)				(2,624)
Ending balance at Mar. 31, 2019	$ 1,032,584	$ 702	$ 636,960	$ 837,805	$ (351,587)	$ (91,296)

- Definition

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

+ References + Details

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - shares	3 Months Ended		79 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019
Repurchase of common stock, shares	23,802	1,346,427	44,153,195

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net loss	$ (25,963)	$ (19,428)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation	5,901	5,926
Amortization	18,951	19,067
Amortization of operating lease right-of-use assets	3,383
Amortization of deferred debt issuance costs	753	699
Deferred income taxes	(17,414)	(4,827)
Stock-based compensation expense	6,585	6,362
Other	574	(663)
Changes in operating assets and liabilities
Receivables	94,549	68,741
Accounts payable	(10,297)	(2,611)
Accrued employee compensation	(8,598)	(14,743)
Current income taxes	(1,041)	(3,569)
Deferred revenue	(4,127)	11,326
Other current and noncurrent assets and liabilities	(20,829)	(21,144)
Net cash flows from operating activities	42,427	45,136
Cash flows from investing activities:
Purchases of property and equipment	(5,250)	(5,937)
Purchases of software and distribution rights	(4,578)	(6,652)
Net cash flows from investing activities	(9,828)	(12,589)
Cash flows from financing activities:
Proceeds from issuance of common stock	831	753
Proceeds from exercises of stock options	4,857	9,118
Repurchase of restricted share awards and restricted share units for tax withholdings	(2,624)	(914)
Repurchases of common stock	(631)	(31,113)
Proceeds from revolving credit facility		48,000
Repayment of revolving credit facility		(50,000)
Repayment of term portion of credit agreement	(5,937)	(5,187)
Payments on other debt	(1,857)	(352)
Net cash flows from financing activities	(5,361)	(29,695)
Effect of exchange rate fluctuations on cash	433	1,719
Net increase in cash and cash equivalents	27,671	4,571
Cash and cash equivalents, beginning of period	148,502	69,710
Cash and cash equivalents, end of period	176,173	74,281
Supplemental cash flow information
Income taxes paid	5,949	8,263
Interest paid	$ 14,388	$ 13,127

Condensed Consolidated Financial Statements

3 Months Ended

Mar. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Condensed Consolidated Financial Statements

1. Condensed Consolidated Financial Statements

The unaudited condensed consolidated financial statements include the accounts of ACI Worldwide, Inc. and its wholly-owned subsidiaries (collectively, the “Company”). All intercompany balances and transactions have been eliminated. The condensed consolidated financial statements as of March 31, 2019, and for the three months ended March 31, 2019 and 2018, are unaudited and reflect all adjustments of a normal recurring nature, which are, in the opinion of management, necessary for a fair presentation, in all material respects, of the financial position and operating results for the interim periods. The condensed consolidated balance sheet as of December 31, 2018, is derived from the audited financial statements.

The condensed consolidated financial statements contained herein should be read in conjunction with the consolidated financial statements and notes thereto contained in the Company’s annual report on Form 10-K for the fiscal year ended December 31, 2018, filed on March 1, 2019. Results for the three months ended March 31, 2019, are not necessarily indicative of results that may be attained in the future.

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

Other Current Assets and Other Current Liabilitie

(in thousands)	March 31, 2019		December 31, 2018
Settlement receivables	$	13,842	$	8,605
Settlement deposits		10,549		23,651
Other		16,439		14,260
Total other current assets	$	40,830	$	46,516

(in thousands)	March 31, 2019		December 31, 2018
Settlement payables	$	23,552	$	31,605
Operating lease liabilities		14,334		—
Royalties payable		14,751		11,318
Vendor financed licenses		4,152		3,551
Accrued interest		4,848		8,407
Other		28,967		38,412
Total other current liabilities	$	90,604	$	93,293

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. Upon confirmation 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 March 31, 2019, and December 31, 2018, was $199.6 million and $256.5 million, respectively.

Fair Value

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”) as of March 31, 2019, and December 31, 2018, was $409.5 million and $395.0 million respectively.

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

In accordance with the Accounting Standards Codification (“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 and has identified its operating segments, ACI On Demand and ACI On Premise, as its reporting units. As of March 31, 2019, the Company’s goodwill of

$909.7 million was allocated to its two reporting units, with $725.9 million allocated to ACI On Premise and $183.8 million allocated to ACI On Demand.

Recoverability of goodwill is measured using a discounted cash flow model incorporating discount rates commensurate with the risks involved. Use of a discounted cash flow model is common practice in impairment testing in the absence of available transactional market evidence to determine the fair value. The calculated fair value was substantially in excess of the current carrying value for all reporting units based upon the October 1, 2018, annual impairment test and there have been no indications of impairment in the subsequent periods.

New Accounting Standards Recently Adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 unless, as a policy election, a lessee elects not to apply ASC 842 to short-term leases. In addition, this standard requires both lessees and lessors to disclose certain key information about lease transactions. The Company adopted ASC 842 on January 1, 2019 (the effective date), using the optional transition method to not apply the new lease standard in the comparative periods presented and elected 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 including the combination of lease and non-lease components into a single lease component which the Company has elected to apply to its facilities leases. As of January 1, 2019, the Company recognized ROU assets and operating lease liabilities of

$63.3 million and $68.6 million, respectively. Refer to Note 13,

Leases

, for further details.

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. The Company adopted ASU 2018-02 as of January 1, 2019. The adoption of ASU 2018-02 did not have an impact on the condensed consolidated balance sheet, results of operations, and statement of cash flows.

Recently Issued Accounting Standards Not Yet Effective

In June 2016, the FASB issued ASU 2016-13,

Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments.

This ASU provides financial statement users with more decision-useful information about the expected credit losses on financial instruments and other commitments to extend credit held by a reporting entity at each reporting date. The amendments in ASU 2016-13 replace the incurred loss impairment methodology in current U.S. GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform credit loss estimates. The Company will be required to use a forward-looking expected credit loss model for accounts receivables and other financial instruments. Subsequent to issuing ASU 2016-13, the FASB issued ASU 2018-19,

Codification Improvements to Topic 326, Financial Instruments - Credit Losses

, for the purpose of clarifying certain aspects of ASU 2016-13. ASU 2018-19 has the same effective date and transition requirements as ASU 2016-13. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019. The Company is currently assessing the impact the adoption of ASU 2016-13 will have on its condensed consolidated balance sheet, results of operations, and cash flow.

Revenue

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue

2. Revenue

In accordance with ASC 606,

Revenue From Contracts With Customers

, 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. Refer to Note 11,

Segment Information,

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

location.

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.

	March 31,			December 31,
(in thousands)	2019			2018
Billed receivables	$	158,807		$	239,275
Allowance for doubtful accounts		(3,663	)		(3,912	)
Billed receivables, net	$	155,144		$	235,363
Accrued receivables		320,575			336,858
Significant financing component		(32,562	)		(35,029	)
Total accrued receivables, net		288,013			301,829
Less: current accrued receivables		120,569			123,053
Less: current significant financing component		(9,963	)		(10,234	)
Total long-term accrued receivables, net	$	177,407		$	189,010
Total receivables, net	$	443,157		$	537,192

No customer accounted for more than 10% of the Company’s consolidated receivables balance as of March 31, 2019, or December 31, 2018.

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):

Balance, December 31, 2018	$	156,135
Deferral of revenue		42,533
Recognition of deferred revenue		(46,701	)
Foreign currency translation		255
Balance, March 31, 2019	$	152,222

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 $628.3 million as of March 31, 2019, of which the Company expects to recognize approximately 46% over the next 12 months and the remainder thereafter.

During the three months ended March 31, 2019,

revenue recognized by the Company from performance obligations satisfied in previous periods was $3.9 million. During the three months ended March 31,

2018, revenue recognized by the Company from performance obligations satisfied in previous periods was

not significant

Acquisition

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Acquisition

3. Acquisition

Speedpay

On May 9, 2019, the Company acquired Speedpay, the U.S. bill pay business of Western Union Company (“WU”) for $750.0 million in cash, subject to adjustments, pursuant to a Stock Purchase Agreement, among the Company, WU, and ACI Worldwide Corp., a wholly owned subsidiary of the Company. The combination of the Company and Speedpay bill pay solutions will serve more than 4,000 customers across the U.S., bringing expanded reach in existing and complementary market segments such as consumer finance, insurance, healthcare, higher education, utilities, government, and mortgage. The acquisition of Speedpay will increase the scale of the Company’s On Demand platform business and allow the acceleration of platform innovation.

The acquisition of Speedpay will be accounted for using the acquisition method of accounting, where the Company will record all assets acquired and liabilities assumed at their respective acquisition-date fair values. The Company has not completed the valuation analysis and calculations necessary to finalize the required purchase price allocations. In addition to goodwill, the final purchase price allocation may include allocations to intangible assets such as trademarks and tradenames, developed technology, and customer-related assets.

Effective April 5, 2019, the Company entered into an amendment agreement (the “amendment”) with ACI Worldwide Corp., Official Payments Corporation, the lenders, and Bank of America, N.A., as administrative agent for the lenders, to amend and restate the Company’s Credit Agreement, dated February 24, 2017. The amendment permitted the Company to borrow up to $500.0 million in the form of a senior secured term loan; extended the revolver and the term loan maturity date from February 24, 2022, to April 5, 2024; and increased the maximum consolidated senior secured net leverage ratio covenant from 3.50:1.00 to 3.75:1.00; among other things. The Company used the funds from the new term loan, in addition to drawing $250.0 million on the available Revolving Credit Facility, to fund the acquisition.

Through March 31, 2019, the Company expensed approximately $4.7 million of costs related to the acquisition of Speedpay. These costs, which consist primarily of consulting and legal fees, are included in general and administrative expenses in the condensed consolidated statements of operations.

Debt

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

4. Debt

As of March 31, 2019, the Company had $279.0 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 the 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.

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 London Interbank Offered Rate (“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 as of March 31, 2019, for the Credit Facility was 4.25%.

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

The Company used the net proceeds of the offering described above to redeem in full the Company’s outstanding 6.375% Senior Notes due 2020, including accrued interest, and repaid a portion of the outstanding amount under the Term Credit Facility.

Maturities on long-term debt outstanding as of March 31, 2019, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	17,810
2020		23,747
2021		31,662
2022		205,804
2023		—
Thereafter		400,000
Total	$	679,023

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 March 31, 2019, 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):

	March 31, 2019			December 31, 2018
Term credit facility	$	279,023		$	284,959
5.750% Senior notes, due August 2026		400,000			400,000
Debt issuance costs		(12,451	)		(13,203	)
Total debt		666,572			671,756
Less: current portion of term credit facility		23,747			23,747
Less: current portion of debt issuance costs		(2,959	)		(2,980	)
Total long-term debt	$	645,784		$	650,989

Other

As of March 31, 2019, $9.4 million is outstanding related to certain multi-year license agreements for internal use software, of which $2.5 million and $6.9 million is included in other current liabilities and other noncurrent liabilities, respectively, in the condensed consolidated balance sheet.

Stock-Based Compensation Plans

3 Months Ended

Mar. 31, 2019

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

Stock-Based Compensation Plans

5. Stock-Based Compensation Plans

Employee Stock Purchase Plan

Shares issued under the 2017 Employee Stock Purchase Plan during the three months ended March 31, 2019 and 2018, totaled 32,174 and 38,145, respectively.

Stock Options

A summary of stock option activity 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 as of December 31, 2018		4,864,836		$	17.76
Exercised		(313,282	)		15.50
Forfeited		(3,496	)		17.89
Outstanding as of March 31, 2019		4,548,058		$	17.91		6.02	$	68,018,687
Exercisable as of March 31, 2019		3,946,163		$	17.58		5.80	$	60,350,648

The weighted-average grant date fair value of stock options granted during the three months ended March 31, 2018, was $7.03. The total intrinsic value of stock options exercised during the three months ended March 31, 2019 and 2018, was $5.3 million and $7.2 million,

respectively. There were no stock options granted during the three months ended March 31, 2019.

The fair value of options granted during the three months ended March 31, 2018, were estimated on the date of grant using the Black-Scholes option-pricing model, acceptable under ASC 718,

Compensation – Stock Compensation

(“ASC 718”), with the following weighted-average assumptions:

	Three Months Ended
	March 31, 2018
Expected life (years)		5.6
Risk-free interest rate		2.7	%
Expected volatility		26.4	%
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 the 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.

Long-term Incentive Program Performance Share Awards

A summary of nonvested long-term incentive program performance share awards (“LTIP performance shares”) is as follows:

Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		540,697		$	19.83
Forfeited		(1,036	)		20.12
Nonvested as of March 31, 2019		539,661		$	19.83

Restricted Share Awards

A summary of nonvested restricted share awards (“RSAs”) is as follows:

Nonvested Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		213,337		$	20.21
Vested		(98,769	)		20.12
Forfeited		(3,975	)		20.12
Nonvested as of March 31, 2019		110,593		$	20.29

During the three months ended March 31, 2019, a total of 98,769 RSAs vested. The Company withheld 30,878 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

Total Shareholder Return Awards

A summary of nonvested total shareholder return awards (“TSRs”) is as follows:

Nonvested Total Shareholder Return Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		718,931		$	29.25
Granted		436,674			47.90
Forfeited		(5,457	)		31.31
Nonvested as of March 31, 2019		1,150,148		$	36.32

The fair value of TSRs granted during the three months ended March 31, 2019 and 2018, were estimated on the date of grant using the Monte Carlo simulation model, acceptable under ASC 718, using the following weighted-average assumptions:

	Three Months Ended March 31,
	2019			2018
Expected life (years)		2.8			2.9
Risk-free interest rate		2.5	%		2.4	%
Expected volatility		29.3	%		28.0	%
Expected dividend yield		—			—

Restricted Share Units

A summary of nonvested restricted share unit awards (“RSUs”) is as follows:

Nonvested Restricted Share Units	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		651,045		$	23.82
Granted		550,091			33.07
Vested		(173,547	)		23.36
Forfeited		(8,346	)		23.36
Nonvested as of March 31, 2019		1,019,243		$	28.90

During the three months ended March 31, 2019, a total of 173,547 RSUs vested. The Company withheld 53,274 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

As of March 31, 2019, there were unrecognized compensation costs of $31.6 million related to nonvested TSRs, $26.7 million related to nonvested RSUs, $3.0 million related to nonvested LTIP performance shares, $1.1 million related to nonvested stock options, and $1.9 million related to nonvested RSAs, which the Company expects to recognize over weighted-average periods of 2.3 years, 1.9 years, 1.0 years, 0.9 years, and 0.9 years, respectively.

The Company recorded stock-based compensation expense recognized under ASC 718 for the three months ended March 31, 2019 and 2018, of $6.6 million and $6.4 million, respectively, with corresponding tax benefits of $1.2 million and $1.0 million, respectively.

Software and Other Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Software and Other Intangible Assets

6. Software and Other Intangible Assets

As of March 31, 2019, software net book value totaled $130.8 million, net of $261.1 million of accumulated amortization. Included in this net book value amount is software for resale of $24.8 million and software acquired or developed for internal use of $106.0 million.

As of 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.

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 recorded during the three months ended March 31, 2019 and 2018, totaled $3.0 million and $3.6 million, respectively. These software amortization expense amounts are reflected in cost of revenue in the condensed 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 three months ended March 31, 2019 and 2018, totaled $10.4 million and $10.5 million, respectively. These software amortization expense amounts are reflected in depreciation and amortization in the condensed 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):

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	298,459	$	(136,628	)	$	161,831	$	297,991	$	(131,187	)	$	166,804
Trademarks and tradenames		16,346		(15,332	)		1,014		16,348		(15,025	)		1,323
	$	314,805	$	(151,960	)	$	162,845	$	314,339	$	(146,212	)	$	168,127

Other intangible assets amortization expense during the three months ended March 31, 2019 and 2018, totaled $5.5 million and $4.9 million, respectively

Based on capitalized intangible assets as of March

2019

, estimated amortization expense amounts in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
Remainder of 2019	$	37,383	$	16,340
2020		40,353		20,992
2021		27,637		20,506
2022		13,167		20,359
2023		6,633		20,053
Thereafter		5,639		64,595
Total	$	130,812	$	162,845

Corporate Restructuring and Other Organizational Changes

3 Months Ended

Mar. 31, 2019

Restructuring and Related Activities [Abstract]

Corporate Restructuring and Other Organizational Changes

7. Corporate Restructuring and Other Organizational Changes

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

Balance, December 31, 2018	$	4,127
Amounts paid during the period		(389	)
Foreign currency translation adjustments		42
Balance, March 31, 2019	$	3,780

Of the $3.8 million restructuring liability, $1.6 million and $2.2 million are recorded in other current liabilities and operating lease liabilities, respectively, in the condensed consolidated balance sheet as of March 31, 2019.

Common Stock and Treasury Stock

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Common Stock and Treasury Stock

8. Common Stock and Treasury Stock

In 2005, the 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 23,802 shares for $0.6 million under the program during the three months ended March 31, 2019. Under the program to date, the Company has repurchased 44,153,195 shares for approximately $548.5 million. As of March 31, 2019, the maximum remaining amount authorized for purchase under the stock repurchase program was $176.0 million.

Loss Per Share

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Loss Per Share

9. Loss Per Share

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

Earnings per Share

, based on weighted average outstanding common shares. Diluted loss 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 loss per share (in thousands):

	Three Months Ended March 31,
	2019		2018
Weighted average shares outstanding:
Basic weighted average shares outstanding		116,090		115,642
Add: Dilutive effect of stock options and RSUs		—		—
Diluted weighted average shares outstanding		116,090		115,642

The diluted loss per share computation excludes

7.4 million and 8.6 million options to purchase shares, RSUs, and contingently issuable shares during the three months ended March 31, 2019 and 2018, respectively, as their effect would be anti-dilutive.

Common stock outstanding as of March 31, 2019, and December 31, 2018, was 116,530,435 and 116,123,361, respectively.

Other, Net

3 Months Ended

Mar. 31, 2019

Other Income and Expenses [Abstract]

Other, Net

10. Other, Net

Other, net is comprised of foreign currency transaction losses of $1.9 million and $0.1 million for the three months ended March 31, 2019 and 2018, respectively.

Segment Information

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Segment Information

11. 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 (“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, 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 for SaaS offerings, or in a multi-tenant environment for 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).

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.

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

	Three Months Ended March 31,
	2019			2018
Revenue
ACI On Premise	$	96,007		$	105,030
ACI On Demand		109,848			104,280
Total revenue	$	205,855		$	209,310
Segment Adjusted EBITDA
ACI On Premise	$	28,268		$	38,898
ACI On Demand		(262	)		(4,233	)
Depreciation and amortization		(24,852	)		(24,993	)
Stock-based compensation expense		(6,585	)		(6,362	)
Corporate and unallocated expenses		(24,662	)		(20,014	)
Interest, net		(8,581	)		(6,621	)
Other, net		(1,912	)		(55	)
Loss before income taxes	$	(38,586	)	$	(23,380	)
Depreciation and amortization
ACI On Premise	$	3,030		$	2,975
ACI On Demand		7,562			7,736
Corporate		14,260			14,282
Total depreciation and amortization	$	24,852		$	24,993
Stock-based compensation expense
ACI On Premise	$	1,956		$	1,467
ACI On Demand		1,951			1,463
Corporate		2,678			3,432
Total stock-based compensation expense	$	6,585		$	6,362

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 (in thousands):

	Three Months Ended March 31, 2019						Three Months Ended March 31, 2018
	ACI On Premise		ACI On Demand		Total		ACI On Premise		ACI On Demand		Total
Primary Geographic Markets
Americas - United States	$	26,422	$	93,036	$	119,458	$	30,864	$	88,946	$	119,810
Americas - Other		10,945		2,743		13,688		16,784		2,319		19,103
EMEA		42,451		12,068		54,519		38,686		12,009		50,695
Asia Pacific		16,189		2,001		18,190		18,696		1,006		19,702
Total	$	96,007	$	109,848	$	205,855	$	105,030	$	104,280	$	209,310
Primary Solution Categories
Bill Payments	$	—	$	68,967	$	68,967	$	—	$	66,168	$	66,168
Digital Channels		8,725		9,788		18,513		11,363		10,644		22,007
Merchant Payments		5,022		19,339		24,361		5,010		12,371		17,381
Payments Intelligence		7,037		8,981		16,018		10,420		11,798		22,218
Real-Time Payments		14,715		618		15,333		13,641		450		14,091
Retail Payments		60,508		2,155		62,663		64,596		2,849		67,445
Total	$	96,007	$	109,848	$	205,855	$	105,030	$	104,280	$	209,310

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

	March 31, 2019		December 31, 2018
Long-lived assets
United States	$	829,953	$	811,435
Other		731,564		717,495
	$	1,561,517	$	1,528,930

No single customer accounted for more than 10% of the Company’s consolidated revenues during the three months ended March 31, 2019 and 2018. No other country outside the United States accounted for more than 10% of the Company’s consolidated revenues during the three months ended March 31, 2019 and 2018.

Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

12. Income Taxes

The effective tax rate for the three months ended March 31, 2019, was 33%. The Company reported an overall tax benefit on a pretax loss for the three months ended March 31, 2019. The losses of the Company’s foreign entities for the three months ended March 31, 2019, were $6.1 million. The effective tax rate for the three months ended March 31, 2019, was positively impacted by equity compensation excess tax benefits and state income tax benefits on domestic loss.

The effective tax rate for the three months ended March 31, 2018, was 17%. The losses of the Company’s foreign entities for the three months ended March 31, 2018, were $1.8 million. The effective tax rate for the three months ended March 31, 2018, was negatively impacted by losses in certain foreign jurisdictions taxed at lower rates and domestic taxes resulting from the current GILTI tax, partially offset by equity compensation tax benefits.

The Company’s effective tax rate could fluctuate on a quarterly basis due to the occurrence of significant and unusual or infrequent items, such as vesting of stock-based compensation or foreign currency gains and losses. The Company’s effective tax rate could also fluctuate due to changes in the valuation of its deferred tax assets or liabilities, or by changes in tax laws, regulations, accounting principles, or interpretations thereof. In addition, the Company is occasionally subject to examination of its income tax returns by tax authorities in the jurisdictions it operates. The Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of its provision for income

taxes.

As of March 31, 2019, and December 31, 2018, the amount of unrecognized tax benefits for uncertain tax positions was $28.3 million and $28.4 million, respectively, excluding related liabilities for interest and penalties of $1.2 million as of March 31, 2019 and December 31, 2018.

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 limitation.

Leases

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Leases

13. Leases

The Company has operating leases for corporate offices and datacenters. Excluding office leases, leases with an initial term of 12 months or less (that do not include an option to purchase the underlying asset) are not recorded on the condensed consolidated balance sheet, and are expensed on a straight-line basis over the lease term.

The Company’s leases typically include certain renewal options to extend the leases for up to 25 years, some of which include options to terminate the leases within one year. The exercise of lease renewal options is at the Company’s sole discretion. The Company combines lease and non-lease components of its leases and currently has no leases with options to purchase the leased property. The Company accounts for payments of maintenance and property tax costs paid by it as variable lease cost, which are expensed as incurred.

The components of lease cost are as follows (in thousands):

	Three Months Ended
	March 31, 2019
Operating lease cost	$	4,036
Variable lease cost		986
Sublease income		(139	)
Total lease cost	$	4,883

Supplemental cash flow information related to leases is as follows (in thousands):

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	5,411
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases		1,218

Supplemental balance sheet information related to leases is as follows (in thousands, except lease term and discount rate):

	March 31, 2019
Assets:
Operating lease right-of-use assets	$	60,978
Liabilities:
Other current liabilities	$	14,334
Operating lease liabilities		50,636
Total operating lease liabilities	$	64,970
Weighted average remaining operating lease term		7.02
Weighted average operating lease discount rate		3.96	%

The Company uses its incremental borrowing rate as the discount rate. As the Company enters into operating leases in multiple jurisdictions and denominated in currencies other than the U.S. dollar, judgment is used to determine the Company’s incremental borrowing rate including (1) conversion of its subordinated borrowing rate (using published yield curves) to an unsubordinated and collateralized rate (2) adjusting the rate to align with the term of each lease and (3) adjusting the rate to incorporate the effects of the currency in which the lease is denominated.

Maturities on lease liabilities as of March 31, 2019, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	12,471
2020		14,895
2021		10,915
2022		8,387
2023		6,698
Thereafter		21,122
Total lease payments		74,488
Less: imputed interest		9,518
Total lease liability	$	64,970

Future payments under operating lease agreements accounted for under ASC 840,

Leases,

as of December 31, 2018, were as follows (in thousands):

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

As of March 31, 2019, the Company has additional operating leases for office facilities that have not yet commenced with minimum lease payments of

$3.7 million. These operating leases will commence between fiscal year 2019 and 2020 with lease terms of one to seven years.

Condensed Consolidated Financial Statements (Policies)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Other Current Assets and Other Current Liabilities

Other Current Assets and Other Current Liabilitie

(in thousands)	March 31, 2019		December 31, 2018
Settlement receivables	$	13,842	$	8,605
Settlement deposits		10,549		23,651
Other		16,439		14,260
Total other current assets	$	40,830	$	46,516

(in thousands)	March 31, 2019		December 31, 2018
Settlement payables	$	23,552	$	31,605
Operating lease liabilities		14,334		—
Royalties payable		14,751		11,318
Vendor financed licenses		4,152		3,551
Accrued interest		4,848		8,407
Other		28,967		38,412
Total other current liabilities	$	90,604	$	93,293

Off Balance Sheet Settlement Accounts

Fair Value

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

Goodwill

In accordance with the Accounting Standards Codification (“ASC”) 350,

Intangibles – Goodwill and Other,

$909.7 million was allocated to its two reporting units, with $725.9 million allocated to ACI On Premise and $183.8 million allocated to ACI On Demand.

New Accounting Standards Recently Adopted

In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02,

Leases

$63.3 million and $68.6 million, respectively. Refer to Note 13,

Leases

, for further details.

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

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

Recently Issued Accounting Standards Not Yet Effective

In June 2016, the FASB issued ASU 2016-13,

Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments.

Codification Improvements to Topic 326, Financial Instruments - Credit Losses

Condensed Consolidated Financial Statements (Tables)

3 Months Ended

Mar. 31, 2019

Accounting Policies [Abstract]

Components of Other Current Assets and Other Current Liabilities

Other Current Assets and Other Current Liabilitie

(in thousands)	March 31, 2019		December 31, 2018
Settlement receivables	$	13,842	$	8,605
Settlement deposits		10,549		23,651
Other		16,439		14,260
Total other current assets	$	40,830	$	46,516

(in thousands)	March 31, 2019		December 31, 2018
Settlement payables	$	23,552	$	31,605
Operating lease liabilities		14,334		—
Royalties payable		14,751		11,318
Vendor financed licenses		4,152		3,551
Accrued interest		4,848		8,407
Other		28,967		38,412
Total other current liabilities	$	90,604	$	93,293

Revenue (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Total Receivables

	March 31,			December 31,
(in thousands)	2019			2018
Billed receivables	$	158,807		$	239,275
Allowance for doubtful accounts		(3,663	)		(3,912	)
Billed receivables, net	$	155,144		$	235,363
Accrued receivables		320,575			336,858
Significant financing component		(32,562	)		(35,029	)
Total accrued receivables, net		288,013			301,829
Less: current accrued receivables		120,569			123,053
Less: current significant financing component		(9,963	)		(10,234	)
Total long-term accrued receivables, net	$	177,407		$	189,010
Total receivables, net	$	443,157		$	537,192

Changes in Deferred Revenue

Balance, December 31, 2018	$	156,135
Deferral of revenue		42,533
Recognition of deferred revenue		(46,701	)
Foreign currency translation		255
Balance, March 31, 2019	$	152,222

Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Maturities on Long-Term Debt Outstanding

Maturities on long-term debt outstanding as of March 31, 2019, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	17,810
2020		23,747
2021		31,662
2022		205,804
2023		—
Thereafter		400,000
Total	$	679,023

Schedule of Total Debt

	March 31, 2019			December 31, 2018
Term credit facility	$	279,023		$	284,959
5.750% Senior notes, due August 2026		400,000			400,000
Debt issuance costs		(12,451	)		(13,203	)
Total debt		666,572			671,756
Less: current portion of term credit facility		23,747			23,747
Less: current portion of debt issuance costs		(2,959	)		(2,980	)
Total long-term debt	$	645,784		$	650,989

- 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

Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2019

Summary of Stock Option Activity

A summary of stock option activity 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 as of December 31, 2018		4,864,836		$	17.76
Exercised		(313,282	)		15.50
Forfeited		(3,496	)		17.89
Outstanding as of March 31, 2019		4,548,058		$	17.91		6.02	$	68,018,687
Exercisable as of March 31, 2019		3,946,163		$	17.58		5.80	$	60,350,648

Summary of Nonvested Restricted Share Awards

A summary of nonvested restricted share awards (“RSAs”) is as follows:

Nonvested Restricted Share Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		213,337		$	20.21
Vested		(98,769	)		20.12
Forfeited		(3,975	)		20.12
Nonvested as of March 31, 2019		110,593		$	20.29

Black-Scholes Option-Pricing Model [Member]

Summary of Grant Date Fair Value Weighted-Average Assumptions

The fair value of options granted during the three months ended March 31, 2018, were estimated on the date of grant using the Black-Scholes option-pricing model, acceptable under ASC 718,

Compensation – Stock Compensation

(“ASC 718”), with the following weighted-average assumptions:

	Three Months Ended
	March 31, 2018
Expected life (years)		5.6
Risk-free interest rate		2.7	%
Expected volatility		26.4	%
Expected dividend yield		—

LTIP Performance Shares [Member]

Summary of Nonvested Performance Award Activity

A summary of nonvested long-term incentive program performance share awards (“LTIP performance shares”) is as follows:

Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		540,697		$	19.83
Forfeited		(1,036	)		20.12
Nonvested as of March 31, 2019		539,661		$	19.83

Total Shareholder Return Awards (TSRs) [Member]

Summary of Nonvested Performance Award Activity

A summary of nonvested total shareholder return awards (“TSRs”) is as follows:

Nonvested Total Shareholder Return Awards	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		718,931		$	29.25
Granted		436,674			47.90
Forfeited		(5,457	)		31.31
Nonvested as of March 31, 2019		1,150,148		$	36.32

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

Summary of Grant Date Fair Value Weighted-Average Assumptions

	Three Months Ended March 31,
	2019			2018
Expected life (years)		2.8			2.9
Risk-free interest rate		2.5	%		2.4	%
Expected volatility		29.3	%		28.0	%
Expected dividend yield		—			—

Restricted Share Units (RSUs) [Member]

Summary of Nonvested Restricted Share Unit Activity

A summary of nonvested restricted share unit awards (“RSUs”) is as follows:

Nonvested Restricted Share Units	Number of Shares			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2018		651,045		$	23.82
Granted		550,091			33.07
Vested		(173,547	)		23.36
Forfeited		(8,346	)		23.36
Nonvested as of March 31, 2019		1,019,243		$	28.90

Software and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

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):

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	298,459	$	(136,628	)	$	161,831	$	297,991	$	(131,187	)	$	166,804
Trademarks and tradenames		16,346		(15,332	)		1,014		16,348		(15,025	)		1,323
	$	314,805	$	(151,960	)	$	162,845	$	314,339	$	(146,212	)	$	168,127

Estimated Intangible Asset Amortization Expense in Future Fiscal Years

Based on capitalized intangible assets as of March

2019

, estimated amortization expense amounts in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
Remainder of 2019	$	37,383	$	16,340
2020		40,353		20,992
2021		27,637		20,506
2022		13,167		20,359
2023		6,633		20,053
Thereafter		5,639		64,595
Total	$	130,812	$	162,845

Corporate Restructuring and Other Organizational Changes (Tables)

3 Months Ended

Mar. 31, 2019

Restructuring and Related Activities [Abstract]

Components of Corporate Restructuring and Other Reorganization Activities from Prior Acquisitions

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

Balance, December 31, 2018	$	4,127
Amounts paid during the period		(389	)
Foreign currency translation adjustments		42
Balance, March 31, 2019	$	3,780

Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

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

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

	Three Months Ended March 31,
	2019		2018
Weighted average shares outstanding:
Basic weighted average shares outstanding		116,090		115,642
Add: Dilutive effect of stock options and RSUs		—		—
Diluted weighted average shares outstanding		116,090		115,642

Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of Selected Financial Data by Reportable Segment

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

	Three Months Ended March 31,
	2019			2018
Revenue
ACI On Premise	$	96,007		$	105,030
ACI On Demand		109,848			104,280
Total revenue	$	205,855		$	209,310
Segment Adjusted EBITDA
ACI On Premise	$	28,268		$	38,898
ACI On Demand		(262	)		(4,233	)
Depreciation and amortization		(24,852	)		(24,993	)
Stock-based compensation expense		(6,585	)		(6,362	)
Corporate and unallocated expenses		(24,662	)		(20,014	)
Interest, net		(8,581	)		(6,621	)
Other, net		(1,912	)		(55	)
Loss before income taxes	$	(38,586	)	$	(23,380	)
Depreciation and amortization
ACI On Premise	$	3,030		$	2,975
ACI On Demand		7,562			7,736
Corporate		14,260			14,282
Total depreciation and amortization	$	24,852		$	24,993
Stock-based compensation expense
ACI On Premise	$	1,956		$	1,467
ACI On Demand		1,951			1,463
Corporate		2,678			3,432
Total stock-based compensation expense	$	6,585		$	6,362

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 (in thousands):

	Three Months Ended March 31, 2019						Three Months Ended March 31, 2018
	ACI On Premise		ACI On Demand		Total		ACI On Premise		ACI On Demand		Total
Primary Geographic Markets
Americas - United States	$	26,422	$	93,036	$	119,458	$	30,864	$	88,946	$	119,810
Americas - Other		10,945		2,743		13,688		16,784		2,319		19,103
EMEA		42,451		12,068		54,519		38,686		12,009		50,695
Asia Pacific		16,189		2,001		18,190		18,696		1,006		19,702
Total	$	96,007	$	109,848	$	205,855	$	105,030	$	104,280	$	209,310
Primary Solution Categories
Bill Payments	$	—	$	68,967	$	68,967	$	—	$	66,168	$	66,168
Digital Channels		8,725		9,788		18,513		11,363		10,644		22,007
Merchant Payments		5,022		19,339		24,361		5,010		12,371		17,381
Payments Intelligence		7,037		8,981		16,018		10,420		11,798		22,218
Real-Time Payments		14,715		618		15,333		13,641		450		14,091
Retail Payments		60,508		2,155		62,663		64,596		2,849		67,445
Total	$	96,007	$	109,848	$	205,855	$	105,030	$	104,280	$	209,310

Schedule of Long-lived Assets by Geographic Location

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

	March 31, 2019		December 31, 2018
Long-lived assets
United States	$	829,953	$	811,435
Other		731,564		717,495
	$	1,561,517	$	1,528,930

Leases (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Components of Lease Cost

The components of lease cost are as follows (in thousands):

	Three Months Ended
	March 31, 2019
Operating lease cost	$	4,036
Variable lease cost		986
Sublease income		(139	)
Total lease cost	$	4,883

Supplemental Cash Flow Information

Supplemental cash flow information related to leases is as follows (in thousands):

	Three Months Ended
	March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	5,411
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases		1,218

Supplemental Balance Sheet Information

Supplemental balance sheet information related to leases is as follows (in thousands, except lease term and discount rate):

	March 31, 2019
Assets:
Operating lease right-of-use assets	$	60,978
Liabilities:
Other current liabilities	$	14,334
Operating lease liabilities		50,636
Total operating lease liabilities	$	64,970
Weighted average remaining operating lease term		7.02
Weighted average operating lease discount rate		3.96	%

Maturities on Lease Liabilities

Maturities on lease liabilities as of March 31, 2019, are as follows (in thousands):

Fiscal year ending December 31,
2019	$	12,471
2020		14,895
2021		10,915
2022		8,387
2023		6,698
Thereafter		21,122
Total lease payments		74,488
Less: imputed interest		9,518
Total lease liability	$	64,970

Future payments under operating lease agreements

Future payments under operating lease agreements accounted for under ASC 840,

Leases,

as of December 31, 2018, were as follows (in thousands):

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

Condensed Consolidated Financial Statements - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items]
Amount of off balance sheet settlement funds	$ 199,600		$ 256,500
Goodwill	909,691		909,691
Operating Lease Liability	64,970
Right-of-use Asset (ROU)	60,978
ACI On Premise [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	725,900
ACI On Demand [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	183,800
Accounting Standards Update 2016-02 [Member]
Summary Of Significant Accounting Policies [Line Items]
Operating Lease Liability		$ 63,300
Right-of-use Asset (ROU)		$ 68,600
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	$ 409,500		$ 395,000
State interest rate	5.75%

Condensed Consolidated Financial Statements - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Current Assets
Other	$ 16,439	$ 14,260
Total other current assets	40,830	46,516
Other Current Liabilities
Settlement payables	23,552	31,605
Operating lease liabilities	14,334
Royalties payable	14,751	11,318
Vendor financed licenses	4,152	3,551
Accrued interest	4,848	8,407
Other	28,967	38,412
Total other current liabilities	90,604	93,293
Settlement deposits [Member]
Other Current Assets
Settlement current asset	10,549	23,651
Settlement receivables [Member]
Other Current Assets
Settlement current asset	$ 13,842	$ 8,605

Revenue - Additional Information (Detail) $ in Millions	3 Months Ended
Revenue - Additional Information (Detail) $ in Millions	Mar. 31, 2019 USD ($)
Revenue [Line Items]
Revenue allocated to remaining performance obligations	$ 628.3
Percentage of revenue allocated to remaining performance obligations to be recognized over the next 12 months	46.00%
Performance obligation satisfied in previous period	$ 3.9

Revenue - Total Receivables (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Billed receivables	$ 158,807	$ 239,275
Allowance for doubtful accounts	(3,663)	(3,912)
Billed receivables, net	155,144	235,363
Accrued receivables	320,575	336,858
Significant financing component	(32,562)	(35,029)
Total accrued receivables, net	288,013	301,829
Less current accrued receivables	120,569	123,053
Less current significant financing component	(9,963)	(10,234)
Total long-term accrued receivables, net	177,407	189,010
Total receivables, net	$ 443,157	$ 537,192

Revenue - Changes in Deferred Revenue (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Deferred Revenue Disclosure [Abstract]
Deferred revenue, beginning balance	$ 156,135
Deferral of revenue	42,533
Recognition of deferred revenue	(46,701)
Foreign currency translation	255
Deferred revenue, ending balance	$ 152,222

Acquisition - Additional Information (Detail) - SpeedPay [Member] $ in Millions			3 Months Ended
	May 09, 2019 USD ($) Customers	Apr. 05, 2019 USD ($)	Mar. 31, 2019 USD ($)
Business Acquisition [Line Items]
Acquisition-related costs			$ 4.7
Subsequent Event [Member]
Business Acquisition [Line Items]
Acquisition purchase price	$ 750.0
Number of customers \| Customers	4,000
Bank of America [Member] \| Subsequent Event [Member]
Business Acquisition [Line Items]
Line of credit facility, covenant terms		The amendment permitted the Company to borrow up to $500.0 million in the form of a senior secured term loan; extended the revolver and the term loan maturity date from February 24, 2022, to April 5, 2024; and increased the maximum consolidated senior secured net leverage ratio covenant from 3.50:1.00 to 3.75:1.00; among other things.
Bank of America [Member] \| Subsequent Event [Member] \| Senior Secured Term Loan [Member]
Business Acquisition [Line Items]
Line of credit facility, maximum borrowing capacity		$ 500.0
Bank of America [Member] \| Subsequent Event [Member] \| Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Line of credit, carrying amount		$ 250.0

Debt - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended
	Aug. 21, 2018	Feb. 24, 2017	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Other current liabilities			$ 4,152	$ 3,551
Long-term debt, amount outstanding			666,572	671,756
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unused borrowings			500,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit, amount outstanding			279,000
Long-term debt, amount outstanding			$ 279,023	284,959
Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, interest rate margin above federal fund rate			0.50%
Credit facility, interest rate margin above one-month LIBOR rate			1.00%
Credit facility, borrowing rate			4.25%
Credit Facility maturity date			Feb. 24, 2022
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
Credit Agreement [Member] \| Term Credit Facility [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity		$ 415,000
Credit facilities, maturity		5 years
Multi-year License Agreement [Member] \| Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Other current liabilities			$ 2,500
Other non-current liabilities			6,900
Outstanding other Long-term Debt			9,400
5.750% Senior Notes, due August 2026 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Issue price percentage of senior notes of the principal amount	100.00%
Stated interest rate	5.75%
Maturity date of senior notes	Aug. 15, 2026
Long-term debt, amount outstanding			$ 400,000	$ 400,000
Debt instrument, face amount	$ 400,000
6.375% Senior Notes, due August 2020 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Stated interest rate			6.375%
Parent Company and Domestic Subsidiaries [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			100.00%
Foreign Subsidiaries [Member] \| Credit Agreement [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			65.00%

Debt - Maturities on Long-Term Debt Outstanding (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Debt Disclosure [Abstract]
2019	$ 17,810
2020	23,747
2021	31,662
2022	205,804
2023	0
Thereafter	400,000
Total	$ 679,023

Debt - Summary of Total Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt issuance costs	$ (12,451)	$ (13,203)
Total debt	666,572	671,756
Less: current portion of term credit facility	20,788	20,767
Less: current portion of debt issuance costs	(2,959)	(2,980)
Total long-term debt	645,784	650,989
5.750% Senior Notes, due August 2026 [Member] \| Senior Notes [Member]
Debt Instrument [Line Items]
Total debt	400,000	400,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	279,023	284,959
Less: current portion of term credit facility	$ 23,747	$ 23,747

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 6,585	$ 6,362
Stock-based compensation expense, tax benefits	1,200	$ 1,000
Total Shareholder Return (TSRs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 31,600
Unrecognized compensation costs, weighted-average recognition period	2 years 3 months 18 days
Restricted Share Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested	173,547
Shares withheld to pay employees' portion of minimum payroll withholding taxes	53,274
Unrecognized compensation costs	$ 26,700
Unrecognized compensation costs, weighted-average recognition period	1 year 10 months 24 days
LTIP Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 3,000
Unrecognized compensation costs, weighted-average recognition period	1 year
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan, weighted-average grant date fair value of stock options granted		$ 7.03
Incentive plan, total intrinsic value of stock options exercised	$ 5,300	$ 7,200
Unrecognized compensation costs	$ 1,100
Unrecognized compensation costs, weighted-average recognition period	10 months 24 days
Restricted Share Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares vested	98,769
Shares withheld to pay employees' portion of minimum payroll withholding taxes	30,878
Unrecognized compensation costs	$ 1,900
Unrecognized compensation costs, weighted-average recognition period	10 months 24 days
Employee Stock Purchase Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP	32,174	38,145

Stock-Based Compensation - Summary of Stock Option Activity (Detail)	3 Months Ended
	Mar. 31, 2019 USD ($) $ / shares shares
Number of Shares
Outstanding, Beginning Balance \| shares	4,864,836
Exercised \| shares	(313,282)
Forfeited \| shares	(3,496)
Outstanding, Ending Balance \| shares	4,548,058
Number of Shares Exercisable, Ending Balance \| shares	3,946,163
Weighted-Average Exercise Price
Beginning Balance \| $ / shares	$ 17.76
Exercised \| $ / shares	15.50
Forfeited \| $ / shares	17.89
Ending Balance \| $ / shares	17.91
Weighted-Average Exercise Price Exercisable, Ending Balance \| $ / shares	$ 17.58
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	6 years 7 days
Weighted-Average Remaining Contractual Term (Years), Exercisable as of end of period	5 years 9 months 18 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period \| $	$ 68,018,687
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period \| $	$ 60,350,648

Stock-Based Compensation Plans - Grant Date Fair Value Weighted-Average Assumptions - Options (Detail) - Black-Scholes Option-Pricing Model [Member] - Stock Option [Member]	3 Months Ended
	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	5 years 7 months 6 days
Risk-free interest rate	2.70%
Expected volatility	26.40%
Expected dividend yield	0.00%

Stock-Based Compensation Plans - Summary of Nonvested LTIP Performance Shares (Detail) - LTIP Performance Shares [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Shares at Expected Attainment
Beginning Balance \| shares	540,697
Forfeited \| shares	(1,036)
Ending Balance \| shares	539,661
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 19.83
Forfeited \| $ / shares	20.12
Ending Balance \| $ / shares	$ 19.83

Stock-Based Compensation Plans - Summary of Nonvested RSAs (Detail) - Restricted Share Awards (RSAs) [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Shares
Beginning Balance \| shares	213,337
Vested \| shares	(98,769)
Forfeited \| shares	(3,975)
Ending Balance \| shares	110,593
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 20.21
Vested \| $ / shares	20.12
Forfeited \| $ / shares	20.12
Ending Balance \| $ / shares	$ 20.29

Stock-Based Compensation Plans - Summary of Nonvested TSRs (Detail) - Total Shareholder Return (TSRs) [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Shares
Beginning Balance \| shares	718,931
Granted \| shares	436,674
Forfeited \| shares	(5,457)
Ending Balance \| shares	1,150,148
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 29.25
Granted \| $ / shares	47.90
Forfeited \| $ / shares	31.31
Ending Balance \| $ / shares	$ 36.32

Stock-Based Compensation Plans - Grant Date Fair Value Weighted-Average Assumptions - TSRs (Detail) - Total Shareholder Return [Member] - Monte Carlo Simulation Model [Member]	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	2 years 9 months 18 days	2 years 10 months 24 days
Risk-free interest rate	2.50%	2.40%
Expected volatility	29.30%	28.00%
Expected dividend yield	0.00%	0.00%

Stock-Based Compensation Plans - Summary of Nonvested RSUs (Detail) - Restricted Share Units (RSUs) [Member]	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Shares
Beginning Balance \| shares	651,045
Granted \| shares	550,091
Vested \| shares	(173,547)
Forfeited \| shares	(8,346)
Ending Balance \| shares	1,019,243
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 23.82
Granted \| $ / shares	33.07
Vested \| $ / shares	23.36
Forfeited \| $ / shares	23.36
Ending Balance \| $ / shares	$ 28.90

Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 130,812		$ 137,228
Software, accumulated amortization	261,100		252,200
Other intangible assets amortization expense	5,500	$ 4,900
Software Marketed for Resale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	24,800		27,500
Software, amortization expense	3,000	3,600
Software Acquired or Developed for Internal Use [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	106,000		$ 109,700
Software, amortization expense	$ 10,400	$ 10,500

Software and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 314,805	$ 314,339
Accumulated Amortization	(151,960)	(146,212)
Net Balance	162,845	168,127
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	298,459	297,991
Accumulated Amortization	(136,628)	(131,187)
Net Balance	161,831	166,804
Trademarks and Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,346	16,348
Accumulated Amortization	(15,332)	(15,025)
Net Balance	$ 1,014	$ 1,323

Software and Other Intangible Assets - Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Net Balance	$ 162,845	$ 168,127
Software [Member]
Finite-Lived Intangible Assets [Line Items]
2019	37,383
2020	40,353
2021	27,637
2022	13,167
2023	6,633
Thereafter	5,639
Net Balance	130,812
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
2019	16,340
2020	20,992
2021	20,506
2022	20,359
2023	20,053
Thereafter	64,595
Net Balance	$ 162,845

Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,780	$ 4,127
Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,600
Operating Lease Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2,200

Corporate Restructuring and Other Organizational Changes - Components of Corporate Restructuring and Other Reorganization Activities from Prior Acquisitions (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 4,127
Amounts paid during the period	(389)
Foreign currency translation adjustments	42
Ending balance	$ 3,780

Common Stock and Treasury Stock - Additional Information (Detail) - USD ($)	3 Months Ended		79 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Feb. 28, 2018
Equity [Abstract]
Stock authorized to purchase under stock repurchase program				$ 200,000,000
Repurchase of common stock, shares	23,802	1,346,427	44,153,195
Repurchase of common stock, value	$ 631,000	$ 31,113,000	$ 548,500,000
Remaining value of shares authorized for purchase under the stock repurchase program	$ 176,000,000		$ 176,000,000

Loss Per Share - Additional Information (Detail) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Earnings Per Share [Abstract]
Options to purchase shares, RSUs, and contingently issuable shares excluded from the diluted loss per share computation	7,400,000	8,600,000
Common stock outstanding	116,530,435		116,123,361

Loss Per Share - Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Loss Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Weighted average shares outstanding:
Basic weighted average shares outstanding	116,090,000	115,642,000
Add: Dilutive effect of stock options and RSUs	0	0
Diluted weighted average shares outstanding	116,090,000	115,642,000

Other, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Foreign currency transaction gains (losses)	$ (1.9)	$ (0.1)

Segment Information - Additional Information (Detail)	3 Months Ended
Segment Information - Additional Information (Detail)	Mar. 31, 2019
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 three months ended March 31, 2019 and 2018.
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 three months ended March 31, 2019 and 2018.

Segment Information - Selected Financial Data (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenues	$ 205,855	$ 209,310
Depreciation and amortization expense	(24,852)	(24,993)
Stock-based compensation expense	(6,585)	(6,362)
Corporate and unallocated expenses	(24,662)	(20,014)
Interest, net	(8,581)	(6,621)
Other, net	(1,912)	(55)
Income (loss) before income taxes	(38,586)	(23,380)
Operating Segments [Member] \| ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues	96,007	105,030
Segment Adjusted EBITDA	28,268	38,898
Depreciation and amortization expense	3,030	2,975
Stock-based compensation expense	1,956	1,467
Operating Segments [Member] \| ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues	109,848	104,280
Segment Adjusted EBITDA	(262)	(4,233)
Depreciation and amortization expense	7,562	7,736
Stock-based compensation expense	1,951	1,463
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	14,260	14,282
Stock-based compensation expense	$ 2,678	$ 3,432

Segment Information - Selected Financial Data, Revenues and Long lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 205,855	$ 209,310
Long lived assets
Long lived assets	1,561,517		$ 1,528,930
Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	68,967	66,168
Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,513	22,007
Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,361	17,381
Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,018	22,218
Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,333	14,091
Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	62,663	67,445
Americas - United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	119,458	119,810
Long lived assets
Long lived assets	829,953		811,435
Americas - Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	13,688	19,103
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	54,519	50,695
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,190	19,702
Other [Member]
Long lived assets
Long lived assets	731,564		$ 717,495
Operating Segments [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	96,007	105,030
Operating Segments [Member] \| ACI On Premise [Member] \| Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,725	11,363
Operating Segments [Member] \| ACI On Premise [Member] \| Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,022	5,010
Operating Segments [Member] \| ACI On Premise [Member] \| Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,037	10,420
Operating Segments [Member] \| ACI On Premise [Member] \| Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14,715	13,641
Operating Segments [Member] \| ACI On Premise [Member] \| Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	60,508	64,596
Operating Segments [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	109,848	104,280
Operating Segments [Member] \| ACI On Demand [Member] \| Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	68,967	66,168
Operating Segments [Member] \| ACI On Demand [Member] \| Digital Channels [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,788	10,644
Operating Segments [Member] \| ACI On Demand [Member] \| Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,339	12,371
Operating Segments [Member] \| ACI On Demand [Member] \| Payment Intelligence [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,981	11,798
Operating Segments [Member] \| ACI On Demand [Member] \| Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	618	450
Operating Segments [Member] \| ACI On Demand [Member] \| Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,155	2,849
Operating Segments [Member] \| Americas - United States [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,422	30,864
Operating Segments [Member] \| Americas - United States [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	93,036	88,946
Operating Segments [Member] \| Americas - Other [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	10,945	16,784
Operating Segments [Member] \| Americas - Other [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,743	2,319
Operating Segments [Member] \| EMEA [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	42,451	38,686
Operating Segments [Member] \| EMEA [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	12,068	12,009
Operating Segments [Member] \| Asia Pacific [Member] \| ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,189	18,696
Operating Segments [Member] \| Asia Pacific [Member] \| ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,001	$ 1,006

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Income Taxes [Line Items]
Unrecognized tax benefit	$ 28.3		$ 28.4
Decrease in unrecognized tax benefits due to the expiration of statutes of limitations and the settlement of various audits	3.9
Accrued interest and penalties related to income tax liabilities	$ 1.2		$ 1.2
Effective tax rate	33.00%	17.00%
Losses of foreign entities	$ 6.1	$ 1.8

Leases - Additional Information (Detail) $ in Millions	Mar. 31, 2019 USD ($)
Operating leases not yet commenced, office facilities, amount	$ 3.7
Minimum [Member]
Operating leases not yet commenced, term of contract	1 year
Maximum [Member]
Operating leases not yet commenced, term of contract	7 years

Leases - Components of Lease Cost (Detail) $ in Thousands	3 Months Ended
Leases - Components of Lease Cost (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Operating lease cost	$ 4,036
Variable lease cost	986
Sublease income	(139)
Total lease cost	$ 4,883

Leases - Supplemental Cash Flow Information related to Leases (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 5,411
Right-of-use assets obtained in exchange for new lease obligations:
Operating leases	$ 1,218

Leases - Supplemental Balance Sheet Information related to Leases (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Assets:
Operating lease right-of-use assets	$ 60,978
Liabilities:
Other current liabilities	14,334
Operating lease liabilities	50,636
Total operating lease liabilities	$ 64,970
Weighted average remaining operating lease term	7 years 7 days
Weighted average operating lease discount rate	3.96%

Leases - Maturities on Lease Liabilities (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
2019	$ 12,471
2020	14,895
2021	10,915
2022	8,387
2023	6,698
Thereafter	21,122
Total lease payments	74,488
Less: imputed interest	9,518
Total operating lease liabilities	$ 64,970

Leases - Future Payments Under Operating Lease Agreements (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