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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2017	Oct. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q3
Trading Symbol	ACIW
Entity Registrant Name	ACI WORLDWIDE, INC.
Entity Central Index Key	0000935036
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		118,579,224

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 67,930	$ 75,753
Receivables, net of allowances of $4,157 and $3,873, respectively	182,269	268,162
Recoverable income taxes	5,935	4,614
Prepaid expenses	25,620	25,884
Other current assets	24,968	33,578
Total current assets	306,722	407,991
Noncurrent assets
Property and equipment, net	79,883	78,950
Software, net	164,470	185,496
Goodwill	909,691	909,691
Intangible assets, net	195,098	203,634
Deferred income taxes, net	121,839	77,479
Other noncurrent assets	37,186	39,054
TOTAL ASSETS	1,814,889	1,902,295
Current liabilities
Accounts payable	29,664	42,873
Employee compensation	47,702	47,804
Current portion of long-term debt	17,772	90,323
Deferred revenue	109,179	105,191
Income taxes payable	7,659	11,334
Other current liabilities	53,016	78,841
Total current liabilities	264,992	376,366
Noncurrent liabilities
Deferred revenue	47,669	49,863
Long-term debt	674,394	653,595
Deferred income taxes, net	19,788	26,349
Other noncurrent liabilities	36,737	41,205
Total liabilities	1,043,580	1,147,378
Commitments and contingencies (Note 12)
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued at September 30, 2017 and December 31, 2016
Common stock; $0.005 par value; 280,000,000 shares authorized; 140,525,055 shares issued at September 30, 2017 and December 31, 2016	702	702
Additional paid-in capital	620,974	600,344
Retained earnings	517,702	545,731
Treasury stock, at cost, 22,231,088 and 23,188,258 shares at September 30, 2017 and December 31, 2016, respectively	(288,495)	(297,760)
Accumulated other comprehensive loss	(79,574)	(94,100)
Total stockholders' equity	771,309	754,917
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,814,889	$ 1,902,295

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Receivables, allowances	$ 4,157	$ 3,873
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	22,231,088	23,188,258

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

3 Months Ended

9 Months Ended

Sep. 30, 2017

Sep. 30, 2016

Sep. 30, 2017

Sep. 30, 2016

Revenues

Software as a service and platform as a service

$ 99,761

$ 96,169

$ 312,677

$ 310,170

License

50,017

43,256

163,578

114,189

Maintenance

56,349

57,741

166,829

175,404

Services

19,608

19,809

54,712

63,208

Total revenues

225,735

216,975

697,796

662,971

Operating expenses

Cost of revenue

^[1]

107,393

100,267

336,293

334,085

Research and development

33,935

42,210

106,189

132,235

Selling and marketing

25,236

29,874

81,190

88,661

General and administrative

25,302

31,390

130,332

91,978

Gain on sale of CFS assets

489

(151,463)

Depreciation and amortization

22,446

22,098

67,189

66,688

Total operating expenses

214,312

226,328

721,193

562,184

Operating income (loss)

11,423

(9,353)

(23,397)

100,787

Other income (expense)

Interest expense

(9,374)

(9,838)

(30,198)

(29,967)

Interest income

165

145

421

416

Other

(1,059)

2,794

(2,176)

4,483

Total other income (expense)

(10,268)

(6,899)

(31,953)

(25,068)

Income (loss) before income taxes

1,155

(16,252)

(55,350)

75,719

Income tax expense (benefit)

(2,233)

(6,426)

(27,321)

12,875

Net income (loss)

$ 3,388

$ (9,826)

$ (28,029)

$ 62,844

Earnings (loss) per common share

Basic

$ 0.03

$ (0.08)

$ (0.24)

$ 0.53

Diluted

$ 0.03

$ (0.08)

$ (0.24)

$ 0.53

Weighted average common shares outstanding

Basic

118,254

116,118

117,096

117,606

Diluted

119,743

116,118

117,096

118,971

[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		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,388	$ (9,826)	$ (28,029)	$ 62,844
Other comprehensive income (loss):
Foreign currency translation adjustments	(594)	(2,228)	14,526	(4,887)
Total other comprehensive income (loss)	(594)	(2,228)	14,526	(4,887)
Comprehensive income (loss)	$ 2,794	$ (12,054)	$ (13,503)	$ 57,957

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (28,029)	$ 62,844
Adjustments to reconcile net income (loss) to net cash flows from operating activities:
Depreciation	18,658	16,130
Amortization	58,114	59,708
Amortization of deferred debt issuance costs	3,537	4,198
Deferred income taxes	(37,707)	(1,561)
Stock-based compensation expense	22,724	33,812
Gain on sale of CFS assets	0	(151,463)
Other	1,094	(407)
Changes in operating assets and liabilities, net of impact of acquisitions:
Receivables	80,398	34,784
Accounts payable	(11,610)	(15,898)
Accrued employee compensation	(1,056)	18,260
Current income taxes	(10,161)	5,691
Deferred revenue	(1,248)	3,663
Other current and noncurrent assets and liabilities	(9,642)	(4,905)
Net cash flows from operating activities	85,072	64,856
Cash flows from investing activities:
Purchases of property and equipment	(18,566)	(34,429)
Purchases of software and distribution rights	(21,328)	(19,211)
Proceeds from sale of CFS assets	0	199,481
Other	0	(7,000)
Net cash flows from investing activities	(39,894)	138,841
Cash flows from financing activities:
Proceeds from issuance of common stock	2,185	2,395
Proceeds from exercises of stock options	10,284	8,749
Repurchase of restricted stock for tax withholdings	(5,311)	(2,975)
Repurchases of common stock	0	(60,089)
Proceeds from revolving credit facility	42,000	52,000
Repayment of revolving credit facility	(126,000)	(166,000)
Proceeds from term portion of credit agreement	415,000	0
Repayment of term portion of credit agreement	(380,852)	(71,470)
Payment of debt issuance costs	(5,340)	(370)
Payments on other debt and capital leases	(9,286)	(13,538)
Net cash flows from financing activities	(57,320)	(251,298)
Effect of exchange rate fluctuations on cash	4,319	(3,726)
Net decrease in cash and cash equivalents	(7,823)	(51,327)
Cash and cash equivalents, beginning of period	75,753	102,239
Cash and cash equivalents, end of period	67,930	50,912
Supplemental cash flow information
Income taxes paid, net	24,693	11,986
Interest paid	$ 31,762	$ 31,107

Condensed Consolidated Financial Statements

9 Months Ended

Sep. 30, 2017

Accounting Policies [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 September 30, 2017, and for the three and nine months ended September 30, 2017 and 2016, 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, 2016 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, 2016, filed on March 1, 2017. Results for the three and nine months ended September 30, 2017 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 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.

Receivables, net

Receivables represent amounts billed and amounts earned that are to be billed in the near future. Included in accrued receivables are services, software as a service (“SaaS”) and platform as a service (“Platform”) revenues earned in the current period but billed in a subsequent period as well as license revenues that are fixed and determinable but billed in future periods.


(in thousands)	September 30, 2017			December 31, 2016
Billed Receivables	$	160,622		$	250,116
Allowance for doubtful accounts		(4,157	)		(3,873	)

Billed, net		156,465			246,243
Accrued Receivables		25,804			21,919

Receivables, net	$	182,269		$	268,162

Other Current Assets and Other Current Liabilities


(in thousands)	September 30, 2017		December 31, 2016
Settlement deposits	$	6,392	$	10,496
Settlement receivables		7,239		14,327
Other		11,337		8,755

Total other current assets	$	24,968	$	33,578


(in thousands)	September 30, 2017		December 31, 2016
Settlement payables	$	13,107	$	24,016
Accrued interest		2,469		7,356
Vendor financed licenses		2,092		9,213
Royalties payable		7,073		7,197
Other		28,275		31,059

Total other current liabilities	$	53,016	$	78,841

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 ACH payments. The Company creates a receivable for the amount due from the credit or debit card company and an offsetting payable to the client. Once confirmation is received that the funds have been received, the Company settles the obligation to the client. Due to timing, in some instances, the Company may receive the funds into bank accounts controlled by and in the Company’s name that are not disbursed to its clients by the end of the day resulting in a settlement deposit on the Company’s books.

Off Balance Sheet Accounts

The Company also enters into agreements with certain clients to process payment funds on their behalf. When an automated clearing house 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 September 30, 2017 and December 31, 2016 were $223.9 million and $270.0 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 Senior Notes was $305.4 million and $309.8 million at September 30, 2017 and December 31, 2016, 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

Changes in the carrying amount of goodwill attributable to each reporting unit with goodwill balances during the nine months ended September 30, 2017 were as follows:


(in thousands)	ACI On Demand		ACI On Premise			Total
Gross Balance prior to December 31, 2016	$	183,783	$	773,340		$	957,123
Total impairment prior to December 31, 2016		—		(47,432	)		(47,432	)

Balance, December 31, 2016		183,783		725,908			909,691
Adjustments		—		—			—

Balance, September 30, 2017	$	183,783	$	725,908		$	909,691

In accordance with the Accounting Standards Codification (“ASC 350”), Intangibles – Goodwill and Other, we assess goodwill for impairment annually during the fourth quarter of our 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. 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 our October 1, 2016 annual impairment test and there have been no indications of impairment in the subsequent periods.

The Company evaluates goodwill at the reporting unit level, and as discussed in Note 10, Segment Information, during the first quarter of 2017, it announced a change in organizational structure to better align with the Company’s strategic direction. This change in the Company’s operating segments also resulted in a change in reporting units to coincide with the new operating segments - ACI On Demand and ACI On Premise. The Company allocated goodwill to the new reporting units using a relative fair value approach. In addition, the Company performed an assessment of potential goodwill impairment for all reporting units immediately prior to the reallocation and determined that no impairment was indicated.

Recently Issued Accounting Standards Not Yet Effective

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (codified as “ASC 606”). ASC 606 will supersede the revenue recognition requirements in Accounting Standard Codification 605, Revenue Recognition, and most industry-specific guidance. The standard requires that entities recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which a company expects to be entitled in exchange for those goods or services. On July 9, 2015, the FASB deferred the effective date to fiscal years beginning after December 15, 2017, and for interim periods within those fiscal years. The Company will adopt the standard effective January 1, 2018 (the effective date). The standard permits the use of either the retrospective or modified retrospective transition method. The Company will adopt the standard under the modified retrospective transition method which will result in an adjustment to retained earnings for the cumulative effect of applying the standard to active contracts as of the adoption date. As this method does not result in recast of the prior year financial statements, ASC 606 requires the Company to provide additional disclosures during the year of adoption for the amount by which each financial statement line item is affected by adoption of the new standard and explanation of the reasons for significant changes.

During 2016, the Company began its detailed assessment of the impact of ASC 606 and completed its initial assessment of the impact on its license, maintenance, and services revenues. This assessment continued during early 2017, with increased focus on the impact of ASC 606 on SaaS and Platform revenues, detailed review of customer contracts under ASC 606 for each revenue stream, identification of key data requirements for contract reviews and necessary changes to processes, systems, and internal controls. As of September 30, 2017 the Company has completed its initial assessment of the impact of ASC 606 on all revenue streams. The Company has considered and evaluated the data necessary to comply with the expanded disclosures required under the new standard and has started to make changes to its processes and systems. The Company continues to evaluate the impact of the standard on its consolidated financial statements and related disclosures and is actively engaged in the process of preparing its transition adjustment under the modified retrospective transition method. The Company continues to believe that the most significant impacts relate to changes in the timing and amount of recognition for software license revenues and sales commission expenses and the expanded qualitative and quantitative disclosures required under the new standard. The Company expects revenue related to maintenance, services, and SaaS and Platform to remain substantially unchanged. While the Company continues to make progress in preparing for the adoption of ASC 606, work remains due to the complexity of applying ASC 606 to our contracts, the increased number of judgments and estimates required, and the volume of contracts that are subject to review. Accordingly, our assessment of ASC 606 will continue through the effective date.

As it relates to software license revenues, under ASC 606 the Company will recognize revenue in advance of billings for certain software license arrangements with extended payment terms as opposed to when payments become due and payable. Additionally, certain of those same software license arrangements will contain a significant financing component which will result in a change in the amount of the contract value that is allocated to software license revenue. Because the requirement to have vendor-specific objective evidence (“VSOE”) of fair value for undelivered elements is eliminated under the new standard, the Company expects the amounts allocated to software license, maintenance, and services revenues for most software license arrangements to be recognized as each element is delivered or provided to the customer. Under current U.S. GAAP, when software license arrangements include post contract customer support (maintenance or “PCS”) terms that fail to achieve VSOE of fair value, the Company recognizes all revenues in the arrangement ratably over the longer service period.

The Company has performed a detailed review of its active software license arrangements (as of August 31, 2017) including contracts with software license payment terms that extend beyond one year from the delivery of the software license and continue beyond December 31, 2017. The Company assessed whether those arrangements contain a significant financing component and, if so, calculated the amount of significant financing component at contract execution and the estimated remaining balance on January 1, 2018. Upon adoption of ASC 606, the Company will record an accrued receivable in its condensed consolidated balance sheet which represents the Company’s unconditional right to consideration at its present value (i.e. adjusted for the significant financing component) with an offsetting increase to retained earnings. The significant financing component will be recognized as interest income in the Company’s condensed consolidated statement of operations over the remaining contract term. The amounts allocated to the significant financing component would have been recognized as revenue under current U.S. GAAP.

The Company has determined that its SaaS-based and Platform-based arrangements represent a single promise to provide continuous access (i.e. a stand-ready obligation) to its software solutions and their processing capabilities in the form of a service through one of the Company’s data centers. As each day of providing access to the software solution(s) is substantially the same and the customer simultaneously receives and consumes the benefits as access is provided, the Company has determined that its SaaS-based and Platform-based arrangements include a single performance obligation comprised of a series of distinct services. The Company’s SaaS-based and Platform-based arrangements may include fixed consideration, variable consideration or a combination of the two. Variable consideration in these arrangements is typically a function of a tier-based pricing structure that provides that customer with levels of transaction volume that “reset” with varying frequencies (e.g. monthly, quarterly or annually) and the corresponding rate per transaction within each level. Depending upon the structure of a particular arrangement, the Company will either: (1) allocate the variable amount to each distinct service period within the series and recognize revenue as each distinct service period is performed (i.e. direct allocation), (2) estimate total variable consideration at contract inception (giving consideration to any constraints that may apply) and recognize the total transaction price over the period to which it relates, or (3) apply ‘right to invoice’ practical expedient. At this time, the Company believes that revenue from most of its SaaS-based and Platform-based arrangements will be recognized under the direct allocation method or by applying the ‘right to invoice’ practical expedient, which will result in the same pattern of recognition as under current U.S. GAAP.

The Company has determined that most of its sales commissions meet the definition of incremental costs of obtaining a contract. Accordingly, the costs associated with those sales commissions will be capitalized and expense recognized as the related goods or services are transferred to the customer. The Company currently recognizes sales commission expenses as they are incurred. Upon adoption of ASC 606, the Company will record an asset in its condensed consolidated balance sheet (as part of the transition adjustment) for the amount of unamortized sales commissions that were incurred in obtaining contracts in prior periods with an offsetting increase to retained earnings. The Company will recognize the capitalized sales commissions as a selling and marketing expense in the Company’s condensed consolidated statement of operations over a period that is consistent with the transfer of the goods and services to which the asset relates.

In February 2016, the FASB issued ASU 2016-02, Leases. This standard requires a lessee to record on the balance sheet the assets and liabilities for the rights and obligations created by leases with lease terms of more than 12 months. In addition, this standard requires both lessees and lessors to disclose certain key information about lease transactions. This standard will be effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. The Company will adopt the standard effective January 1, 2019. During the nine months ended September 30, 2017, the Company began its detailed assessment of the impact of ASU 2016-02. While the Company continues to evaluate the impact of the standard on its condensed consolidated financial statements and related disclosures, at this time the Company cannot estimate the quantitative impact of adopting the new standard.

In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments, an update that addresses how certain cash receipts and cash payments are presented and classified in the statement of cash flows. Among the cash flow matters addressed in the update are payments for costs related to debt prepayments or extinguishments, payments related to settlement of certain types of debt instruments, payments of contingent consideration made after a business combination, proceeds from insurance claims and corporate-owned life insurance policies, and distributions received from equity method investees, among others. The standard is effective for fiscal year beginning after December 31, 2017, including interim periods within that fiscal year. Early adoption is permitted, including adoption in an interim period. If an entity early adopts the amendments in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period, and all of the amendments must be adopted together in the same period. The amendments will be applied using a retrospective transition method to each period presented, unless impracticable for specific cash flow matters, in which case the amendments would be applied prospectively as of the earliest date practicable. The Company does not expect the impact of ASU 2016-15 to be material to its consolidated statement of cash flows.

In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other than Inventory, to simplify the accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Currently, U.S. GAAP prohibits the recognition of current and deferred income taxes for an intra-entity asset transfer until the asset has been sold to an outside party. This prohibition on recognition is an exception to the principle of comprehensive recognition of current and deferred income taxes in U.S. GAAP. The limited amount of authoritative guidance about the exception has led to diversity in practice and is a source of complexity in financial reporting, particularly for an intra-entity transfer of intellectual property. Under the amendments of ASU 2016-16, an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. Consequently, this amendment eliminates the exception for an intra-entity transfer of an asset other than inventory. The standard is effective for fiscal year beginning after December 15, 2017, including interim reporting periods within that fiscal year. Early adoption is permitted as of the beginning of an annual reporting period for which financial statements have not been issued or made available for issuance. The amendments to this ASU should be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company is currently assessing the impact of ASU 2016-16 on its financial position, results of operations, and cash flow.

In January 2017, the FASB issued ASU 2017-04, Simplifying the Test for Goodwill Impairment, an update that eliminates Step 2 from the goodwill impairment test. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value at the impairment testing date of its assets and liabilities, including unrecognized assets and liabilities. Under the amendments in ASU 2017-04, an entity should perform its annual or interim goodwill test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value. However, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. An entity no longer will determine goodwill impairment by calculating the implied fair value of goodwill by assigning the fair value of a reporting unit to all of its assets and liabilities as if that reporting unit had been acquired in a business combination. The standard is effective for annual or interim goodwill impairment tests in fiscal years beginning December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed on testing dates after January 1, 2017. The Company is currently assessing the impact of ASU 2017-04 on its annual goodwill impairment test and possible early adoption.

In May 2017, the FASB issued ASU 2017-09, Scope of Modification Accounting, an update that provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting under ASC 718, Compensation – Stock Compensation. Under the amendments in ASU 2017-09, an entity should account for the effects of a modification unless all of the following criteria are met: 1) the fair value of the modified award is the same as the fair value of the original award immediately before the original award is modified - if the modification does not affect any of the inputs to the valuation technique that the entity uses to value the award, the entity is not required to estimate the value immediately before and after the modification; 2) the vesting conditions of the modified award are the same as the conditions of the original award immediately before the original award is modified; 3) the classification of the modified award as an equity instrument or a liability instrument is the same as the classification of the original award immediately before the original award is modified. The standard is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017. Early adoption is permitted, including adoption in any interim period for which financial statements have not yet been issued. The Company has elected to early adopt these amendments prospectively in the second quarter of 2017. The adoption did not have a material effect on the Company’s financial position, results of operations, or cash flow as of and for the nine months ended September 30, 2017.

Divestiture	9 Months Ended
Divestiture	Sep. 30, 2017
Disposal Group, Not Discontinued Operation, Disposal Disclosures [Abstract]
Divestiture	2. Divestiture Community Financial Services On March 3, 2016, the Company completed the sale of its Community Financial Services (“CFS”) related assets and liabilities, to Fiserv, Inc. (“Fiserv”) for $200.0 million. The sale of CFS, which was not aligned with the Company’s long-term strategy, is part of the Company’s ongoing efforts to expand as a provider of software products, SaaS and Platform solutions facilitating real-time electronic and eCommerce payments for large financial institutions, intermediaries, retailers, and billers worldwide. The sale included employee agreements and customer contracts as well as technology assets and intellectual property. For the nine months ended September 30, 2016, the Company recognized a net after-tax gain of $93.4 million on the sale of assets to Fiserv. This gain includes final post-closing adjustments pursuant to the definitive transaction agreement of $0.5 million recognized during the three months ended September 30, 2016. The Company and Fiserv also entered into a Transition Services Agreement (“TSA”), whereby the Company continues to perform certain functions on Fiserv’s behalf during the migration period. The TSA is meant to reimburse the Company for direct costs incurred in order to provide such functions which are no longer generating revenue for the Company.

Debt

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Debt

3. Debt

As of September 30, 2017, the Company had $4.0 million, $399.4 million, and $300.0 million outstanding under its Revolving Credit Facility, Term Credit Facility and Senior Notes, respectively, with up to $496.0 million of unused and available 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. (“BofA”), as Administrative Agent, providing for revolving loans, swingline loans, letters of credit, and a term loan. The Credit Agreement consists of a five-year $500.0 million senior secured revolving credit facility (the “Revolving Credit Facility”), which includes a sublimit for the issuance of standby letters of credit and a sublimit for swingline loans, and $415.0 million under the five-year senior secured term loan facility (the “Term Credit Facility” and, together with the Revolving Credit Facility, the “Credit Facility”). The Credit Agreement also allows the Company to request optional incremental term loans and increases in the revolving commitment.

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

Borrowings under the Credit Facility bear interest at a rate per annum equal to, at the Company’s option, either (a) a base rate determined by reference to the highest of (1) the rate of interest per annum publicly announced by the Administrative Agent as its Prime Rate, (2) the federal funds effective rate plus 1/2 of 1% and (3) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for a one-month interest period adjusted for certain additional costs plus 1% or (b) a LIBOR rate determined by reference to the costs of funds for U.S. dollar deposits for the interest period relevant to such borrowing adjusted for certain additional costs, in each case plus an applicable margin. The applicable margin for borrowings under the Credit Facility is, based on the calculation of the applicable consolidated total leverage ratio, between 0.25% to 1.25% with respect to base rate borrowings and between 1.25% and 2.25% with respect to LIBOR rate borrowings. Interest is due and payable monthly. The interest rate in effect at September 30, 2017 for the Credit Facility was 2.99%.

In addition to paying interest on the outstanding principal under the Credit Facility, the Company is required to pay a commitment fee in respect of the unutilized commitments under the Revolving Credit Facility, payable quarterly in arrears. The Company is also required to pay 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 a per annum basis, payable quarterly in arrears, as well as customary fronting fees for the issuance of letters of credit fees and agency fees.

The Company’s obligations under the Credit Facility and certain hedging arrangements 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.

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.

The Credit Agreement also contains certain customary affirmative covenants and events of default. If an event of default, as specified in the Credit Agreement, shall occur and be continuing, the Company may be required to repay all amounts outstanding under the Credit Facility.

Letter of Credit

On February 29, 2016, the Company entered into a standby letter of credit (the “Letter of Credit”), under the terms of the Credit Agreement, for $25.0 million. On October 26, 2016, the Letter of Credit was renewed at $7.5 million. On June 15, 2017, the Letter of Credit was renewed at $5.0 million. The Company cancelled the Letter of Credit on August 24, 2017.

Senior Notes

On August 20, 2013, the Company completed a $300.0 million offering of Senior Notes at an issue price of 100% of the principal amount in a private placement for resale to qualified institutional buyers. The Senior Notes bear an interest rate of 6.375% per annum, payable semi-annually in arrears on August 15 and February 15 of each year, commencing on February 15, 2014. Interest began accruing on August 20, 2013.

Maturities on long-term debt outstanding at September 30, 2017 are as follows:


Fiscal year ending December 31,
(in thousands)
2017	$	5,188
2018		20,750
2019		31,125
2020		331,125
2021		41,500
Thereafter		273,750

Total	$	703,438

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

The Credit Facility will mature on February 24, 2022 and the Senior Notes will mature on August 15, 2020. The Revolving Credit Facility and Senior Notes do not amortize and the Term Credit Facility does amortize, with principal payable in consecutive quarterly installments.

The Credit Agreement and Senior 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. If an event of default, as specified in the Credit Agreement and Senior Notes agreement, shall occur, the Company may be required to repay all amounts outstanding under the Credit Facility and Senior Notes. On June 27, 2017, the Company and the Administrative Agent entered into an amendment to the Credit Agreement. The amendment revised the definition of “Consolidated EBITDA” to exclude the expense from the BHMI judgment and related fees, expenses, and interest thereto, up to $50 million from the calculation in the period recorded. As of September 30, 2017, and at all times during the period, the Company was in compliance with its debt covenants.


(in thousands)	As of September 30, 2017			As of December 31, 2016
Term Credit Facility	$	399,438		$	365,290
Revolving Credit Facility		4,000			88,000
6.375% Senior Notes, due August 2020		300,000			300,000
Debt issuance costs		(11,272	)		(9,372	)

Total debt		692,166			743,918
Less current portion of Term Credit Facility		20,750			95,293
Less current portion of debt issuance costs		(2,978	)		(4,970	)

Total long-term debt	$	674,394		$	653,595

Stock-Based Compensation Plans

9 Months Ended

Sep. 30, 2017

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

Stock-Based Compensation Plans

4. Stock-Based Compensation Plans

Employee Stock Purchase Plan

On April 6, 2017, the Board of Directors approved the 2017 Employee Stock Purchase Plan (“2017 ESPP”), which was approved by shareholders at the 2017 Annual Shareholder meeting. The 2017 ESPP provides employees with an opportunity to purchase shares of Common Stock in the Company. The 1999 Employee Stock Purchase Plan terminated upon the August 1, 2017 effective date of the 2017 ESPP. Under the Company’s 2017 ESPP a total of 3,000,000 shares of the Company’s common stock have been reserved for issuance to eligible employees. Participating employees are permitted to designate up to the lesser of $25,000 or 10% of their annual base compensation for the purchase of common stock under the ESPP. Purchases under the ESPP are made one calendar month after the end of each fiscal quarter. The price for shares of common stock purchased under the ESPP is 85% of the stock’s fair market value on the last business day of the three-month participation period. Shares issued under the ESPP during the nine months ended September 30, 2017 and 2016 totaled 121,765 and 141,484, respectively.

Stock-Based Payments

A summary of stock options issued pursuant to the Company’s stock incentive plans is as follows:


	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, 2016		6,791,375		$	15.54
Granted		864,800			20.12
Exercised		(756,140	)		13.60
Forfeited		(207,559	)		18.46
Expired		(17,507	)		20.36

Outstanding as of September 30, 2017		6,674,969		$	16.25		6.60	$	43,563,796

Exercisable as of September 30, 2017		3,938,286		$	14.45		5.31	$	32,792,014

The weighted-average grant date fair value of stock options granted during the nine months ended September 30, 2017 and 2016 was $6.24 and $5.59, respectively. The Company issued treasury shares for the exercise of stock options during the nine months ended September 30, 2017 and 2016. The total intrinsic value of stock options exercised during the nine months ended September 30, 2017 and 2016 was $6.6 million and $6.7 million, respectively.

For options that do not vest based on the achievement of certain market conditions the grant date fair values were estimated on the date of grant using the Black-Scholes option-pricing model, a pricing model acceptable under U.S. GAAP, with the following weighted-average assumptions:


	Nine Months Ended September 30, 2017			Nine Months Ended September 30, 2016
Expected life (years)		5.6			5.9
Interest rate		1.9	%		1.2	%
Volatility		29.4	%		29.7	%
Dividend yield		—			—

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

During the nine months ended September 30, 2016, the Company granted stock options with three tranches at a grant date fair value of $7.46, $7.06, and $6.50, respectively, per share. These options vest, if at all, based upon (i) tranche one - any time after the third anniversary date if the stock has traded at 133% of the exercise price for at least 20 consecutive trading days, (ii) tranche two - any time after the fourth anniversary date if the stock has traded at 167% of the exercise price for at least 20 consecutive trading days, and (iii) tranche three - any time after the fifth anniversary date if the stock has traded at 200% of the exercise price for at least 20 consecutive trading days. The employees must also remain employed with the Company as of the anniversary date in order for the options to vest. The exercise price of the stock options is the closing market price on the date the awards were granted. In order to determine the grant date fair value of the stock options, a Monte Carlo simulation model was used.

With respect to options granted that vest based on the achievement of certain market conditions, the grant date fair value of such options was estimated using the following weighted-average assumptions:


	Nine Months Ended September 30, 2016
Expected life (years)		7.5
Interest rate		1.6	%
Volatility		41.6	%
Dividend yield		—

A summary of nonvested long-term incentive program performance share awards (“LTIP Performance Shares”) outstanding as of September 30, 2017 and changes during the period are as follows:


Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016		1,738,056		$	18.45
Granted		553,549			20.12
Forfeited		(150,241	)		18.77

Nonvested as of September 30, 2017		2,141,364		$	18.86

A summary of nonvested restricted share awards (“RSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Restricted Share Awards	Number of Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		172,108		$	20.62
Granted		560,174			20.61
Vested		(120,869	)		20.72
Forfeited		(79,665	)		20.47

Nonvested as of September 30, 2017		531,748		$	20.60

During the nine months ended September 30, 2017, a total of 120,869 shares of the RSAs vested. The Company withheld 3,311 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

A summary of nonvested Performance-Based Restricted Share Awards (“PBRSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Performance-Based Restricted Share Awards	Number of Performance-Based Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		683,667		$	23.25
Vested		(484,835	)		22.82
Forfeited		(11,604	)		(23.84	)
Change in attainment for 2015 grants		(13,592	)		23.25

Nonvested as of September 30, 2017		173,636		$	24.41

During the nine months ended September 30, 2017, a total of 484,835 shares of the PBRSAs vested. The Company withheld 178,351 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

Through December 31, 2016, the Company had accrued the compensation costs assuming an attainment level of 100% for the PBRSA grants vesting based upon forecasted 2016 earnings before income taxes, interest, depreciation and amortization (“EBITDA”). During the nine months ended September 30, 2017, the Company changed the expected attainment on the PBRSAs vesting in June 2017 and June 2018 from 100% to 98% based upon actual results of the related performance target.

A summary of nonvested Retention Restricted Share Awards (“Retention RSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Retention Restricted Share Awards	Number of Retention Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		205,540		$	17.89
Vested		(205,540	)		17.89

Nonvested as of September 30, 2017		—		$	—

During the nine months ended September 30, 2017, a total of 205,540 shares of the Retention RSAs vested. The Company withheld 75,198 of those shares to pay the employees’ portion of the minimum payroll withholding taxes.

A summary of nonvested PAY.ON RSAs as of September 30, 2017 and changes during the period are as follows:


Nonvested PAY.ON RSAs	Number of PAY.ON RSAs			Grant Date Fair Value
Nonvested at December 31, 2016		238,376		$	23.60
Forfeited		(119,188	)		23.60
Vested		(59,594	)		23.60

Nonvested at September 30, 2017		59,594		$	23.60

During the nine months ended September 30, 2017, the Company granted total shareholder return (“TSR”) awards, pursuant to the 2016 Equity and Performance Incentive Plan, to certain executive officers. TSRs are performance shares that are earned, if at all, based upon the Company’s total shareholder return as compared to a group of peer companies over a three-year performance period. The award payout can range from 0% to 200%. In order to determine the grant date fair value of the TSRs, a Monte Carlo simulation model is used. The Company recognizes compensation expense for TSRs over a three-year performance period based on the grant date fair value.

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


	Nine Months Ended September 30, 2017
Expected life (years)		2.9
Interest rate		1.5	%
Volatility		26.5	%
Dividend Yield		—

A summary of nonvested TSRs outstanding as of September 30, 2017 and changes during the period are as follows:


Nonvested Total Shareholder Return Awards	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016		—		$	—
Granted		233,077			24.37
Forfeited		(8,624	)		24.37

Nonvested as of September 30, 2017		224,453		$	24.37

As of September 30, 2017, there were unrecognized compensation costs of $10.4 million related to nonvested stock options, $8.6 million related to the nonvested RSAs, $18.0 million related to the LTIP performance shares, $1.0 million related to nonvested PBRSAs, and $4.4 million related to the TSRs, which the Company expects to recognize over weighted-average periods of 1.6 years, 2.1 years, 1.9 years, 0.7 years, and 2.4 years, respectively.

The Company recorded stock-based compensation expenses recognized under ASC 718 for the three months ended September 30, 2017 and 2016 related to stock options, LTIP performance shares, RSAs, PBRSAs, Retention RSAs, TSRs, and the ESPP of $8.1 million and $10.8 million, respectively, with corresponding tax benefits of $2.7 million and $4.1 million, respectively. The Company recorded stock-based compensation expenses recognized under ASC 718 for the nine months ended September 30, 2017 and 2016 related to stock options, LTIP performance shares, RSAs, PBRSAs, Retention RSAs, TSRs, and the ESPP of $22.7 million and $33.8 million, respectively, with corresponding tax benefits of $7.7 million and $12.7 million, respectively.

The Company recognizes compensation costs for stock option awards that vest with the passage of time with only service conditions on a straight-line basis over the requisite service period. The Company recognizes compensation costs for stock option awards that vest with service and market-based conditions on a straight-line basis over the longer of the requisite service period or the estimated period to meet the defined market-based condition.

Software and Other Intangible Assets

9 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Software and Other Intangible Assets

5. Software and Other Intangible Assets

At September 30, 2017, software net book value totaling $164.5 million, net of $221.0 million of accumulated amortization, includes the net book value of software marketed for external sale of $44.1 million. The remaining software net book value of $120.4 million is comprised of various software that has been acquired or developed for internal use.

At December 31, 2016, software net book value totaled $185.5 million, net of $195.0 million of accumulated amortization. Included in this amount is software marketed for external sale of $52.3 million. The remaining software net book value of $133.2 million is comprised of various software that has been acquired or developed for internal use.

Quarterly amortization of software marketed for external sale is computed using the greater of the ratio of current revenues to total estimated revenues expected to be derived from the software or the straight-line method over an estimated useful life of three to ten years. Software for resale amortization expense recorded in the three months ended September 30, 2017 and 2016 totaled $3.1 million and $2.9 million, respectively. Software for resale amortization expense recorded in the nine months ended September 30, 2017 and 2016 totaled $9.6 million and $9.2 million, respectively. These software amortization expense amounts are reflected in cost of revenue in the condensed consolidated statements of operations.

Quarterly amortization of software for internal use is computed using the straight-line method over an estimated useful life of three to ten years. Software for internal use includes software acquired through acquisitions that is used to provide certain of our SaaS and Platform offerings. Amortization of software for internal use of $11.5 million and $11.3 million for the three months ended September 30, 2017 and 2016, respectively. Amortization of software for internal use of $34.1 million and $34.2 million for the nine months ended September 30, 2017 and 2016, respectively. These software amortization expense amounts are included in depreciation and amortization in the condensed consolidated statements of operations.

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


	September 30, 2017							December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	303,708	$	(111,783	)	$	191,925	$	295,730	$	(96,356	)	$	199,374
Trademarks and tradenames		16,579		(13,406	)		3,173		16,019		(11,759	)		4,260

	$	320,287	$	(125,189	)	$	195,098	$	311,749	$	(108,115	)	$	203,634

Other intangible assets amortization expense for the three months ended September 30, 2017 and 2016 totaled $4.9 million and $5.3 million, respectively. Other intangible assets amortization expense for the nine months ended September 30, 2017 and 2016 totaled $14.5 million and $16.4 million, respectively. These intangible amortization expense amounts are included in depreciation and amortization in the condensed consolidated statements of operations.

Based on capitalized software and other intangible assets at September 30, 2017, estimated amortization expense for future fiscal years is as follows:


Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
(in thousands)
Remainder of 2017	$	14,256	$	4,892
2018		47,196		19,061
2019		39,324		18,505
2020		29,967		17,609
2021		19,542		17,103
2022		8,394		16,942
Thereafter		5,791		100,986

Total	$	164,470	$	195,098

Corporate Restructuring and Other Organizational Changes

9 Months Ended

Sep. 30, 2017

Restructuring and Related Activities [Abstract]

Corporate Restructuring and Other Organizational Changes

6. Corporate Restructuring and Other Organizational Changes

During the nine months ended September 30, 2017, the Company ceased use of its leased facility in Edison, NJ, which resulted in additional expense of $0.4 million that was recorded in general and administrative expenses in the accompanying condensed consolidated statements of operations.

The components of corporate restructuring and other reorganization activities are included in the following table:


(in thousands)	Facility Closures
Balance, December 31, 2016	$	4,559
Restructuring charges incurred		363
Amounts paid during the period		(956	)
Foreign currency translation		199

Balance, September 30, 2017	$	4,165

Of the $4.2 million facility closure liability, $1.2 million and $3.0 million is recorded in other current and noncurrent liabilities, respectively, in the accompanying condensed consolidated balance sheet at September 30, 2017.

Common Stock and Treasury Stock	9 Months Ended
Common Stock and Treasury Stock	Sep. 30, 2017
Equity [Abstract]
Common Stock and Treasury Stock	7. Common Stock and Treasury Stock As of September 12, 2012, the Company’s Board of Directors (“the Board”) had approved a stock repurchase program authorizing the Company, from time to time as market and business conditions warrant, to acquire up to $262.1 million of its common stock. On September 13, 2012, the Board approved the repurchase of up to 7,500,000 shares of the Company’s common stock, or up to $113.0 million, in place of the remaining repurchase amounts previously authorized. In July 2013 and again in February 2014, the Board approved an additional $100.0 million for the stock repurchase program for a total of an additional $200.0 million. The Company did not repurchase any shares under the program during the nine months ended September 30, 2017. Under the program to date, the Company has repurchased 40,129,393 shares for approximately $455.9 million. The maximum remaining authorized for purchase under the stock repurchase program was approximately $78.2 million as of September 30, 2017.

Earnings (Loss) Per Share

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Earnings (Loss) Per Share

8. Earnings (Loss) Per Share

Basic earnings (loss) per share is computed on the basis of weighted average outstanding common shares. Diluted earnings (loss) per share is computed on the basis of basic weighted average outstanding common shares adjusted for the dilutive effect of stock options and other outstanding dilutive securities.

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Weighted average shares outstanding:
Basic weighted average shares outstanding		118,254		116,118		117,096		117,606
Add: Dilutive effect of stock options		1,489		—		—		1,365

Diluted weighted average shares outstanding		119,743		116,118		117,096		118,971

The diluted earnings (loss) per share computation excludes 3.3 million and 10.1 million options to purchase shares, contingently issuable shares and restricted share awards during the three and nine months ended September 30, 2017, respectively, as their effect would be anti-dilutive. The diluted earnings (loss) per share computation excludes 9.9 million and 6.1 million options to purchase shares, restricted share awards, and contingently issuable shares during the three and nine months ended September 30, 2016, respectively, as their effect would be anti-dilutive.

Common stock outstanding as of September 30, 2017 and December 31, 2016 was 118,293,967 and 117,336,797, respectively.

Other	9 Months Ended
Other	Sep. 30, 2017
Other Income and Expenses [Abstract]
Other	9. Other Other is comprised of foreign currency transaction gains (losses) of $(1.1) million and $2.8 million for the three months ended September 30, 2017 and 2016, respectively. Other is comprised of foreign currency transaction gains (losses) of $(2.2) million and $4.5 million for the nine months ended September 30, 2017 and 2016, respectively.

Segment Information

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Segment Information

10. Segment Information

In January 2017, the Company announced a change in organizational structure to align with its strategic direction. As a result, beginning January 1, 2017, the Company reports financial performance based on its new segments, ACI On Premise and ACI On Demand, and analyzes operating income as a measure of segment profitability.

The Company’s chief operating decision maker (“CODM”), which is also our Chief Executive Officer, together with other senior management personnel, focus their review of consolidated financial information and the allocation of resources based upon the operating results, including revenues and operating income, for the segments ACI On Premise and ACI On Demand, separate from the 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, custom solutions, which are often part of a larger system located and managed at the customer site. These customers require a level of control, customization, 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 retail and financial institutions who use payments to facilitate their core business. The Company sees an increasing number of customers opting for software as a service and platform as a service offerings, which offer reduced complexity and cost as well as the ability to rapidly implement and scale.

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.

Corporate and other 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, amortization of acquisition-related intangibles, and other costs that are not considered when management evaluates segment performance. For the nine months ended September 30, 2017, Corporate and other includes $46.7 million of general and administrative expense for the legal judgment discussed in Note 12. For the nine months ended September 30, 2016, Corporate and other also includes revenue and operating income from the operations and sale of CFS related assets and liabilities of $15.4 million and $151.7 million, respectively.

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


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Revenues:
ACI On Premise	$	126,006		$	120,618		$	385,108		$	349,904
ACI On Demand		99,729			96,357			312,688			297,651
Corporate and other		—			—			—			15,416

	$	225,735		$	216,975		$	697,796		$	662,971

Depreciation and amortization expense:
ACI On Premise	$	3,321		$	3,616		$	9,915		$	10,961
ACI On Demand		8,576			7,308			25,973			21,665
Corporate and other		13,656			14,059			40,884			43,212

	$	25,553		$	24,983		$	76,772		$	75,838

Stock-based compensation expense:
ACI On Premise	$	1,869		$	1,770		$	4,984		$	5,222
ACI On Demand		1,865			1,766			4,973			5,209
Corporate and other		4,350			7,258			12,767			23,381

	$	8,084		$	10,794		$	22,724		$	33,812

Operating income (loss):
ACI On Premise	$	59,947		$	47,523		$	181,161		$	120,718
ACI On Demand		(11,683	)		(8,089	)		(39,740	)		(28,653	)
Corporate and other		(36,841	)		(48,787	)		(164,818	)		8,722

	$	11,423		$	(9,353	)	$	(23,397	)	$	100,787

Assets are not allocated to segments and the Company’s CODM does not evaluate operating segments using discrete asset information.

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Revenues:
United States	$	120,859	$	117,407	$	386,436	$	376,322
Other		104,876		99,568		311,360		286,649

	$	225,735	$	216,975	$	697,796	$	662,971


	September 30,		December 31,
	2017		2016
Long lived assets
United States	$	769,054	$	752,442
Other		617,274		664,383

	$	1,386,328	$	1,416,825

No single customer accounted for more than 10% of the Company’s consolidated revenues during the three and nine months ended September 30, 2017 and 2016. No other country outside the United States accounted for more than 10% of the Company’s consolidated revenues during the three and nine months ended September 30, 2017 and 2016.

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company reported a tax benefit for the three months ended September 30, 2017 while reporting a pretax profit for the same period. The resulting effective tax rate is a negative 193%. The effective tax rate for the nine months ended September 30, 2017 was 49%. The earnings of the Company’s foreign entities for the three and nine months ended September 30, 2017 were $15.2 million and $40.6 million. The tax rates in the foreign jurisdictions in which the Company operates are less than the domestic tax rate. The effective tax rates for the three and nine months ended September 30, 2017 were impacted by profits and losses in certain foreign jurisdictions taxed at lower rates and domestic losses taxed at higher rates. The effective tax rates for the three and nine months ended September 30, 2016 were 40% and 17%, respectively. The earnings of the Company’s foreign entities for the three and nine months ended September 30, 2016 were $16.4 million and $44.0 million, respectively. The tax rates in the foreign jurisdictions in which the Company operates are less than the domestic tax rate. The effective tax rate for the three and nine months ended September 30, 2016 was reduced by foreign profits taxed at lower rates. The effective tax rate for the three months ended September 30, 2016 was increased by the establishment of a $4.7 million valuation allowance against foreign tax credits existing in the US that were expected to expire before they can be utilized. The effective tax rate for the nine months ended September 30, 2016 was also reduced by a net release of $5.4 million valuation allowance previously established against foreign tax credits that were expected to be fully utilized as a result of the sale of the CFS assets and liabilities. The Company’s effective tax rate could fluctuate significantly on a quarterly basis and could be negatively affected to the extent earnings are lower in the countries in which it operates that have a lower statutory rate or higher in the countries in which it operates that have a higher statutory rate or to the extent it has losses sustained in countries where the future utilization of losses are uncertain. 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. The amount of unrecognized tax benefits for uncertain tax positions was $25.6 million as of September 30, 2017 and $24.3 million as of December 31, 2016, excluding related liabilities for interest and penalties of $1.5 million and $1.9 million as of September 30, 2017 and December 31, 2016, respectively. The Company believes it is reasonably possible that the total amount of unrecognized tax benefits will decrease within the next 12 months by approximately $1.4 million, due to the settlement of various audits and the expiration of statutes of limitation.

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Legal Proceedings On September 23, 2015, a jury verdict was returned against ACI Worldwide Corp. (“ACI Corp.”), a subsidiary of the Company, for $43.8 million in connection with counterclaims brought by Baldwin Hackett & Meeks, Inc. (“BHMI”) in the District Court of Douglas County, Nebraska. On September 21, 2012, ACI Corp. had sued BHMI for misappropriation of ACI Corp.’s trade secrets. The jury found that ACI Corp. had not met its burden of proof regarding these claims. On March 6, 2013, BHMI asserted counterclaims for breach of a non-disclosure agreement, tortious interference and violation of the Nebraska anti-monopoly statute, all of which were alleged to arise out of ACI Corp.’s filing of its lawsuit. On September 23, 2015, the jury found for BHMI on its counterclaims and awarded $43.8 million in damages. On January 5, 2016, the court entered a judgment against ACI Corp. for $43.8 million for damages and $2.7 million for attorney fees and costs. ACI Corp. disagreed with the verdicts and judgment, and after the trial court denied ACI Corp.’s post-judgment motions, on March 31, 2016, ACI Corp. perfected an appeal of the dismissal of its claims against BHMI and the judgment in favor of BHMI on its counterclaims, and oral arguments were held before the Nebraska Supreme Court on March 3, 2017. On June 9, 2017, the Nebraska Supreme Court affirmed the District Court judgment. The Company recorded expense of $48.1 million during the nine months ended September 30, 2017, of which $46.7 million is included in general and administrative expense and $1.4 million in interest expense in the accompanying condensed consolidated statement of operations. The Company paid the judgment, including interest, during the three months ended September 30, 2017. Indemnities Under certain customer contracts, the Company indemnifies customers for certain matters including third party claims of intellectual property infringement relating to the use of our products. Our maximum potential exposure under indemnification arrangements can range from a specified dollar amount to an unlimited amount, depending on the nature of the transactions and the agreements. The Company has recorded an accrual for estimated losses for demands for indemnification that have been tendered by certain customers. The Company does not have any reason to believe that we will be required to make any material payments under these indemnity provisions in excess of the balance accrued at September 30, 2017.

Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Accumulated Other Comprehensive Loss

13. Accumulated Other Comprehensive Loss

Activity within accumulated other comprehensive loss for the nine months ended September 30, 2017, which consists of foreign currency translation adjustments, were as follows:


	Accumulated other comprehensive loss
Balance at December 31, 2016	$	(94,100	)
Other comprehensive income		14,526

Balance at September 30, 2017	$	(79,574	)

Balance at December 31, 2015	$	(71,576	)
Other comprehensive loss		(4,887	)

Balance at September 30, 2016	$	(76,463	)

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Receivables, net

Receivables, net


(in thousands)	September 30, 2017			December 31, 2016
Billed Receivables	$	160,622		$	250,116
Allowance for doubtful accounts		(4,157	)		(3,873	)

Billed, net		156,465			246,243
Accrued Receivables		25,804			21,919

Receivables, net	$	182,269		$	268,162

Other Current Assets and Other Current Liabilities

Other Current Assets and Other Current Liabilities


(in thousands)	September 30, 2017		December 31, 2016
Settlement deposits	$	6,392	$	10,496
Settlement receivables		7,239		14,327
Other		11,337		8,755

Total other current assets	$	24,968	$	33,578


(in thousands)	September 30, 2017		December 31, 2016
Settlement payables	$	13,107	$	24,016
Accrued interest		2,469		7,356
Vendor financed licenses		2,092		9,213
Royalties payable		7,073		7,197
Other		28,275		31,059

Total other current liabilities	$	53,016	$	78,841

Off Balance Sheet Accounts

Off Balance Sheet Accounts

Fair Value

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

Goodwill

Changes in the carrying amount of goodwill attributable to each reporting unit with goodwill balances during the nine months ended September 30, 2017 were as follows:


(in thousands)	ACI On Demand		ACI On Premise			Total
Gross Balance prior to December 31, 2016	$	183,783	$	773,340		$	957,123
Total impairment prior to December 31, 2016		—		(47,432	)		(47,432	)

Balance, December 31, 2016		183,783		725,908			909,691
Adjustments		—		—			—

Balance, September 30, 2017	$	183,783	$	725,908		$	909,691

Recently Issued Accounting Standards Not Yet Effective

Recently Issued Accounting Standards Not Yet Effective

Earnings (Loss) per share

Segment Information

- Definition

Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables.

+ References + Details

Condensed Consolidated Financial Statements (Tables)

9 Months Ended

Sep. 30, 2017

Accounting Policies [Abstract]

Receivables and Concentration of Credit Risk


(in thousands)	September 30, 2017			December 31, 2016
Billed Receivables	$	160,622		$	250,116
Allowance for doubtful accounts		(4,157	)		(3,873	)

Billed, net		156,465			246,243
Accrued Receivables		25,804			21,919

Receivables, net	$	182,269		$	268,162

Components of Other Current Assets and Other Current Liabilities

Other Current Assets and Other Current Liabilities


(in thousands)	September 30, 2017		December 31, 2016
Settlement deposits	$	6,392	$	10,496
Settlement receivables		7,239		14,327
Other		11,337		8,755

Total other current assets	$	24,968	$	33,578


(in thousands)	September 30, 2017		December 31, 2016
Settlement payables	$	13,107	$	24,016
Accrued interest		2,469		7,356
Vendor financed licenses		2,092		9,213
Royalties payable		7,073		7,197
Other		28,275		31,059

Total other current liabilities	$	53,016	$	78,841

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill attributable to each reporting unit with goodwill balances during the nine months ended September 30, 2017 were as follows:


(in thousands)	ACI On Demand		ACI On Premise			Total
Gross Balance prior to December 31, 2016	$	183,783	$	773,340		$	957,123
Total impairment prior to December 31, 2016		—		(47,432	)		(47,432	)

Balance, December 31, 2016		183,783		725,908			909,691
Adjustments		—		—			—

Balance, September 30, 2017	$	183,783	$	725,908		$	909,691

Debt (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Maturities on Long-Term Debt Outstanding

Maturities on long-term debt outstanding at September 30, 2017 are as follows:


Fiscal year ending December 31,
(in thousands)
2017	$	5,188
2018		20,750
2019		31,125
2020		331,125
2021		41,500
Thereafter		273,750

Total	$	703,438

Carrying Value of Debt

As of September 30, 2017, and at all times during the period, the Company was in compliance with its debt covenants.


(in thousands)	As of September 30, 2017			As of December 31, 2016
Term Credit Facility	$	399,438		$	365,290
Revolving Credit Facility		4,000			88,000
6.375% Senior Notes, due August 2020		300,000			300,000
Debt issuance costs		(11,272	)		(9,372	)

Total debt		692,166			743,918
Less current portion of Term Credit Facility		20,750			95,293
Less current portion of debt issuance costs		(2,978	)		(4,970	)

Total long-term debt	$	674,394		$	653,595

- 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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-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 4: http://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Stock-Based Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2017

Summary of Stock Options Issued Pursuant to Stock Incentive Plans

A summary of stock options issued pursuant to the Company’s stock incentive plans is as follows:


	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, 2016		6,791,375		$	15.54
Granted		864,800			20.12
Exercised		(756,140	)		13.60
Forfeited		(207,559	)		18.46
Expired		(17,507	)		20.36

Outstanding as of September 30, 2017		6,674,969		$	16.25		6.60	$	43,563,796

Exercisable as of September 30, 2017		3,938,286		$	14.45		5.31	$	32,792,014

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested restricted share awards (“RSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Restricted Share Awards	Number of Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		172,108		$	20.62
Granted		560,174			20.61
Vested		(120,869	)		20.72
Forfeited		(79,665	)		20.47

Nonvested as of September 30, 2017		531,748		$	20.60

Black-Scholes Option-Pricing Model [Member]

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions


	Nine Months Ended September 30, 2017			Nine Months Ended September 30, 2016
Expected life (years)		5.6			5.9
Interest rate		1.9	%		1.2	%
Volatility		29.4	%		29.7	%
Dividend yield		—			—

Monte Carlo Simulation [Member]

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions


	Nine Months Ended September 30, 2016
Expected life (years)		7.5
Interest rate		1.6	%
Volatility		41.6	%
Dividend yield		—

LTIP Performance Shares [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested long-term incentive program performance share awards (“LTIP Performance Shares”) outstanding as of September 30, 2017 and changes during the period are as follows:


Nonvested LTIP Performance Shares	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016		1,738,056		$	18.45
Granted		553,549			20.12
Forfeited		(150,241	)		18.77

Nonvested as of September 30, 2017		2,141,364		$	18.86

Total Shareholder Return [Member] | Monte Carlo Simulation [Member]

Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions

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


	Nine Months Ended September 30, 2017
Expected life (years)		2.9
Interest rate		1.5	%
Volatility		26.5	%
Dividend Yield		—

TSR Plan [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested TSRs outstanding as of September 30, 2017 and changes during the period are as follows:


Nonvested Total Shareholder Return Awards	Number of Shares at Expected Attainment			Weighted- Average Grant Date Fair Value
Nonvested as of December 31, 2016		—		$	—
Granted		233,077			24.37
Forfeited		(8,624	)		24.37

Nonvested as of September 30, 2017		224,453		$	24.37

Performance-Based Restricted Share Awards [Member]

Summary of Nonvested Performance Share Awards and Changes During Period

A summary of nonvested Performance-Based Restricted Share Awards (“PBRSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Performance-Based Restricted Share Awards	Number of Performance-Based Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		683,667		$	23.25
Vested		(484,835	)		22.82
Forfeited		(11,604	)		(23.84	)
Change in attainment for 2015 grants		(13,592	)		23.25

Nonvested as of September 30, 2017		173,636		$	24.41

Retention RSAs [Member]

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested Retention Restricted Share Awards (“Retention RSAs”) as of September 30, 2017 and changes during the period are as follows:


Nonvested Retention Restricted Share Awards	Number of Retention Restricted Share Awards			Weighted-Average Grant Date Fair Value
Nonvested as of December 31, 2016		205,540		$	17.89
Vested		(205,540	)		17.89

Nonvested as of September 30, 2017		—		$	—

Restricted share awards (RSAs) [Member] | PAY.ON [Member]

Summary of Nonvested Restricted Share Awards and Changes During Period

A summary of nonvested PAY.ON RSAs as of September 30, 2017 and changes during the period are as follows:


Nonvested PAY.ON RSAs	Number of PAY.ON RSAs			Grant Date Fair Value
Nonvested at December 31, 2016		238,376		$	23.60
Forfeited		(119,188	)		23.60
Vested		(59,594	)		23.60

Nonvested at September 30, 2017		59,594		$	23.60

Software and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

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 that were subject to amortization at each balance sheet date are as follows:


	September 30, 2017							December 31, 2016
	Gross Carrying Amount		Accumulated Amortization			Net Balance		Gross Carrying Amount		Accumulated Amortization			Net Balance
Customer relationships	$	303,708	$	(111,783	)	$	191,925	$	295,730	$	(96,356	)	$	199,374
Trademarks and tradenames		16,579		(13,406	)		3,173		16,019		(11,759	)		4,260

	$	320,287	$	(125,189	)	$	195,098	$	311,749	$	(108,115	)	$	203,634

Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Software and Other Intangible Assets

Based on capitalized software and other intangible assets at September 30, 2017, estimated amortization expense for future fiscal years is as follows:


Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
(in thousands)
Remainder of 2017	$	14,256	$	4,892
2018		47,196		19,061
2019		39,324		18,505
2020		29,967		17,609
2021		19,542		17,103
2022		8,394		16,942
Thereafter		5,791		100,986

Total	$	164,470	$	195,098

Corporate Restructuring and Other Organizational Changes (Tables)

9 Months Ended

Sep. 30, 2017

Restructuring and Related Activities [Abstract]

Components of Corporate Restructuring and Other Reorganization Activities from Recent Acquisitions

The components of corporate restructuring and other reorganization activities are included in the following table:


(in thousands)	Facility Closures
Balance, December 31, 2016	$	4,559
Restructuring charges incurred		363
Amounts paid during the period		(956	)
Foreign currency translation		199

Balance, September 30, 2017	$	4,165

Earnings (Loss) Per Share (Tables)

9 Months Ended

Sep. 30, 2017

Earnings Per Share [Abstract]

Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Earnings (Loss) Per Share

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Weighted average shares outstanding:
Basic weighted average shares outstanding		118,254		116,118		117,096		117,606
Add: Dilutive effect of stock options		1,489		—		—		1,365

Diluted weighted average shares outstanding		119,743		116,118		117,096		118,971

Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Selected Segment Financial Data, Revenues and Operating Income (Loss)

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


	Three Months Ended September 30,						Nine Months Ended September 30,
	2017			2016			2017			2016
Revenues:
ACI On Premise	$	126,006		$	120,618		$	385,108		$	349,904
ACI On Demand		99,729			96,357			312,688			297,651
Corporate and other		—			—			—			15,416

	$	225,735		$	216,975		$	697,796		$	662,971

Depreciation and amortization expense:
ACI On Premise	$	3,321		$	3,616		$	9,915		$	10,961
ACI On Demand		8,576			7,308			25,973			21,665
Corporate and other		13,656			14,059			40,884			43,212

	$	25,553		$	24,983		$	76,772		$	75,838

Stock-based compensation expense:
ACI On Premise	$	1,869		$	1,770		$	4,984		$	5,222
ACI On Demand		1,865			1,766			4,973			5,209
Corporate and other		4,350			7,258			12,767			23,381

	$	8,084		$	10,794		$	22,724		$	33,812

Operating income (loss):
ACI On Premise	$	59,947		$	47,523		$	181,161		$	120,718
ACI On Demand		(11,683	)		(8,089	)		(39,740	)		(28,653	)
Corporate and other		(36,841	)		(48,787	)		(164,818	)		8,722

	$	11,423		$	(9,353	)	$	(23,397	)	$	100,787

Selected Segment Financial Data, Revenues and Long lived Assets

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Revenues:
United States	$	120,859	$	117,407	$	386,436	$	376,322
Other		104,876		99,568		311,360		286,649

	$	225,735	$	216,975	$	697,796	$	662,971


	September 30,		December 31,
	2017		2016
Long lived assets
United States	$	769,054	$	752,442
Other		617,274		664,383

	$	1,386,328	$	1,416,825

Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2017

Equity [Abstract]

Activity within Accumulated Other Comprehensive Loss

Activity within accumulated other comprehensive loss for the nine months ended September 30, 2017, which consists of foreign currency translation adjustments, were as follows:


	Accumulated other comprehensive loss
Balance at December 31, 2016	$	(94,100	)
Other comprehensive income		14,526

Balance at September 30, 2017	$	(79,574	)

Balance at December 31, 2015	$	(71,576	)
Other comprehensive loss		(4,887	)

Balance at September 30, 2016	$	(76,463	)

Condensed Consolidated Financial Statements - Receivables and Concentration of Credit Risk (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Billed Receivables	$ 160,622	$ 250,116
Allowance for doubtful accounts	(4,157)	(3,873)
Billed, net	156,465	246,243
Accrued Receivables	25,804	21,919
Receivables, net	$ 182,269	$ 268,162

Condensed Consolidated Financial Statements - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Other Current Assets and Liabilities [Line Items]
Other	$ 11,337	$ 8,755
Total other current assets	24,968	33,578
Settlement payables	13,107	24,016
Accrued interest	2,469	7,356
Vendor financed licenses	2,092	9,213
Royalties payable	7,073	7,197
Other	28,275	31,059
Total other current liabilities	53,016	78,841
Settlement deposits [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	6,392	10,496
Settlement receivables [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	$ 7,239	$ 14,327

Condensed Consolidated Financial Statements - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2017
Summary Of Significant Accounting Policies [Line Items]
Amount of off balance sheet settlement funds	$ 270,000,000	$ 223,900,000
Goodwill impairment	0
Level 2 [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair value senior note	$ 309,800,000	$ 305,400,000

Condensed Consolidated Financial Statements - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Goodwill [Line Items]
Gross Balance prior to the end of year		$ 957,123
Total impairment, beginning of period		(47,432)
Beginning Balance	$ 909,691
Adjustments	0
Ending Balance	909,691
ACI On Demand [Member]
Goodwill [Line Items]
Gross Balance prior to the end of year		183,783
Total impairment, beginning of period		0
Beginning Balance	183,783
Adjustments	0
Ending Balance	183,783
ACI On Premise [Member]
Goodwill [Line Items]
Gross Balance prior to the end of year		773,340
Total impairment, beginning of period		$ (47,432)
Beginning Balance	725,908
Adjustments	0
Ending Balance	$ 725,908

Divestiture - Additional information (Detail) - Community Financial Services Products [Member] - Disposal Group, Not Discontinued Operations [Member] - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Mar. 03, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount of consideration related to disposal			$ 200.0
Net after-tax gain on the sale of assets		$ 93.4
Adjustment to Gain Loss on Sale of Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net after-tax gain on the sale of assets	$ 0.5

Debt - Additional Information (Detail) - USD ($)			9 Months Ended
Debt - Additional Information (Detail) - USD ($)	Jun. 27, 2017	Feb. 24, 2017	Sep. 30, 2017	Sep. 30, 2016	Jun. 15, 2017	Oct. 26, 2016	Feb. 29, 2016	Aug. 20, 2013
Debt Instrument [Line Items]
Proceeds from revolving credit facility			$ 42,000,000	$ 52,000,000
Proceeds from term portion of credit agreement			$ 415,000,000	$ 0
Credit facility, interest rate description			The applicable margin for borrowings under the Credit Facility is, based on the calculation of the applicable consolidated total leverage ratio, between 0.25% to 1.25% with respect to base rate borrowings and between 1.25% and 2.25% with respect to LIBOR rate borrowings. Interest is due and payable monthly. The interest rate in effect at September 30, 2017 for the Credit Facility was 2.99%.
Credit facility, interest rate margin above federal fund rate			1.00%
Credit facility, interest rate margin above one-month LIBOR rate			1.00%
Credit facility, borrowing rate			2.99%
Credit Facility maturity date			Feb. 24, 2022
Description of credit agreement amendment terms	The amendment revised the definition of “Consolidated EBITDA” to exclude the expense from the BHMI judgment and related fees, expenses, and interest thereto, up to $50 million from the calculation in the period recorded		The amendment revised the definition of “Consolidated EBITDA” to exclude the expense from the BHMI judgment and related fees, expenses, and interest thereto, up to $50 million from the calculation in the period recorded
Maximum [Member]
Debt Instrument [Line Items]
BHMI judgment and related fees, expenses, and interest excluded from Consolidated EBITDA definition	$ 50,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding			$ 4,000,000
Unused and available borrowings			496,000,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding			399,400,000
Letters of Credit [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity					$ 5,000,000	$ 7,500,000	$ 25,000,000
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes amount outstanding			$ 300,000,000					$ 300,000,000
Issue price percentage of senior notes of the principal amount								100.00%
Percentage of interest rate on notes								6.375%
Maturity date of senior notes			Aug. 15, 2020
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		$ 500,000,000
Credit facilities, maturity		5 years
Proceeds from revolving credit facility		$ 12,000,000
Credit Agreement [Member] \| Term Credit Facility [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity		$ 415,000,000
Credit facilities, maturity		5 years
Proceeds from term portion of credit agreement		$ 415,000,000
Parent Company and Domestic Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			100.00%
Foreign Subsidiaries [Member]
Debt Instrument [Line Items]
Percentage of capital stock pledged as collateral			65.00%

Debt - Maturities on Long-Term Debt Outstanding (Detail) $ in Thousands	Sep. 30, 2017 USD ($)
Debt Disclosure [Abstract]
2017	$ 5,188
2018	20,750
2019	31,125
2020	331,125
2021	41,500
Thereafter	273,750
Total	$ 703,438

Debt - Carrying Value of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt issuance costs	$ (11,272)	$ (9,372)
Total debt	692,166	743,918
Current portion of long-term debt	17,772	90,323
Less current portion of debt issuance costs	(2,978)	(4,970)
Total long-term debt	674,394	653,595
6.375% Senior Notes, due August 2020 [Member]
Debt Instrument [Line Items]
Total debt	300,000	300,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	399,438	365,290
Current portion of long-term debt	20,750	95,293
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	$ 4,000	$ 88,000

Debt - Carrying Value of Debt (Parenthetical) (Detail) - 6.375% Senior Notes, due August 2020 [Member]	9 Months Ended
	Sep. 30, 2017
Debt Instrument [Line Items]
Percentage of interest rate on notes	6.375%
Maturity date of senior notes	Aug. 15, 2020

Stock-Based Compensation Plans - Additional Information (Detail)		3 Months Ended		9 Months Ended
	Dec. 31, 2016	Sep. 30, 2017 USD ($) shares	Sep. 30, 2016 USD ($) Tranche $ / shares	Sep. 30, 2017 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) Tranche $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP \| shares				121,765	141,484
Incentive plan, weighted-average grant date fair value of stock options granted \| $ / shares				$ 6.24	$ 5.59
Incentive plan, total intrinsic value of stock options exercised				$ 6,600,000	$ 6,700,000
Expected dividend yield				0.00%
Dividend paid \| $ / shares				$ 0
Number of tranches \| Tranche			3		3
Stock-based compensation expenses		$ 8,084,000	$ 10,794,000	$ 22,724,000	$ 33,812,000
Stock-based compensation expenses tax benefits		$ 2,700,000	$ 4,100,000	$ 7,700,000	$ 12,700,000
Employee Stock Purchase Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance \| shares		3,000,000		3,000,000
Permitted designation for purchase of common stock under ESPP				Participating employees are permitted to designate up to the lesser of $25,000 or 10% of their annual base compensation for the purchase of common stock under the ESPP. Purchases under the ESPP are made one calendar month after the end of each fiscal quarter.
Employee participating annual base compensation designated for purchase of common stock, amount		$ 25,000		$ 25,000
Employee participating annual base compensation designated for purchase of common stock, percent		10.00%		10.00%
Price of common stock purchased under ESPP, percent				85.00%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		$ 10,400,000		$ 10,400,000
Unrecognized compensation costs, weighted-average recognition periods				1 year 7 months 6 days
Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, non-vested grant date fair value \| $ / shares			$ 7.46		$ 7.46
Share-based compensation, trading price percentage					133.00%
Consecutive trading days					20 days
Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, non-vested grant date fair value \| $ / shares			7.06		$ 7.06
Share-based compensation, trading price percentage					167.00%
Consecutive trading days					20 days
Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, non-vested grant date fair value \| $ / shares			$ 6.50		$ 6.50
Share-based compensation, trading price percentage					200.00%
Consecutive trading days					20 days
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation awards, award payout range, minimum				0.00%
Stock based compensation awards, award payout range, maximum		200.00%		200.00%
Unrecognized compensation costs		$ 4,400,000		$ 4,400,000
Unrecognized compensation costs, weighted-average recognition periods				2 years 4 months 24 days
LTIP Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs		18,000,000		$ 18,000,000
Unrecognized compensation costs, weighted-average recognition periods				1 year 10 months 25 days
Restricted share awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation awards, shares vested \| shares				120,869
Shares withheld to pay employees' portion of minimum payroll withholding taxes \| shares				3,311
Unrecognized compensation costs		8,600,000		$ 8,600,000
Unrecognized compensation costs, weighted-average recognition periods				2 years 1 month 6 days
Performance-Based Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation awards, shares vested \| shares				484,835
Shares withheld to pay employees' portion of minimum payroll withholding taxes \| shares				178,351
Award grants assuming percentage	100.00%
Unrecognized compensation costs		$ 1,000,000		$ 1,000,000
Unrecognized compensation costs, weighted-average recognition periods				8 months 12 days
Performance-Based Restricted Share Awards [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				100.00%
Performance-Based Restricted Share Awards [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected attainment level for the awards granted, percentage				98.00%
Retention RSAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock based compensation awards, shares vested \| shares				205,540
Shares withheld to pay employees' portion of minimum payroll withholding taxes \| shares				75,198

Stock-Based Compensation Plans - Summary of Stock Options Issued Pursuant to Stock Incentive Plans (Detail)	9 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Number of Shares
Outstanding, Beginning Balance \| shares	6,791,375
Granted \| shares	864,800
Exercised \| shares	(756,140)
Forfeited \| shares	(207,559)
Expired \| shares	(17,507)
Outstanding, Ending Balance \| shares	6,674,969
Number of Shares Exercisable, Ending Balance \| shares	3,938,286
Weighted-Average Exercise Price
Beginning Balance \| $ / shares	$ 15.54
Granted \| $ / shares	20.12
Exercised \| $ / shares	13.60
Forfeited \| $ / shares	18.46
Expired \| $ / shares	20.36
Ending Balance \| $ / shares	16.25
Weighted-Average Exercise Price Exercisable, Ending Balance \| $ / shares	$ 14.45
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	6 years 7 months 6 days
Weighted-Average Remaining Contractual Term (Years), Exercisable as of end of period	5 years 3 months 22 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period \| $	$ 43,563,796
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period \| $	$ 32,792,014

Stock-Based Compensation Plans - Estimated Fair Value of Options Granted using Black-Scholes Option-Pricing Model with Weighted-Average Assumptions (Detail)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%
Black-Scholes Option-Pricing Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	5 years 7 months 6 days	5 years 10 months 25 days
Interest rate	1.90%	1.20%
Volatility	29.40%	29.70%
Dividend yield	0.00%	0.00%

Stock-Based Compensation Plans - Estimated Fair Value of Options Granted using Monte Carlo Simulation Model with Weighted-Average Assumptions (Detail)	9 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%
Monte Carlo Simulation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	7 years 6 months
Interest rate	1.60%
Volatility	41.60%
Dividend yield	0.00%

Stock-Based Compensation Plans - Summary of Nonvested LTIP Performance Based Share Awards and Changes During Period (Detail) - LTIP Performance Shares [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Number of shares at expected attainment
Beginning Balance \| shares	1,738,056
Granted \| shares	553,549
Forfeited \| shares	(150,241)
Ending Balance \| shares	2,141,364
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 18.45
Granted \| $ / shares	20.12
Forfeited \| $ / shares	18.77
Ending Balance \| $ / shares	$ 18.86

Stock-Based Compensation Plans - Summary of Nonvested Restricted Share Awards and Changes During Period (Detail) - Restricted share awards (RSAs) [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Nonvested Restricted Share Awards
Beginning Balance \| shares	172,108
Granted \| shares	560,174
Vested \| shares	(120,869)
Forfeited \| shares	(79,665)
Ending Balance \| shares	531,748
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 20.62
Granted \| $ / shares	20.61
Vested \| $ / shares	20.72
Forfeited \| $ / shares	20.47
Ending Balance \| $ / shares	$ 20.60

Stock-Based Compensation Plans - Summary of Nonvested Performance Based Share Awards and Changes During Period (Detail) - Performance-Based Restricted Share Awards [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Nonvested Restricted Share Awards
Beginning Balance \| shares	683,667
Vested \| shares	(484,835)
Forfeited \| shares	(11,604)
Change in attainment for 2015 grants \| shares	(13,592)
Ending Balance \| shares	173,636
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 23.25
Vested \| $ / shares	22.82
Forfeited \| $ / shares	(23.84)
Change in attainment for 2015 grants \| $ / shares	23.25
Ending Balance \| $ / shares	$ 24.41

Stock-Based Compensation Plans - Summary of Nonvested Retention Restricted Share Awards and Changes During Period (Detail)	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Retention RSAs [Member]
Nonvested Restricted Share Awards
Beginning Balance \| shares	205,540
Vested \| shares	(205,540)
Ending Balance \| shares	0
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 17.89
Vested \| $ / shares	17.89
Ending Balance \| $ / shares	$ 0
PAY.ON RSAs [Member]
Nonvested Restricted Share Awards
Beginning Balance \| shares	238,376
Forfeited \| shares	(119,188)
Vested \| shares	(59,594)
Ending Balance \| shares	59,594
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 23.60
Forfeited \| $ / shares	23.60
Vested \| $ / shares	23.60
Ending Balance \| $ / shares	$ 23.60

Stock-Based Compensation Plans - Estimated Fair Value of Options Granted Total Shareholder Return (TSRs) using Monte Carlo Simulation Model with Weighted-Average Assumptions (Detail)	9 Months Ended
	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	0.00%
Monte Carlo Simulation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	7 years 6 months
Interest rate	1.60%
Volatility	41.60%
Dividend yield	0.00%
Total Shareholder Return [Member] \| Monte Carlo Simulation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	2 years 10 months 25 days
Interest rate	1.50%
Volatility	26.50%
Dividend yield	0.00%

Stock-Based Compensation Plans - Summary of Nonvested Total Shareholder Return (TSRs) Outstanding and Changes During Period (Detail) - Total Shareholder Return [Member]	9 Months Ended
	Sep. 30, 2017 $ / shares shares
Number of shares at expected attainment
Beginning Balance \| shares	0
Granted \| shares	233,077
Forfeited \| shares	(8,624)
Ending Balance \| shares	224,453
Weighted-Average Grant Date Fair Value
Beginning Balance \| $ / shares	$ 0
Granted \| $ / shares	24.37
Forfeited \| $ / shares	24.37
Ending Balance \| $ / shares	$ 24.37

Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 164,470		$ 164,470		$ 185,496
Software, accumulated amortization	221,000		221,000		195,000
Other intangible assets amortization expense	4,900	$ 5,300	14,500	$ 16,400
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	44,100		44,100		52,300
Software, amortization expense	3,100	2,900	$ 9,600	9,200
Software Marketed for External Sale [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Software Marketed for External Sale [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years
Software Acquired or Developed for Internal Use [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	120,400		$ 120,400		$ 133,200
Software, amortization expense	$ 11,500	$ 11,300	$ 34,100	$ 34,200
Software Acquired or Developed for Internal Use [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			3 years
Software Acquired or Developed for Internal Use [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life			10 years

Software and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 320,287	$ 311,749
Accumulated Amortization	(125,189)	(108,115)
Net Balance	195,098	203,634
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	303,708	295,730
Accumulated Amortization	(111,783)	(96,356)
Net Balance	191,925	199,374
Trademarks and tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,579	16,019
Accumulated Amortization	(13,406)	(11,759)
Net Balance	$ 3,173	$ 4,260

Software and Other Intangible Assets - Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Net Balance	$ 195,098	$ 203,634
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	14,256
2018	47,196
2019	39,324
2020	29,967
2021	19,542
2022	8,394
Thereafter	5,791
Net Balance	164,470
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2017	4,892
2018	19,061
2019	18,505
2020	17,609
2021	17,103
2022	16,942
Thereafter	100,986
Net Balance	$ 195,098

Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
Lease termination fee	$ 400
Facility Closures [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4,165	$ 4,559
Facility Closures [Member] \| Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,200
Facility Closures [Member] \| Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,000

Corporate Restructuring and Other Organizational Changes - Components of Corporate Restructuring and Other Reorganization Activities from Recent Acquisitions (Detail) - Facility Closures [Member] $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 4,559
Restructuring charges incurred	363
Amounts paid during the period	(956)
Foreign currency translation	199
Ending balance	$ 4,165

Common Stock and Treasury Stock - Additional Information (Detail) - USD ($)	9 Months Ended	61 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Feb. 28, 2014	Jul. 31, 2013	Sep. 13, 2012	Sep. 12, 2012
Maximum stock authorized to purchase under stock repurchase program			$ 200,000,000			$ 262,100,000
Increase in maximum stock authorized to purchase under stock repurchase program			$ 100,000,000	$ 100,000,000
Repurchase of common stock, shares	0	40,129,393
Repurchase of common stock, value		$ 455,900,000
Maximum [Member]
Maximum stock authorized to purchase under stock repurchase program					$ 113,000,000
Stock authorized to purchase under stock repurchase program, shares					7,500,000
Remaining value of shares authorized for purchase under the stock repurchase program	$ 78,200,000	$ 78,200,000

Earnings (Loss) Per Share - Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Earnings (Loss) Per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Weighted average shares outstanding:
Basic weighted average shares outstanding	118,254	116,118	117,096	117,606
Add: Dilutive effect of stock options	1,489	0	0	1,365
Diluted weighted average shares outstanding	119,743	116,118	117,096	118,971

Earnings (Loss) Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Earnings Per Share [Abstract]
Options to purchase shares, restricted share awards, and contingently issuable shares excluded from diluted net earnings (loss) per share computation	3,300,000	9,900,000	10,100,000	6,100,000
Common stock outstanding	118,293,967		118,293,967		117,336,797

Other - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Other Income and Expenses [Abstract]
Foreign currency transaction gains (losses)	$ (1.1)	$ 2.8	$ (2.2)	$ 4.5

Segment Information - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 225,735		$ 216,975	$ 697,796	$ 662,971
Operating income	$ 11,423		$ (9,353)	(23,397)	100,787
BHMI judgment and related fees and interest expense		$ 2,700		48,100
General and Administrative Expense [Member]
Segment Reporting Information [Line Items]
BHMI judgment and related fees and interest expense				$ 46,700
Geographic Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenues during the three and nine months ended September 30, 2017 and 2016	No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and nine months ended September 30, 2017 and 2016.			No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the three and nine months ended September 30, 2017 and 2016.
Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Percentage of revenues during the three and nine months ended September 30, 2017 and 2016	No single customer accounted for more than 10% of the Company's consolidated revenues during the three and nine months ended September 30, 2017 and 2016.			No single customer accounted for more than 10% of the Company's consolidated revenues during the three and nine months ended September 30, 2017 and 2016.
Corporate and Other [Member] \| Community Financial Services Products [Member]
Segment Reporting Information [Line Items]
Revenues					15,400
Operating income					$ 151,700

Selected Segment Financial Data, Revenues and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Revenues	$ 225,735	$ 216,975	$ 697,796	$ 662,971
Depreciation and amortization expense	25,553	24,983	76,772	75,838
Stock-based compensation expense	8,084	10,794	22,724	33,812
Operating income (loss)	11,423	(9,353)	(23,397)	100,787
Operating Segments [Member] \| ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues	126,006	120,618	385,108	349,904
Depreciation and amortization expense	3,321	3,616	9,915	10,961
Stock-based compensation expense	1,869	1,770	4,984	5,222
Operating income (loss)	59,947	47,523	181,161	120,718
Operating Segments [Member] \| ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues	99,729	96,357	312,688	297,651
Depreciation and amortization expense	8,576	7,308	25,973	21,665
Stock-based compensation expense	1,865	1,766	4,973	5,209
Operating income (loss)	(11,683)	(8,089)	(39,740)	(28,653)
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	15,416
Depreciation and amortization expense	13,656	14,059	40,884	43,212
Stock-based compensation expense	4,350	7,258	12,767	23,381
Operating income (loss)	$ (36,841)	$ (48,787)	$ (164,818)	$ 8,722

Selected Segment Financial Data, Revenues and Long lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues
Revenues	$ 225,735	$ 216,975	$ 697,796	$ 662,971
Long lived assets
Long lived assets	1,386,328		1,386,328		$ 1,416,825
United States [Member]
Revenues
Revenues	120,859	117,407	386,436	376,322
Long lived assets
Long lived assets	769,054		769,054		752,442
Other [Member]
Revenues
Revenues	104,876	$ 99,568	311,360	$ 286,649
Long lived assets
Long lived assets	$ 617,274		$ 617,274		$ 664,383

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Earnings of foreign entities	$ 15.2	$ 16.4	$ 40.6	$ 44.0
Effective tax rate, percentage	(193.00%)	40.00%	49.00%	17.00%
Increase (decrease) in valuation allowance of deferred tax assets		$ 4.7		$ (5.4)
Unrecognized tax benefit for uncertain tax positions	$ 25.6		$ 25.6		$ 24.3
Accrued interest and penalties related to income tax liabilities	1.5		1.5		$ 1.9
Decrease in unrecognized tax benefits due to expiration of statutes of limitations and settlement of various audits	$ 1.4		$ 1.4

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Sep. 23, 2015	Mar. 31, 2017	Sep. 30, 2017
Commitments and Contingencies [Line Items]
Loss Contingency, name of plaintiff		Baldwin Hackett & Meeks, Inc.
Loss contingency, damages sought, value	$ 43.8
Loss contingency, damages awarded, value		$ 43.8
BHMI judgment and related fees and interest expense		$ 2.7	$ 48.1
General and Administrative Expense [Member]
Commitments and Contingencies [Line Items]
BHMI judgment and related fees and interest expense			46.7
Interest Expense [Member]
Commitments and Contingencies [Line Items]
BHMI judgment and related fees and interest expense			$ 1.4

Accumulated Other Comprehensive Loss - Activity within Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 754,917
Other comprehensive income (loss)	$ (594)	$ (2,228)	14,526	$ (4,887)
Ending balance	771,309		771,309
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(94,100)	(71,576)
Ending balance	$ (79,574)	$ (76,463)	$ (79,574)	$ (76,463)