ACI Worldwide (ACIW) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 05, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Trading Symbol	ACIW
Entity Registrant Name	ACI WORLDWIDE, INC.
Entity Central Index Key	935,036
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		115,979,645
Entity Emerging Growth Company	false
Entity Small Business	false

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 76,342	$ 69,710
Receivables, net of allowances of $3,598 and $4,799, respectively	279,641	262,845
Recoverable income taxes	8,233	7,921
Prepaid expenses	25,875	23,219
Other current assets	23,244	58,126
Total current assets	413,335	421,821
Noncurrent assets
Accrued receivables, net	181,832
Property and equipment, net	75,437	80,228
Software, net	147,316	155,386
Goodwill	909,691	909,691
Intangible assets, net	174,057	191,281
Deferred income taxes, net	28,179	66,749
Other noncurrent assets	54,477	36,483
TOTAL ASSETS	1,984,324	1,861,639
Current liabilities
Accounts payable	27,381	34,718
Employee compensation	48,142	48,933
Current portion of long-term debt	18,765	17,786
Deferred revenue	93,668	107,543
Income taxes payable	1,600	9,898
Other current liabilities	60,075	102,904
Total current liabilities	249,631	321,782
Noncurrent liabilities
Deferred revenue	48,789	51,967
Long-term debt	656,159	667,943
Deferred income taxes, net	26,372	16,910
Other noncurrent liabilities	40,435	38,440
Total liabilities	1,021,386	1,097,042
Commitments and contingencies
Stockholders' equity
Preferred stock; $0.01 par value; 5,000,000 shares authorized; no shares issued at September 30, 2018 and December 31, 2017
Common stock; $0.005 par value; 280,000,000 shares authorized; 140,525,055 shares issued at September 30, 2018 and December 31, 2017	702	702
Additional paid-in capital	632,547	610,345
Retained earnings	776,078	550,866
Treasury stock, at cost, 24,543,359 and 23,428,324 shares at September 30, 2018 and December 31, 2017, respectively	(357,923)	(319,960)
Accumulated other comprehensive loss	(88,466)	(77,356)
Total stockholders' equity	962,938	764,597
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,984,324	$ 1,861,639

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Receivables, allowances	$ 3,598	$ 4,799
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.005	$ 0.005
Common stock, shares authorized	280,000,000	280,000,000
Common stock, shares issued	140,525,055	140,525,055
Treasury stock, shares	24,543,359	23,428,324

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Total revenues		$ 245,525	$ 225,735	$ 689,830	$ 697,796
Operating expenses
Cost of revenue	[1]	102,473	107,393	326,070	336,293
Research and development		36,008	33,935	110,661	106,189
Selling and marketing		28,252	25,236	93,305	81,190
General and administrative		29,537	25,302	87,023	130,332
Depreciation and amortization		20,896	22,446	63,274	67,189
Total operating expenses		217,166	214,312	680,333	721,193
Operating income (loss)		28,359	11,423	9,497	(23,397)
Other income (expense)
Interest expense		(12,573)	(9,374)	(31,655)	(30,198)
Interest income		2,763	165	8,249	421
Other, net		(1,304)	(1,059)	(3,036)	(2,176)
Total other income (expense)		(11,114)	(10,268)	(26,442)	(31,953)
Income (loss) before income taxes		17,245	1,155	(16,945)	(55,350)
Income tax expense (benefit)		2,012	(2,233)	1,824	(27,321)
Net income (loss)		$ 15,233	$ 3,388	$ (18,769)	$ (28,029)
Earnings (loss) per common share
Basic		$ 0.13	$ 0.03	$ (0.16)	$ (0.24)
Diluted		$ 0.13	$ 0.03	$ (0.16)	$ (0.24)
Weighted average common shares outstanding
Basic		115,889	118,254	115,615	117,096
Diluted		117,492	119,743	115,615	117,096
Software as a service and platform as a service [Member]
Revenues
Total revenues		$ 104,519	$ 99,761	$ 322,399	$ 312,677
License [Member]
Revenues
Total revenues		68,964	50,017	142,565	163,578
Maintenance [Member]
Revenues
Total revenues		54,373	56,349	166,080	166,829
Services [Member]
Revenues
Total revenues		$ 17,669	$ 19,608	$ 58,786	$ 54,712
[1]	The cost of revenue excludes charges for depreciation but includes amortization of purchased and developed software for resale.

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 15,233	$ 3,388	$ (18,769)	$ (28,029)
Other comprehensive income (loss):
Foreign currency translation adjustments	(3,862)	(594)	(11,110)	14,526
Total other comprehensive income (loss)	(3,862)	(594)	(11,110)	14,526
Comprehensive income (loss)	$ 11,371	$ 2,794	$ (29,879)	$ (13,503)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (18,769)	$ (28,029)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation	17,896	18,658
Amortization	54,993	58,114
Amortization of deferred debt issuance costs	3,881	3,537
Deferred income taxes	(7,139)	(37,707)
Stock-based compensation expense	20,642	22,724
Other	1,432	1,094
Changes in operating assets and liabilities
Receivables	58,443	80,398
Accounts payable	(4,217)	(11,610)
Accrued employee compensation	92	(1,056)
Current income taxes	(10,429)	(10,161)
Deferred revenue	(47)	(1,248)
Other current and noncurrent assets and liabilities	(16,316)	(9,642)
Net cash flows from operating activities	100,462	85,072
Cash flows from investing activities:
Purchases of property and equipment	(16,434)	(18,566)
Purchases of software and distribution rights	(21,876)	(21,328)
Other	(1,467)
Net cash flows from investing activities	(39,777)	(39,894)
Cash flows from financing activities:
Proceeds from issuance of common stock	2,326	2,185
Proceeds from exercises of stock options	18,405	10,284
Repurchase of restricted stock for tax withholdings	(2,588)	(5,311)
Repurchases of common stock	(54,527)
Proceeds from senior notes	400,000
Redemption of senior notes	(300,000)
Proceeds from revolving credit facility	109,000	42,000
Repayment of revolving credit facility	(111,000)	(126,000)
Proceeds from term portion of credit agreement		415,000
Repayment of term portion of credit agreement	(105,332)	(380,852)
Payment of debt issuance costs	(7,253)	(5,340)
Payments on other debt and capital leases	(2,332)	(9,286)
Net cash flows from financing activities	(53,301)	(57,320)
Effect of exchange rate fluctuations on cash	(752)	4,319
Net increase (decrease) in cash and cash equivalents	6,632	(7,823)
Cash and cash equivalents, beginning of period	69,710	75,753
Cash and cash equivalents, end of period	76,342	67,930
Supplemental cash flow information
Income taxes paid	22,439	24,693
Interest paid	$ 31,914	$ 31,762

Condensed Consolidated Financia

Condensed Consolidated Financial Statements	9 Months Ended
	Sep. 30, 2018
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 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 The preparation of condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make judgments, estimates, and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Other Current Assets and Other Current Liabilities (in thousands) September 30, December 31, Settlement deposits $ 5,477 $ 22,282 Settlement receivables 11,462 30,063 Other 6,305 5,781 Total other current assets $ 23,244 $ 58,126 (in thousands) September 30, December 31, Settlement payables $ 16,221 $ 48,953 Accrued interest 2,726 7,291 Vendor financed licenses 5,973 1,862 Royalties payable 7,148 9,264 Other 28,007 35,534 Total other current liabilities $ 60,075 $ 102,904 Individuals and businesses settle their obligations to the Company’s various clients, primarily utility and other public sector clients, using credit or debit cards or via ACH payments. The Company creates a receivable for the amount due from the credit or debit card company and an offsetting payable to the client. Upon confirmation that the funds have been received, the Company settles the obligation to the client. Due to timing, in some instances, the Company may receive the funds into bank accounts controlled by and in the Company’s name that are not disbursed to its clients by the end of the day resulting in a settlement deposit on the Company’s books. Off Balance Sheet Accounts The Company also enters into agreements with certain clients to process payment funds on their behalf. When an ACH or automated teller machine network payment transaction is processed, a transaction is initiated to withdraw funds from the designated source account and deposit them into a settlement account, which is a trust account maintained for the benefit of the Company’s clients. A simultaneous transaction is initiated to transfer funds from the settlement account to the intended destination account. These “back to back” transactions are designed to settle at the same time, usually overnight, such that the Company receives the funds from the source at the same time as it sends the funds to their destination. However, due to the transactions being with various financial institutions there may be timing differences that result in float balances. These funds are maintained in accounts for the benefit of the client which is separate from the Company’s corporate assets. As the Company does not take ownership of the funds, the settlement accounts are not included in the Company’s balance sheet. The Company is entitled to interest earned on the fund balances. The collection of interest on these settlement accounts is considered in the Company’s determination of its fee structure for clients and represents a portion of the payment for services performed by the Company. The amount of settlement funds as of September 30, 2018 and December 31, 2017 were $185.4 million and $238.9 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 2026 Senior Notes was $407.1 million at September 30, 2018. The fair value of the Company’s 2020 Senior Notes was $305.7 million at December 31, 2017. The fair values of cash and cash equivalents approximate the carrying values due to the short period of time to maturity (Level 2 of the fair value hierarchy). Goodwill In accordance with ASC 350, Intangibles – Goodwill and Other, Recoverability of goodwill is measured using a discounted cash flow model incorporating discount rates commensurate with the risks involved. Use of a discounted cash flow model is common practice in impairment testing in the absence of available transactional market evidence to determine the fair value. The calculated fair value was substantially in excess of the current carrying value for all reporting units based upon the October 1, 2017 annual impairment test and there have been no indications of impairment in the subsequent periods. New Accounting Standards Recently Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers 340-40, Other Assets and Deferred Costs – Contracts with Customers 340-40”). Revenue Recognition 340-40 In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments 2016-15 2016-15 In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other than Inventory 2016-16, 2016-16 2016-16 In August 2018, the FASB issued ASU 2018-05, Intangibles—Goodwill and Other–Internal-Use 2018-05”). 2018-05 350-40, Intangibles – Goodwill and Other — Internal-Use 350-40”), 2018-05 Recently Issued Accounting Standards Not Yet Effective In February 2016, the FASB issued ASU 2016-02, Leases The Company has established a cross-functional project team to assess implementing changes to its systems, processes, and controls, in conjunction with a comprehensive review of existing lease agreements. The Company expects the adoption of ASC 842 will have a material impact on its condensed consolidated balance sheet as its rights and obligations from its existing operating leases will be recognized on the balance sheet as assets and liabilities. As of September 30, 2018, the Company’s undiscounted minimum commitments under noncancelable operating leases was approximately $79.4 million. The Company does not expect the adoption of ASC 842 to have a material impact on its results of operations or statement of cash flows. In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. of ASU 2018-02

Revenue

Revenue	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue	2. Revenue Revenue Recognition In accordance with ASC 606 revenue is recognized upon transfer of control of promised products and/or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products and services. Revenue is recognized net of any taxes collected from customers and subsequently remitted to governmental authorities. Contract Combination. Software as a Service (“SaaS”) and Platform as a Service (“PaaS”) Arrangements License Arrangements. Payment terms for the Company’s software license arrangements generally include fixed license and capacity fees that are payable up front or over time. These arrangements may also include incremental usage-based fees that are payable when the customer exceeds its contracted license capacity limits. The Company accounts for capacity overages as a usage-based royalty that is recognized when the usage occurs. When a software license arrangement contains payment terms that are extended beyond one year, a significant financing component may exist. The significant financing component is calculated as the difference between the stated value and present value of the software license fees and is recognized as interest income over the extended payment period. The total fixed software license fee net of the significant financing component is recognized as revenue at the point in time when the software is transferred to the customer. For those software license arrangements that include customer-specific acceptance provisions, such provisions are generally presumed to be substantive and the Company does not recognize revenue until the earlier of the receipt of a written customer acceptance, objective demonstration that the delivered product meets the customer-specific acceptance criteria, or the expiration of the acceptance period. The Company recognizes revenues on such arrangements upon the earlier of receipt of written acceptance or the first production use of the software by the customer. For software license arrangements in which the Company acts as a distributor of another company’s product, and in certain circumstances, modifies or enhances the product, revenues are recorded on a gross basis. These include arrangements in which the Company takes control of the products and is responsible for providing the product or service. For software license arrangements in which the Company acts as a sales agent for another company’s product, revenues are recorded on a net basis. These include arrangements in which the Company does not take control of products and is not responsible for providing the product or service. For software license arrangements in which the Company utilizes a third-party distributor or sales agent, the Company recognizes revenue upon transfer of control of the software license(s) to the third-party distributor or sales agent. The Company’s software license arrangements typically provide the customer with a standard 90-day Software license arrangements typically include an initial post contract customer support (maintenance or “PCS”) term of one year with subsequent renewals for additional years within the initial license period. The Company’s promise to those customers who elect to purchase PCS represents a stand-ready performance obligation that is distinct from the license performance obligation and recognized over the PCS term. The Company also provides various professional services to customers with software licenses. These include project management, software implementation, and software modification services. Revenues from arrangements to provide professional services are generally distinct from the other promises in the contract(s) and are recognized as the related services are performed. Consideration payable under these arrangements is either fixed fee or on a time-and-materials The Company estimates the standalone selling price (“SSP”) for maintenance and professional services based on observable standalone sales. The Company applies the residual approach to estimate the SSP for software licenses. Refer to Note 10, Segment Information, Significant Judgments The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information. The Company also applies judgment in determining the term of an arrangement when early termination rights are provided to the customer. The Company’s software license arrangements with its customers often include multiple promises to transfer licensed software products and services. Determining whether the products and/or services are distinct performance obligations that should be accounted for separately may require significant judgment. The Company’s SaaS and PaaS arrangements may include variable consideration in the form of usage-based fees. If the arrangement that includes variable consideration in the form of usage-based fees does not meet the allocation exception for variable consideration, the Company estimates the amount of variable consideration at the outset of the arrangement using either the expected value or most likely amount method, depending on the specifics of each arrangement. These estimates are constrained to the extent that it is probable that a significant reversal of incremental revenue will not occur and are updated each reporting period as additional information becomes available. Judgment is used in determining: (1) whether the financing component in a software license agreement is significant and, if so, (2) the discount rate used in calculating the significant financing component. The Company assesses the significance of the financing component based on the ratio of license fees paid over time to total license fees. If determined to be significant, the financing component is calculated using a rate that discounts the license fees to the cash selling price. Judgment is also used in assessing whether the extension of payment terms in a software license arrangement results in variable consideration and, if so, the amount to be included in the transaction price. The Company applies the portfolio approach to estimating the amount of variable consideration in these arrangements using the most likely amount method that is based on the Company’s historical collection experience under similar arrangements. Significant judgment is required to determine the SSP for each performance obligation, the amount allocated to each performance obligation and whether it depicts the amount that the Company expects to receive in exchange for the related product and/or service. As the selling prices of the Company’s software licenses are highly variable, the Company estimates SSP of its software licenses using the residual approach when the software license is sold with other services and observable SSPs exist for the other services. The Company uses a range of amounts to estimate SSP for maintenance and services. These ranges are based on standalone sales and vary based on the type of service and geographic region. If the SSP of a performance obligation is not directly observable, the Company will maximize observable inputs to determine its SSP. Contract Balances Timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an accrued receivable when revenue is recognized prior to invoicing and the Company’s right to consideration only requires the passage of time, or deferred revenue when revenue is recognized subsequent to invoicing. Total receivables represent amounts billed and amounts earned that are to be billed in the future (i.e., accrued receivables). Included in accrued receivables are services and SaaS and PaaS revenues earned in the current period but billed in the following period and amounts due under multi-year software license arrangements with extended payment terms for which the Company has an unconditional right to invoice and receive payment in the future. September 30, December 31, (in thousands) 2018 2017 Billed Receivables $ 172,395 $ 240,137 Allowance for doubtful accounts (3,598 ) (4,799 ) Billed Receivables, net $ 168,797 $ 235,338 Accrued receivables 324,019 27,507 Significant financing component (31,343 ) — Total accrued receivables, net 292,676 27,507 Less current accrued receivables 120,532 27,507 Less current significant financing component (9,688 ) — Total long-term accrued receivables, net $ 181,832 $ — Total receivables, net $ 461,473 $ 262,845 No customer accounted for more than 10% of the Company’s consolidated receivables balance as of September 30, 2018 or December 31, 2017. Deferred revenue includes amounts due or received from customers for software licenses, maintenance, services, and/or SaaS and PaaS services in advance of recording the related revenue. Changes in deferred revenue were as follows: Deferred (in thousands) Revenue Balance, January 1, 2018 $ 145,344 Deferral of revenue 145,573 Recognition of deferred revenue (144,935 ) Foreign currency translation (3,525 ) Balance, September 30, 2018 $ 142,457 Revenue allocated to remaining performance obligations represents contracted revenue that will be recognized in future periods, which is comprised of deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. This does not include: (1) Revenue that will be recognized in future periods from capacity overages that are accounted for as a usage-based royalty. (2) SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the ‘right to invoice’ practical expedient. (3) SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the direct allocation method. Revenue allocated to remaining performance obligations was $599.9 million as of September 30, 2018, of which the Company expects to recognize approximately 48% over the next 12 months and the remainder thereafter. During the three and nine-month periods ended September 30, 2018, the revenue recognized by the Company from performance obligations satisfied in previous periods was not material. Costs to Obtain and Fulfill a Contract The Company accounts for costs to obtain and fulfill its contracts in accordance with ASC 340, Other Assets and Deferred Costs The Company capitalizes certain of its sales commissions that meet the definition of incremental costs of obtaining a contract and for which the amortization period is greater than one year. The costs associated with those sales commissions is capitalized during the period in which the Company becomes obligated to pay the commissions and is amortized over the period in which the related products or services are transferred to the customer. As of September 30, 2018, $0.6 million and $15.4 million of these costs are included in other current and other non-current The Company capitalizes costs incurred to fulfill its contracts that: (1) relate directly to the arrangement, (2) are expected to generate resources that will be used to satisfy the Company’s performance obligation under the arrangement, and (3) are expected to be recovered through revenue generated under the arrangement. Contract fulfillment costs are expensed as the Company transfers the related services to the customer. As of September 30, 2018, $0.1 million and $12.6 million of these costs are included in other current and other non-current Financial Statement Effect of Applying ASC 606 As the modified retrospective transition method does not result in recast of the prior year financial statements, ASC 606 requires the Company to provide additional disclosures for the amount by which each financial statement line item is affected by adoption of the standard and explanation of the reasons for significant changes. The financial statement line items affected by adoption of ASC 606 are as follows: September 30, 2018 (in thousands) As Reported Without Effect of Change Higher / (Lower) Assets Receivables, net of allowances $ 279,641 $ 202,829 $ 76,812 Recoverable income taxes 8,233 6,711 1,522 Prepaid expenses 25,875 26,616 (741 ) Other current assets 23,244 22,844 400 Accrued receivables, net 181,832 — 181,832 Deferred income taxes, net 28,179 67,261 (39,082 ) Other noncurrent assets 54,477 40,275 14,202 Liabilities Deferred revenue 93,668 108,162 (14,494 ) Income taxes payable 1,600 153 1,447 Other current liabilities 60,075 60,310 (235 ) Deferred income taxes, net 26,372 6,161 20,211 Stockholders’ equity Total stockholders’ equity 962,938 734,925 228,013 For the Three Months Ended September 30, 2018 (in thousands) As Reported Without application of ASC 606 Effect of Change Higher / (Lower) Revenues Software as a service and platform as a service $ 104,519 $ 103,764 $ 755 License 68,964 69,052 (88 ) Maintenance 54,373 54,659 (286 ) Services 17,669 18,184 (515 ) Operating expenses Selling and marketing 28,252 26,397 1,855 Other income (expense) Interest income 2,763 230 2,533 Other, net (1,304 ) (1,155 ) (149 ) Income tax provision Income tax expense (benefit) 2,012 2,804 (792 ) For the Nine Months Ended September 30, 2018 (in thousands) As Reported Without application of Effect of Change Revenues Software as a service and platform as a service $ 322,399 $ 321,897 $ 502 License 142,565 163,788 (21,223 ) Maintenance 166,080 166,673 (593 ) Services 58,786 58,938 (152 ) Operating expenses Selling and marketing 93,305 88,667 4,638 Other income (expense) Interest income 8,249 601 7,648 Other, net (3,036 ) (2,495 ) (541 ) Income tax provision Income tax expense (benefit) 1,824 5,371 (3,547 ) The following summarizes the significant changes resulting from the adoption of ASC 606 compared to if the Company had continued to recognize revenues under ASC 985-605, Revenue Recognition: Software Receivables, Deferred Revenue, License Revenue, and Interest Income The change in receivables, deferred revenue, license revenue, and interest income is due to a change in the timing and the amount of recognition for software license revenues under ASC 606. Under ASC 605, the Company recognized revenue upon delivery provided (i) there is persuasive evidence of an arrangement, (ii) collection of the fee is considered probable, and (iii) the fee is fixed or determinable. For software license arrangements in which a significant portion of the fee is due more than 12 months after delivery or when payment terms are significantly beyond the Company’s standard business practice, the license fee is deemed not fixed or determinable. For software license arrangements in which the fee is not considered fixed or determinable, the license is recognized as revenue as payments become due and payable, provided all other conditions for revenue recognition have been met. License revenue under ASC 605 includes revenue from software license arrangements with extended payment terms for which the due and payable pattern of recognition was applied and revenue from renewals of software license arrangements in the period during which the renewal is signed. Under ASC 606, license revenue from these software license arrangements with extended payment terms is accelerated (i.e. upfront recognition) and adjusted for the effects of the financing component, if significant. The significant financing component in these software license arrangements is recognized as interest income over the extended payment period. As many of these software license arrangements were active as of the date the Company adopted ASC 606, the license fees are included in the Company’s cumulative adjustment to retained earnings. Revenue for license renewals is recognized when the customer can begin to use and benefit from the license, which is generally at the commencement of the license renewal period. Other Current Assets, Other Noncurrent Assets, and Selling and Marketing Under ASC 606, certain of the Company’s sales commissions meet the definition of incremental costs of obtaining a contract. Accordingly, these costs are capitalized and the expense is recognized as the related goods or services are transferred to the customer. Prior to the adoption of ASC 606, the Company recognized sales commission expenses as they were incurred. Deferred Income Taxes, Net The change in deferred income taxes is primarily due to the deferred tax effects resulting from the adjustment to retained earnings for the cumulative effect of applying ASC 606 to active contracts as of the adoption date. The adoption of ASC 606 had no impact in total on the Company’s cash flows from operations.

Debt

Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	3. Debt As of September 30, 2018, the Company had $288.9 million and $400.0 million outstanding under its Term Credit Facility and Senior Notes, respectively, with up to $500.0 million of unused borrowings under the Revolving Credit Facility portion of the Credit Agreement, as amended. Credit Agreement On February 24, 2017, the Company entered into an amended and restated credit agreement (the “Credit Agreement”), replacing the existing agreement, with a syndicate of financial institutions, as lenders, and Bank of America, N.A. (“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. 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 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 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. Senior Notes On August 21, 2018, the Company completed a $400.0 million offering of 5.750% Senior Notes due 2026 (the “2026 Notes”) at an issue price of 100% of the principal amount, in a private placement for resale to qualified institutional buyers. The 2026 Notes bear interest at a rate of 5.750% per year, payable semi-annually in arrears on February 15 and August 15 of each year, commencing on February 15, 2019. Interest will accrue from August 21, 2018. The 2026 Notes will mature on August 15, 2026. In connection with the issuance of the 2026 Notes, the Company incurred and paid debt issuance costs of $7.3 million as of September 30, 2018. The Company used the net proceeds of the offering described above to redeem in full the Company’s outstanding 6.375% Senior Notes due 2020 (the “2020 Notes”), including accrued interest, and repaid a portion of the outstanding amount under the Term Credit Facility. Maturities on long-term debt outstanding at September 30, 2018 are as follows: Fiscal year ending December 31, (in thousands) 2018 $ 3,958 2019 23,747 2020 23,747 2021 31,662 2022 205,803 Thereafter 400,000 Total $ 688,917 The Credit Agreement and 2026 Notes also contain certain customary mandatory prepayment provisions. If certain events, as specified in the Credit Agreement or 2026 Notes agreement, shall occur, the Company may be required to repay all or a portion of the amounts outstanding under the Credit Facility or 2026 Notes. The Credit Facility will mature on February 24, 2022 and the 2026 Notes will mature on August 15, 2026. The Revolving Credit Facility and 2026 Notes do not amortize and the Term Credit Facility does amortize, with principal payable in consecutive quarterly installments. The Credit Agreement and 2026 Notes contain certain customary affirmative covenants and negative covenants that limit or restrict, subject to certain exceptions, the incurrence of liens, indebtedness of subsidiaries, mergers, advances, investments, acquisitions, transactions with affiliates, change in nature of business and the sale of the assets. The Company is also required to maintain a consolidated leverage ratio at or below a specified amount and an interest coverage ratio at or above a specified amount. If an event of default, as specified in the Credit Agreement and 2026 Notes agreement, shall occur and be continuing, the Company may be required to repay all amounts outstanding under the Credit Facility and 2026 Notes. As of September 30, 2018, and at all times during the period, the Company was in compliance with its financial debt covenants. (in thousands) As of September 30, As of December 31, Term credit facility $ 288,917 $ 394,250 Revolving credit facility — 2,000 5.750% Senior Notes, due August 2026 400,000 — 6.375% Senior Notes, due August 2020 — 300,000 Debt issuance costs (13,993 ) (10,521 ) Total debt 674,924 685,729 Less current portion of term credit facility 21,768 20,750 Less current portion of debt issuance costs (3,003 ) (2,964 ) Total long-term debt $ 656,159 $ 667,943 Other During the nine months ended September 30, 2018, the Company financed certain multi-year license agreements for internally-used software for $11.9 million with annual payments through June 2023. As of September 30, 2018, $11.6 million is outstanding, of which $4.7 million and $6.9 million is included in other current liabilities and other noncurrent liabilities, respectively, in the accompanying condensed consolidated balance sheet. The $11.6 million has been treated as a non-cash

Stock-BasedCompensation Plans

Stock-BasedCompensation Plans	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-BasedCompensation Plans	4. Stock-Based 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, 2018 and 2017, totaled 112,549 and 121,765, respectively. Stock-Based Payments A summary of stock options issued pursuant to the Company’s stock incentive plans is as follows: Number of Weighted- Weighted- Aggregate Intrinsic Value of In-the- Money Options Outstanding as of December 31, 2017 6,162,717 $ 16.83 Granted 170,455 23.36 Exercised (1,262,994 ) 14.57 Forfeited (81,881 ) 18.62 Outstanding as of September 30, 2018 4,988,297 $ 17.60 6.30 $ 52,585,398 Exercisable as of September 30, 2018 3,533,425 $ 16.84 5.64 $ 39,930,860 The weighted-average grant date fair value of stock options granted during the nine months ended September 30, 2018 and 2017 was $7.03 and $6.24, respectively. The Company issued treasury shares for the exercise of stock options during the nine months ended September 30, 2018 and 2017. The total intrinsic value of stock options exercised during the nine months ended September 30, 2018 and 2017 was $13.6 million and $6.6 million, respectively. The fair value of options that do not vest based on the achievement of certain market conditions granted during the nine months ended September 30, 2018 and 2017 were estimated on the date of grant using the Black-Scholes option-pricing , Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Expected life (years) 5.6 5.6 Interest rate 2.7 % 1.9 % Volatility 26.4 % 29.4 % 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 not paid dividends and does not anticipate dividends to be paid in the future. Long-term Incentive Program Performance Share Awards A summary of nonvested long-term incentive program performance share awards (“LTIP performance shares”) outstanding as of September 30, 2018, and changes during the period are as follows: Nonvested LTIP Performance Shares Number of Weighted- Nonvested as of December 31, 2017 1,125,035 $ 18.94 Forfeited (89,582 ) 19.24 Nonvested as of September 30, 2018 1,035,453 $ 18.92 Restricted Share Awards A summary of nonvested restricted share awards (“RSAs”) as of September 30, 2018, and changes during the period are as follows: Nonvested Restricted Share Awards Number of Share Awards Weighted-Average Grant Nonvested as of December 31, 2017 503,237 $ 20.63 Vested (231,473 ) 21.20 Forfeited (47,411 ) 19.88 Nonvested as of September 30, 2018 224,353 $ 20.18 During the nine months ended September 30, 2018, a total of 231,473 RSA shares vested. The Company withheld 41,973 of those shares to pay the employees’ portion of the minimum payroll withholding taxes. Performance-Based Restricted Share Awards A summary of nonvested Performance-Based Restricted Share Awards (“PBRSAs”) as of September 30, 2018, and changes during the period are as follows: Nonvested Performance-Based Restricted Share Awards Number of Performance-Based Share Awards Weighted-Average Grant Nonvested as of December 31, 2017 173,636 $ 24.41 Vested (173,636 ) 24.41 Nonvested as of September 30, 2018 — $ — During the nine months ended September 30, 2018, a total of 173,636 PBRSA shares vested. The Company withheld 64,699 of those shares to pay the employees’ portion of the minimum payroll withholding taxes. Total Shareholder Return Awards During the nine months ended September 30, 2018 and 2017, the Company granted total shareholder return (“TSR”) awards, pursuant to the 2016 Equity and Performance Incentive Plan. 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 Nine Months Ended September 30, 2018 September 30, 2017 Expected life (years) 2.9 2.9 Interest rate 2.4 % 1.5 % Volatility 28.0 % 26.5 % Dividend Yield — — A summary of nonvested TSRs outstanding as of September 30, 2018, and changes during the period are as follows: Nonvested Total Shareholder Return Awards Number of Weighted- Average Nonvested as of December 31, 2017 143,649 $ 24.37 Granted 541,214 31.31 Forfeited (33,970 ) 29.90 Nonvested as of September 30, 2018 650,893 $ 29.85 Restricted Share Units During the nine months ended September 30, 2018, the Company granted restricted share units (“RSUs”) awards, pursuant to the 2016 Equity and Performance Incentive Plan. The awards generally have requisite service periods of three years and vest in increments of 33% on the anniversary of the grant dates. Under each arrangement, stock is issued without direct cost to the employee on the vesting date. The Company estimates the fair value of the RSUs based upon the market price of the Company’s stock at the date of grant. The Company recognizes compensation expense for RSUs on a straight-line basis over the requisite service period. A summary of nonvested RSUs as of September 30, 2018, and changes during the period are as follows: Nonvested Restricted Share Units Number of Weighted- Nonvested as of December 31, 2017 — $ — Granted 714,123 23.81 Vested (10,000 ) 25.72 Forfeited (38,739 ) 23.36 Nonvested as of September 30, 2018 665,384 $ 23.81 During the nine months ended September 30, 2018, a total of 10,000 RSU shares vested. As of September 30, 2018, there were unrecognized compensation costs of $14.3 million related to the TSRs, $12.6 million related to RSUs, $5.8 million related to the LTIP performance shares, $3.7 million related to nonvested stock options, and $3.2 million related to the nonvested RSAs, which the Company expects to recognize over weighted-average periods of 2.3 years, 2.3 years, 1.3 years, 0.9 years, and 1.4 years, respectively. The Company recorded stock-based compensation expenses recognized under ASC 718, Compensation – Stock Compensation

Software and Other Intangible A

Software and Other Intangible Assets	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Software and Other Intangible Assets	5. Software and Other Intangible Assets At September 30, 2018, software net book value totaling $147.3 million, net of $250.0 million of accumulated amortization, includes the net book value of software marketed for external sale of $30.9 million. The remaining software net book value of $116.4 million is comprised of various software that has been acquired or developed for internal use. At December 31, 2017, software net book value totaled $155.4 million, net of $230.7 million of accumulated amortization. Included in this amount is software marketed for external sale of $40.9 million. The remaining software net book value of $114.5 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, 2018 and 2017, totaled $2.6 million and $3.1 million, respectively. Software for resale amortization expense recorded in the nine months ended September 30, 2018 and 2017, totaled $9.6 million. 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 PaaS offerings. Amortization of software for internal use in the three months ended September 30, 2018 and 2017, totaled $10.2 million and $11.5 million, respectively. Amortization of software for internal use in the nine months ended September 30, 2018 and 2017, totaled $31.0 million and $34.1 million, 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: (in thousands) September 30, 2018 December 31, 2017 Gross Accumulated Net Balance Gross Accumulated Net Balance Customer relationships $ 300,782 $ (128,367 ) $ 172,415 $ 305,218 $ (116,677 ) $ 188,541 Trademarks and tradenames 16,450 (14,808 ) 1,642 16,646 (13,906 ) 2,740 $ 317,232 $ (143,175 ) $ 174,057 $ 321,864 $ (130,583 ) $ 191,281 Other intangible assets amortization expense for the three months ended September 30, 2018 and 2017, totaled $4.7 million and $4.9 million, respectively. Other intangible assets amortization expense for the nine months ended September 30, 2018 and 2017, totaled $14.4 million and $14.5 million, respectively. Based on capitalized software and other intangible assets at September 30, 2018, estimated amortization expense for future fiscal years is as follows: Fiscal Year Ending December 31, Software Other (in thousands) Remainder of 2018 $ 13,724 $ 4,670 2019 47,416 18,325 2020 37,964 17,438 2021 24,930 16,939 2022 11,957 16,789 2023 6,306 16,478 Thereafter 5,019 83,418 Total $ 147,316 $ 174,057

Corporate Restructuring and Oth

Corporate Restructuring and Other Organizational Changes	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Corporate Restructuring and Other Organizational Changes	6. Corporate Restructuring and Other Organizational Changes The components of corporate restructuring and other reorganization activities are included in the following table: (in thousands) Facility Balance, December 31, 2017 $ 5,945 Amounts paid during the period (1,342 ) Foreign currency translation (48 ) Balance, September 30, 2018 $ 4,555 Of the $4.6 million facility closure liability, $1.6 million and $3.0 million is recorded in other current liabilities and noncurrent liabilities, respectively, in the accompanying condensed consolidated balance sheet at September 30, 2018.

Common Stock and Treasury Stock

Common Stock and Treasury Stock	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Common Stock and Treasury Stock	7. Common Stock and Treasury Stock In 2005, the Company’s Board of Directors (“the Board”) approved a stock repurchase program authorizing the Company, as market and business conditions warrant, to acquire its common stock and periodically authorizes additional funds for the program. In February 2018, the Board approved $200.0 million for the stock repurchase program. The Company repurchased 2,346,427 shares for $54.5 million under the program during the nine months ended September 30, 2018. Under the program to date, the Company has repurchased 44,129,393 shares for approximately $547.8 million. The maximum remaining authorized for purchase under the stock repurchase program was $176.6 million as of September 30, 2018.

Earnings (loss) Per Share

Earnings (loss) Per Share	9 Months Ended
	Sep. 30, 2018
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 Nine Months Ended 2018 2017 2018 2017 Weighted average shares outstanding: Basic weighted average shares outstanding 115,889 118,254 115,615 117,096 Add: Dilutive effect of stock options 1,603 1,489 — — Diluted weighted average shares outstanding 117,492 119,743 115,615 117,096 The diluted earnings per share computation excludes 1.2 million and 3.3 million options to purchase shares, contingently issuable shares, and restricted share awards during the three months ended September 30, 2018 and 2017, respectively, as their effect would be anti-dilutive. The diluted loss per share computation excludes 8.0 million and 10.1 million options to purchase shares, contingently issuable shares, and restricted share awards during the nine months ended September 30, 2018 and 2017, respectively, as their effect would be anti-dilutive. Common stock outstanding as of September 30, 2018 and December 31, 2017, was 115,981,696 and 117,096,731, respectively.

Other, net

Other, net	9 Months Ended
	Sep. 30, 2018
Other Income and Expenses [Abstract]
Other, net	9. Other, net Other is comprised of foreign currency transaction losses of $1.3 million and $1.1 million for the three months ended September 30, 2018 and 2017, respectively. Other is comprised of foreign currency transaction losses of $3.0 million and $2.2 million for the nine months ended September 30, 2018 and 2017, respectively.

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Information	10. Segment Information The Company reports financial performance based on its segments, ACI On Premise and ACI On Demand, and analyzes Segment Adjusted EBITDA as a measure of segment profitability. The Company’s chief 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 Segment Adjusted EBITDA, for the segments ACI On Premise and ACI On Demand, separate from the Corporate operations. ACI On Premise ACI On Demand Revenue is attributed to the reportable segments based upon the product sold and mechanism for delivery to the customer. Expenses are attributed to the reportable segments in one of three methods, (1) direct costs of the segment, (2) labor costs that can be attributed based upon time tracking for individual products, or (3) costs that are allocated. Allocated costs are generally marketing and sales related activities as well as information technology and facilities related expense for which multiple segments benefit. The Company also allocates certain depreciation costs to the segments. Segment Adjusted EBITDA is the measure reported to the CODM for purposes of making decisions on allocating resources and assessing the performance of the Company’s segments and, therefore, Segment Adjusted EBITDA is presented in conformity with ASC 280, Segment Reporting. Corporate and other unallocated expenses consists of the corporate overhead costs that are not allocated to reportable segments. These overhead costs relate to human resources, finance, legal, accounting, merger and acquisition activity, and other costs that are not considered when management evaluates segment performance. The following is selected financial data for the Company’s reportable segments (in thousands): Three Months Ended Nine Months Ended September 30, 2018 September 30, 2017 September 30, 2018 September 30, 2017 Revenue ACI On Premise $ 141,006 $ 126,006 $ 367,431 $ 385,108 ACI On Demand 104,519 99,729 322,399 312,688 Total revenue $ 245,525 $ 225,735 $ 689,830 $ 697,796 Segment Adjusted EBITDA ACI On Premise $ 77,819 $ 65,138 $ 171,477 $ 196,060 ACI On Demand 3,270 (1,241 ) (4,327 ) (8,794 ) Depreciation and amortization (23,545 ) (25,553 ) (72,889 ) (76,772 ) Stock-based compensation (6,575 ) (8,084 ) (20,642 ) (22,724 ) Corporate and unallocated expenses (22,610 ) (18,837 ) (64,122 ) (111,167 ) Interest, net (9,810 ) (9,209 ) (23,406 ) (29,777 ) Other, net (1,304 ) (1,059 ) (3,036 ) (2,176 ) Income (loss) before income taxes $ 17,245 $ 1,155 $ (16,945 ) $ (55,350 ) Depreciation and amortization ACI On Premise $ 2,772 $ 3,321 $ 8,596 $ 9,915 ACI On Demand 7,906 8,576 23,468 25,973 Corporate 12,867 13,656 40,825 40,884 Total depreciation and amortization $ 23,545 $ 25,553 $ 72,889 $ 76,772 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 and revenues by geographic location and primary solution category for the periods indicated (in thousands): Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 (in thousands) ACI ACI Total ACI ACI Total Primary Geographic Markets Americas - United States $ 26,022 $ 88,401 $ 114,423 $ 36,189 $ 84,669 $ 120,858 Americas - Other 16,709 2,409 19,118 16,874 2,314 19,188 EMEA 80,738 12,385 93,123 47,919 12,104 60,023 Asia Pacific 17,537 1,324 18,861 25,024 642 25,666 Total $ 141,006 $ 104,519 $ 245,525 $ 126,006 $ 99,729 $ 225,735 Primary Solution Categories Bill Payments $ — $ 64,134 $ 64,134 $ — $ 62,328 $ 62,328 Digital Channels/Online 7,499 9,327 16,826 13,403 11,555 24,958 Merchant Payments 6,216 18,052 24,268 6,423 12,458 18,881 Payments Risk Management 7,259 11,068 18,327 10,887 11,192 22,079 Real Time Payments 23,704 540 24,244 11,745 520 12,265 Retail Payments 96,328 1,398 97,726 83,548 1,676 85,224 Total $ 141,006 $ 104,519 $ 245,525 $ 126,006 $ 99,729 $ 225,735 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 (in thousands) ACI ACI Total ACI ACI Total Primary Geographic Markets Americas - United States $ 82,280 $ 275,171 $ 357,451 $ 118,311 $ 268,125 $ 386,436 Americas - Other 45,269 7,077 52,346 44,591 7,168 51,759 EMEA 181,913 36,819 218,732 166,379 35,554 201,933 Asia Pacific 57,969 3,332 61,301 55,827 1,841 57,668 Total $ 367,431 $ 322,399 $ 689,830 $ 385,108 $ 312,688 $ 697,796 Primary Solution Categories Bill Payments $ — $ 204,673 $ 204,673 $ — $ 201,259 $ 201,259 Digital Channels/Online 27,779 30,281 58,060 36,118 33,771 69,889 Merchant Payments 16,476 44,423 60,899 20,175 35,816 55,991 Payments Risk Management 25,711 34,524 60,235 22,855 33,604 56,459 Real Time Payments 53,086 1,474 54,560 35,195 2,418 37,613 Retail Payments 244,379 7,024 251,403 270,765 5,820 276,585 Total $ $ $ $ $ $ The following is selected financial data for the Company’s long-lived assets by geographic location for the periods indicated: (in thousands) September 30, December 31, Long lived assets United States $ 834,386 $ 759,513 Other 708,424 613,556 $ 1,542,810 $ 1,373,069 No single customer accounted for more than 10% of the Company’s consolidated revenues during the three and nine months ended September 30, 2018 and 2017. Aggregate revenues attributable to our customers in Canada accounted for 11.8% of the Company’s consolidated revenues during the three months ended September 30, 2018. No other country outside the United States and Canada accounted for more than 10% of the Company’s consolidated revenues during the three months ended September 30, 2018. During the three months ended September 30, 2017, no other country outside the United States accounted for more than 10% of the Company’s consolidated revenues. No other country outside the United States accounted for more than 10% of the Company’s consolidated revenues during the nine months ended September 30, 2018 and 2017.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes On December 22, 2017, the Tax Cuts and Jobs Act (“Tax Act”) was signed into U.S. Law. In December 2017, the Securities and Exchange Commission staff issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Tax Cuts and Jobs Act one-time At September 30, 2018, the Company has not yet determined its policy election with respect to whether to record deferred taxes for basis differences expected to reverse as a result of the Global Intangible Low-Taxed The effective tax rate for the three months ended September 30, 2018 was 12%. The Company reported a tax charge for the nine months ended September 30, 2018 while reporting a pretax loss for the same period. The resulting effective tax rate is a negative 11%. The earnings of the Company’s foreign entities for the three and nine months ended September 30, 2018 were $27.3 million and $32.7 million, respectively. The effective tax rate for the three and nine months ended September 30, 2018 were impacted by profits in certain foreign jurisdictions taxed at lower rates and equity compensation tax benefits, partially offset by lower domestic tax benefits resulting from the current GILTI tax and Base Erosion and Anti-Abuse Tax (“BEAT”) charges. 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, respectively. 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 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 $27.8 million as of September 30, 2018 and $27.2 million as of December 31, 2017, excluding related liabilities for interest and penalties of $1.1 million and $1.2 million as of September 30, 2018 and December 31, 2017, 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 $3.7 million, due to the settlement of various audits and the expiration of statutes of limitation. During the three months ended September 30, 2018, the Company made a final determination in accordance with SAB 118 that the unremitted earnings and profits of its entities in Australia, Ireland, New Zealand, Romania, Russia and South Africa are no longer permanently reinvested. The Company continues to evaluate its position regarding any outside basis differences for its entities in those countries. The Company recorded a $0.5 million foreign tax charge related to the remittance of earnings from those countries. There are unremitted foreign earnings in other countries which continue to be reinvested indefinitely. For entities in countries not listed above, the Company continues to evaluate the potential foreign and U.S. state tax liabilities that would result from future repatriations from those non-U.S.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Loss	12. Accumulated Other Comprehensive Loss Activity within accumulated other comprehensive loss for the nine months ended September 30, 2018 and 2017, which consists of foreign currency translation adjustments, were as follows: (in thousands) Accumulated Balance at December 31, 2017 $ (77,356 ) Other comprehensive loss (11,110 ) Balance at September 30, 2018 $ (88,466 ) Accumulated Balance at December 31, 2016 $ (94,100 ) Other comprehensive income 14,526 Balance at September 30, 2017 $ (79,574 )

Condensed Consolidated Financ_2

Condensed Consolidated Financial Statements (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Other Current Assets and Other Current Liabilities	Other Current Assets and Other Current Liabilities (in thousands) September 30, 2018 December 31, Settlement deposits $ 5,477 $ 22,282 Settlement receivables 11,462 30,063 Other 6,305 5,781 Total other current assets $ 23,244 $ 58,126 (in thousands) September 30, 2018 December 31, Settlement payables $ 16,221 $ 48,953 Accrued interest 2,726 7,291 Vendor financed licenses 5,973 1,862 Royalties payable 7,148 9,264 Other 28,007 35,534 Total other current liabilities $ 60,075 $ 102,904 Individuals and businesses settle their obligations to the Company’s various clients, primarily utility and other public sector clients, using credit or debit cards or via ACH payments. The Company creates a receivable for the amount due from the credit or debit card company and an offsetting payable to the client. Upon confirmation that the funds have been received, the Company settles the obligation to the client. Due to timing, in some instances, the Company may receive the funds into bank accounts controlled by and in the Company’s name that are not disbursed to its clients by the end of the day resulting in a settlement deposit on the Company’s books.
Off Balance Sheet Accounts	Off Balance Sheet Accounts The Company also enters into agreements with certain clients to process payment funds on their behalf. When an ACH or automated teller machine network payment transaction is processed, a transaction is initiated to withdraw funds from the designated source account and deposit them into a settlement account, which is a trust account maintained for the benefit of the Company’s clients. A simultaneous transaction is initiated to transfer funds from the settlement account to the intended destination account. These “back to back” transactions are designed to settle at the same time, usually overnight, such that the Company receives the funds from the source at the same time as it sends the funds to their destination. However, due to the transactions being with various financial institutions there may be timing differences that result in float balances. These funds are maintained in accounts for the benefit of the client which is separate from the Company’s corporate assets. As the Company does not take ownership of the funds, the settlement accounts are not included in the Company’s balance sheet. The Company is entitled to interest earned on the fund balances. The collection of interest on these settlement accounts is considered in the Company’s determination of its fee structure for clients and represents a portion of the payment for services performed by the Company. The amount of settlement funds as of September 30, 2018 and December 31, 2017 were $185.4 million and $238.9 million, respectively.
Fair Value	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 2026 Senior Notes was $407.1 million at September 30, 2018. The fair value of the Company’s 2020 Senior Notes was $305.7 million at December 31, 2017. The fair values of cash and cash equivalents approximate the carrying values due to the short period of time to maturity (Level 2 of the fair value hierarchy).
Goodwill	Goodwill In accordance with ASC 350, Intangibles – Goodwill and Other, Recoverability of goodwill is measured using a discounted cash flow model incorporating discount rates commensurate with the risks involved. Use of a discounted cash flow model is common practice in impairment testing in the absence of available transactional market evidence to determine the fair value. The calculated fair value was substantially in excess of the current carrying value for all reporting units based upon the October 1, 2017 annual impairment test and there have been no indications of impairment in the subsequent periods.
New Accounting Standards Recently Adopted	New Accounting Standards Recently Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers 340-40, Other Assets and Deferred Costs – Contracts with Customers 340-40”). Revenue Recognition 340-40 In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments 2016-15 2016-15 In October 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other than Inventory 2016-16, 2016-16 2016-16 In August 2018, the FASB issued ASU 2018-05, Intangibles—Goodwill and Other–Internal-Use 2018-05”). 2018-05 350-40, Intangibles – Goodwill and Other — Internal-Use 350-40”), 2018-05
Recently Issued Accounting Standards Not Yet Effective	Recently Issued Accounting Standards Not Yet Effective In February 2016, the FASB issued ASU 2016-02, Leases The Company has established a cross-functional project team to assess implementing changes to its systems, processes, and controls, in conjunction with a comprehensive review of existing lease agreements. The Company expects the adoption of ASC 842 will have a material impact on its condensed consolidated balance sheet as its rights and obligations from its existing operating leases will be recognized on the balance sheet as assets and liabilities. As of September 30, 2018, the Company’s undiscounted minimum commitments under noncancelable operating leases was approximately $79.4 million. The Company does not expect the adoption of ASC 842 to have a material impact on its results of operations or statement of cash flows. In February 2018, the FASB issued ASU 2018-02, Income Statement-Reporting Comprehensive Income: Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. of ASU 2018-02
Revenue Recognition	Revenue Recognition In accordance with ASC 606 revenue is recognized upon transfer of control of promised products and/or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products and services. Revenue is recognized net of any taxes collected from customers and subsequently remitted to governmental authorities. Contract Combination. Software as a Service (“SaaS”) and Platform as a Service (“PaaS”) Arrangements License Arrangements. Payment terms for the Company’s software license arrangements generally include fixed license and capacity fees that are payable up front or over time. These arrangements may also include incremental usage-based fees that are payable when the customer exceeds its contracted license capacity limits. The Company accounts for capacity overages as a usage-based royalty that is recognized when the usage occurs. When a software license arrangement contains payment terms that are extended beyond one year, a significant financing component may exist. The significant financing component is calculated as the difference between the stated value and present value of the software license fees and is recognized as interest income over the extended payment period. The total fixed software license fee net of the significant financing component is recognized as revenue at the point in time when the software is transferred to the customer. For those software license arrangements that include customer-specific acceptance provisions, such provisions are generally presumed to be substantive and the Company does not recognize revenue until the earlier of the receipt of a written customer acceptance, objective demonstration that the delivered product meets the customer-specific acceptance criteria, or the expiration of the acceptance period. The Company recognizes revenues on such arrangements upon the earlier of receipt of written acceptance or the first production use of the software by the customer. For software license arrangements in which the Company acts as a distributor of another company’s product, and in certain circumstances, modifies or enhances the product, revenues are recorded on a gross basis. These include arrangements in which the Company takes control of the products and is responsible for providing the product or service. For software license arrangements in which the Company acts as a sales agent for another company’s product, revenues are recorded on a net basis. These include arrangements in which the Company does not take control of products and is not responsible for providing the product or service. For software license arrangements in which the Company utilizes a third-party distributor or sales agent, the Company recognizes revenue upon transfer of control of the software license(s) to the third-party distributor or sales agent. The Company’s software license arrangements typically provide the customer with a standard 90-day Software license arrangements typically include an initial post contract customer support (maintenance or “PCS”) term of one year with subsequent renewals for additional years within the initial license period. The Company’s promise to those customers who elect to purchase PCS represents a stand-ready performance obligation that is distinct from the license performance obligation and recognized over the PCS term. The Company also provides various professional services to customers with software licenses. These include project management, software implementation, and software modification services. Revenues from arrangements to provide professional services are generally distinct from the other promises in the contract(s) and are recognized as the related services are performed. Consideration payable under these arrangements is either fixed fee or on a time-and-materials The Company estimates the standalone selling price (“SSP”) for maintenance and professional services based on observable standalone sales. The Company applies the residual approach to estimate the SSP for software licenses. Refer to Note 10, Segment Information, Significant Judgments The Company applies judgment in determining the customer’s ability and intention to pay, which is based on a variety of factors including the customer’s historical payment experience or, in the case of a new customer, published credit and financial information. The Company also applies judgment in determining the term of an arrangement when early termination rights are provided to the customer. The Company’s software license arrangements with its customers often include multiple promises to transfer licensed software products and services. Determining whether the products and/or services are distinct performance obligations that should be accounted for separately may require significant judgment. The Company’s SaaS and PaaS arrangements may include variable consideration in the form of usage-based fees. If the arrangement that includes variable consideration in the form of usage-based fees does not meet the allocation exception for variable consideration, the Company estimates the amount of variable consideration at the outset of the arrangement using either the expected value or most likely amount method, depending on the specifics of each arrangement. These estimates are constrained to the extent that it is probable that a significant reversal of incremental revenue will not occur and are updated each reporting period as additional information becomes available. Judgment is used in determining: (1) whether the financing component in a software license agreement is significant and, if so, (2) the discount rate used in calculating the significant financing component. The Company assesses the significance of the financing component based on the ratio of license fees paid over time to total license fees. If determined to be significant, the financing component is calculated using a rate that discounts the license fees to the cash selling price. Judgment is also used in assessing whether the extension of payment terms in a software license arrangement results in variable consideration and, if so, the amount to be included in the transaction price. The Company applies the portfolio approach to estimating the amount of variable consideration in these arrangements using the most likely amount method that is based on the Company’s historical collection experience under similar arrangements. Significant judgment is required to determine the SSP for each performance obligation, the amount allocated to each performance obligation and whether it depicts the amount that the Company expects to receive in exchange for the related product and/or service. As the selling prices of the Company’s software licenses are highly variable, the Company estimates SSP of its software licenses using the residual approach when the software license is sold with other services and observable SSPs exist for the other services. The Company uses a range of amounts to estimate SSP for maintenance and services. These ranges are based on standalone sales and vary based on the type of service and geographic region. If the SSP of a performance obligation is not directly observable, the Company will maximize observable inputs to determine its SSP. Contract Balances Timing of revenue recognition may differ from the timing of invoicing to customers. The Company records an accrued receivable when revenue is recognized prior to invoicing and the Company’s right to consideration only requires the passage of time, or deferred revenue when revenue is recognized subsequent to invoicing. Total receivables represent amounts billed and amounts earned that are to be billed in the future (i.e., accrued receivables). Included in accrued receivables are services and SaaS and PaaS revenues earned in the current period but billed in the following period and amounts due under multi-year software license arrangements with extended payment terms for which the Company has an unconditional right to invoice and receive payment in the future. September 30, December 31, (in thousands) 2018 2017 Billed Receivables $ 172,395 $ 240,137 Allowance for doubtful accounts (3,598 ) (4,799 ) Billed Receivables, net $ 168,797 $ 235,338 Accrued receivables 324,019 27,507 Significant financing component (31,343 ) — Total accrued receivables, net 292,676 27,507 Less current accrued receivables 120,532 27,507 Less current significant financing component (9,688 ) — Total long-term accrued receivables, net $ 181,832 $ — Total receivables, net $ 461,473 $ 262,845 No customer accounted for more than 10% of the Company’s consolidated receivables balance as of September 30, 2018 or December 31, 2017. Deferred revenue includes amounts due or received from customers for software licenses, maintenance, services, and/or SaaS and PaaS services in advance of recording the related revenue. Changes in deferred revenue were as follows: Deferred (in thousands) Revenue Balance, January 1, 2018 $ 145,344 Deferral of revenue 145,573 Recognition of deferred revenue (144,935 ) Foreign currency translation (3,525 ) Balance, September 30, 2018 $ 142,457 Revenue allocated to remaining performance obligations represents contracted revenue that will be recognized in future periods, which is comprised of deferred revenue and amounts that will be invoiced and recognized as revenue in future periods. This does not include: (1) Revenue that will be recognized in future periods from capacity overages that are accounted for as a usage-based royalty. (2) SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the ‘right to invoice’ practical expedient. (3) SaaS and PaaS revenue from variable consideration that will be recognized in accordance with the direct allocation method. Revenue allocated to remaining performance obligations was $599.9 million as of September 30, 2018, of which the Company expects to recognize approximately 48% over the next 12 months and the remainder thereafter. During the three and nine-month periods ended September 30, 2018, the revenue recognized by the Company from performance obligations satisfied in previous periods was not material. Costs to Obtain and Fulfill a Contract The Company accounts for costs to obtain and fulfill its contracts in accordance with ASC 340, Other Assets and Deferred Costs The Company capitalizes certain of its sales commissions that meet the definition of incremental costs of obtaining a contract and for which the amortization period is greater than one year. The costs associated with those sales commissions is capitalized during the period in which the Company becomes obligated to pay the commissions and is amortized over the period in which the related products or services are transferred to the customer. As of September 30, 2018, $0.6 million and $15.4 million of these costs are included in other current and other non-current The Company capitalizes costs incurred to fulfill its contracts that: (1) relate directly to the arrangement, (2) are expected to generate resources that will be used to satisfy the Company’s performance obligation under the arrangement, and (3) are expected to be recovered through revenue generated under the arrangement. Contract fulfillment costs are expensed as the Company transfers the related services to the customer. As of September 30, 2018, $0.1 million and $12.6 million of these costs are included in other current and other non-current Financial Statement Effect of Applying ASC 606 As the modified retrospective transition method does not result in recast of the prior year financial statements, ASC 606 requires the Company to provide additional disclosures for the amount by which each financial statement line item is affected by adoption of the standard and explanation of the reasons for significant changes. The financial statement line items affected by adoption of ASC 606 are as follows: September 30, 2018 (in thousands) As Reported Without Effect of Change Higher / (Lower) Assets Receivables, net of allowances $ 279,641 $ 202,829 $ 76,812 Recoverable income taxes 8,233 6,711 1,522 Prepaid expenses 25,875 26,616 (741 ) Other current assets 23,244 22,844 400 Accrued receivables, net 181,832 — 181,832 Deferred income taxes, net 28,179 67,261 (39,082 ) Other noncurrent assets 54,477 40,275 14,202 Liabilities Deferred revenue 93,668 108,162 (14,494 ) Income taxes payable 1,600 153 1,447 Other current liabilities 60,075 60,310 (235 ) Deferred income taxes, net 26,372 6,161 20,211 Stockholders’ equity Total stockholders’ equity 962,938 734,925 228,013 For the Three Months Ended September 30, 2018 (in thousands) As Reported Without application of ASC 606 Effect of Change Higher / (Lower) Revenues Software as a service and platform as a service $ 104,519 $ 103,764 $ 755 License 68,964 69,052 (88 ) Maintenance 54,373 54,659 (286 ) Services 17,669 18,184 (515 ) Operating expenses Selling and marketing 28,252 26,397 1,855 Other income (expense) Interest income 2,763 230 2,533 Other, net (1,304 ) (1,155 ) (149 ) Income tax provision Income tax expense (benefit) 2,012 2,804 (792 ) For the Nine Months Ended September 30, 2018 (in thousands) As Reported Without application of Effect of Change Revenues Software as a service and platform as a service $ 322,399 $ 321,897 $ 502 License 142,565 163,788 (21,223 ) Maintenance 166,080 166,673 (593 ) Services 58,786 58,938 (152 ) Operating expenses Selling and marketing 93,305 88,667 4,638 Other income (expense) Interest income 8,249 601 7,648 Other, net (3,036 ) (2,495 ) (541 ) Income tax provision Income tax expense (benefit) 1,824 5,371 (3,547 ) The following summarizes the significant changes resulting from the adoption of ASC 606 compared to if the Company had continued to recognize revenues under ASC 985-605, Revenue Recognition: Software Receivables, Deferred Revenue, License Revenue, and Interest Income The change in receivables, deferred revenue, license revenue, and interest income is due to a change in the timing and the amount of recognition for software license revenues under ASC 606. Under ASC 605, the Company recognized revenue upon delivery provided (i) there is persuasive evidence of an arrangement, (ii) collection of the fee is considered probable, and (iii) the fee is fixed or determinable. For software license arrangements in which a significant portion of the fee is due more than 12 months after delivery or when payment terms are significantly beyond the Company’s standard business practice, the license fee is deemed not fixed or determinable. For software license arrangements in which the fee is not considered fixed or determinable, the license is recognized as revenue as payments become due and payable, provided all other conditions for revenue recognition have been met. License revenue under ASC 605 includes revenue from software license arrangements with extended payment terms for which the due and payable pattern of recognition was applied and revenue from renewals of software license arrangements in the period during which the renewal is signed. Under ASC 606, license revenue from these software license arrangements with extended payment terms is accelerated (i.e. upfront recognition) and adjusted for the effects of the financing component, if significant. The significant financing component in these software license arrangements is recognized as interest income over the extended payment period. As many of these software license arrangements were active as of the date the Company adopted ASC 606, the license fees are included in the Company’s cumulative adjustment to retained earnings. Revenue for license renewals is recognized when the customer can begin to use and benefit from the license, which is generally at the commencement of the license renewal period. Other Current Assets, Other Noncurrent Assets, and Selling and Marketing Under ASC 606, certain of the Company’s sales commissions meet the definition of incremental costs of obtaining a contract. Accordingly, these costs are capitalized and the expense is recognized as the related goods or services are transferred to the customer. Prior to the adoption of ASC 606, the Company recognized sales commission expenses as they were incurred. Deferred Income Taxes, Net The change in deferred income taxes is primarily due to the deferred tax effects resulting from the adjustment to retained earnings for the cumulative effect of applying ASC 606 to active contracts as of the adoption date. The adoption of ASC 606 had no impact in total on the Company’s cash flows from operations.
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.
Segment Information	The Company reports financial performance based on its segments, ACI On Premise and ACI On Demand, and analyzes Segment Adjusted EBITDA as a measure of segment profitability. The Company’s chief 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 Segment Adjusted EBITDA, for the segments ACI On Premise and ACI On Demand, separate from the Corporate operations. ACI On Premise ACI On Demand Revenue is attributed to the reportable segments based upon the product sold and mechanism for delivery to the customer. Expenses are attributed to the reportable segments in one of three methods, (1) direct costs of the segment, (2) labor costs that can be attributed based upon time tracking for individual products, or (3) costs that are allocated. Allocated costs are generally marketing and sales related activities as well as information technology and facilities related expense for which multiple segments benefit. The Company also allocates certain depreciation costs to the segments. Segment Adjusted EBITDA is the measure reported to the CODM for purposes of making decisions on allocating resources and assessing the performance of the Company’s segments and, therefore, Segment Adjusted EBITDA is presented in conformity with ASC 280, Segment Reporting. Corporate and other unallocated expenses consists of the corporate overhead costs that are not allocated to reportable segments. These overhead costs relate to human resources, finance, legal, accounting, merger and acquisition activity, and other costs that are not considered when management evaluates segment performance.

Condensed Consolidated Financ_3

Condensed Consolidated Financial Statements (Tables)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Components of Other Current Assets and Other Current Liabilities	Other Current Assets and Other Current Liabilities (in thousands) September 30, December 31, Settlement deposits $ 5,477 $ 22,282 Settlement receivables 11,462 30,063 Other 6,305 5,781 Total other current assets $ 23,244 $ 58,126 (in thousands) September 30, December 31, Settlement payables $ 16,221 $ 48,953 Accrued interest 2,726 7,291 Vendor financed licenses 5,973 1,862 Royalties payable 7,148 9,264 Other 28,007 35,534 Total other current liabilities $ 60,075 $ 102,904

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Total Receivables	Total receivables represent amounts billed and amounts earned that are to be billed in the future (i.e., accrued receivables). Included in accrued receivables are services and SaaS and PaaS revenues earned in the current period but billed in the following period and amounts due under multi-year software license arrangements with extended payment terms for which the Company has an unconditional right to invoice and receive payment in the future. September 30, December 31, (in thousands) 2018 2017 Billed Receivables $ 172,395 $ 240,137 Allowance for doubtful accounts (3,598 ) (4,799 ) Billed Receivables, net $ 168,797 $ 235,338 Accrued receivables 324,019 27,507 Significant financing component (31,343 ) — Total accrued receivables, net 292,676 27,507 Less current accrued receivables 120,532 27,507 Less current significant financing component (9,688 ) — Total long-term accrued receivables, net $ 181,832 $ — Total receivables, net $ 461,473 $ 262,845
Changes in Deferred Revenue	Changes in deferred revenue were as follows: Deferred (in thousands) Revenue Balance, January 1, 2018 $ 145,344 Deferral of revenue 145,573 Recognition of deferred revenue (144,935 ) Foreign currency translation (3,525 ) Balance, September 30, 2018 $ 142,457
Financial Statement Effect of Applying ASC 606	The financial statement line items affected by adoption of ASC 606 are as follows: September 30, 2018 (in thousands) As Reported Without Effect of Change Higher / (Lower) Assets Receivables, net of allowances $ 279,641 $ 202,829 $ 76,812 Recoverable income taxes 8,233 6,711 1,522 Prepaid expenses 25,875 26,616 (741 ) Other current assets 23,244 22,844 400 Accrued receivables, net 181,832 — 181,832 Deferred income taxes, net 28,179 67,261 (39,082 ) Other noncurrent assets 54,477 40,275 14,202 Liabilities Deferred revenue 93,668 108,162 (14,494 ) Income taxes payable 1,600 153 1,447 Other current liabilities 60,075 60,310 (235 ) Deferred income taxes, net 26,372 6,161 20,211 Stockholders’ equity Total stockholders’ equity 962,938 734,925 228,013 For the Three Months Ended September 30, 2018 (in thousands) As Reported Without application of ASC 606 Effect of Change Higher / (Lower) Revenues Software as a service and platform as a service $ 104,519 $ 103,764 $ 755 License 68,964 69,052 (88 ) Maintenance 54,373 54,659 (286 ) Services 17,669 18,184 (515 ) Operating expenses Selling and marketing 28,252 26,397 1,855 Other income (expense) Interest income 2,763 230 2,533 Other, net (1,304 ) (1,155 ) (149 ) Income tax provision Income tax expense (benefit) 2,012 2,804 (792 ) For the Nine Months Ended September 30, 2018 (in thousands) As Reported Without application of Effect of Change Revenues Software as a service and platform as a service $ 322,399 $ 321,897 $ 502 License 142,565 163,788 (21,223 ) Maintenance 166,080 166,673 (593 ) Services 58,786 58,938 (152 ) Operating expenses Selling and marketing 93,305 88,667 4,638 Other income (expense) Interest income 8,249 601 7,648 Other, net (3,036 ) (2,495 ) (541 ) Income tax provision Income tax expense (benefit) 1,824 5,371 (3,547 )

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Maturities on Long-Term Debt Outstanding	Maturities on long-term debt outstanding at September 30, 2018 are as follows: Fiscal year ending December 31, (in thousands) 2018 $ 3,958 2019 23,747 2020 23,747 2021 31,662 2022 205,803 Thereafter 400,000 Total $ 688,917
Carrying Value of Debt	As of September 30, 2018, and at all times during the period, the Company was in compliance with its financial debt covenants. (in thousands) As of September 30, As of December 31, Term credit facility $ 288,917 $ 394,250 Revolving credit facility — 2,000 5.750% Senior Notes, due August 2026 400,000 — 6.375% Senior Notes, due August 2020 — 300,000 Debt issuance costs (13,993 ) (10,521 ) Total debt 674,924 685,729 Less current portion of term credit facility 21,768 20,750 Less current portion of debt issuance costs (3,003 ) (2,964 ) Total long-term debt $ 656,159 $ 667,943

Stock-BasedCompensation Plans (

Stock-BasedCompensation Plans (Tables)	9 Months Ended
	Sep. 30, 2018
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 Weighted- Weighted- Aggregate Intrinsic Value of In-the- Money Options Outstanding as of December 31, 2017 6,162,717 $ 16.83 Granted 170,455 23.36 Exercised (1,262,994 ) 14.57 Forfeited (81,881 ) 18.62 Outstanding as of September 30, 2018 4,988,297 $ 17.60 6.30 $ 52,585,398 Exercisable as of September 30, 2018 3,533,425 $ 16.84 5.64 $ 39,930,860
Black-Scholes Option-Pricing Model [Member]
Estimated Fair Value of Options Granted Pricing Model with Weighted-Average Assumptions	The fair value of options that do not vest based on the achievement of certain market conditions granted during the nine months ended September 30, 2018 and 2017 were estimated on the date of grant using the Black-Scholes option-pricing , Nine Months Ended Nine Months Ended September 30, 2018 September 30, 2017 Expected life (years) 5.6 5.6 Interest rate 2.7 % 1.9 % Volatility 26.4 % 29.4 % Dividend yield — —
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 Nine Months Ended September 30, 2018 September 30, 2017 Expected life (years) 2.9 2.9 Interest rate 2.4 % 1.5 % Volatility 28.0 % 26.5 % 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, 2018, and changes during the period are as follows: Nonvested LTIP Performance Shares Number of Weighted- Nonvested as of December 31, 2017 1,125,035 $ 18.94 Forfeited (89,582 ) 19.24 Nonvested as of September 30, 2018 1,035,453 $ 18.92
TSR Plan [Member]
Summary of Nonvested Performance Share Awards and Changes During Period	A summary of nonvested TSRs outstanding as of September 30, 2018, and changes during the period are as follows: Nonvested Total Shareholder Return Awards Number of Weighted- Average Nonvested as of December 31, 2017 143,649 $ 24.37 Granted 541,214 31.31 Forfeited (33,970 ) 29.90 Nonvested as of September 30, 2018 650,893 $ 29.85
Restricted Share Awards (RSAs) [Member]
Summary of Nonvested Restricted Share and Changes During Period	A summary of nonvested restricted share awards (“RSAs”) as of September 30, 2018, and changes during the period are as follows: Nonvested Restricted Share Awards Number of Share Awards Weighted-Average Grant Nonvested as of December 31, 2017 503,237 $ 20.63 Vested (231,473 ) 21.20 Forfeited (47,411 ) 19.88 Nonvested as of September 30, 2018 224,353 $ 20.18
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, 2018, and changes during the period are as follows: Nonvested Performance-Based Restricted Share Awards Number of Performance-Based Share Awards Weighted-Average Grant Nonvested as of December 31, 2017 173,636 $ 24.41 Vested (173,636 ) 24.41 Nonvested as of September 30, 2018 — $ —
Restricted Share Units [Member]
Summary of Nonvested Restricted Share and Changes During Period	A summary of nonvested RSUs as of September 30, 2018, and changes during the period are as follows: Nonvested Restricted Share Units Number of Weighted- Nonvested as of December 31, 2017 — $ — Granted 714,123 23.81 Vested (10,000 ) 25.72 Forfeited (38,739 ) 23.36 Nonvested as of September 30, 2018 665,384 $ 23.81

Software and Other Intangible_2

Software and Other Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying Amount and Accumulated Amortization of Other Intangible Assets	The carrying amount and accumulated amortization of the Company’s other intangible assets that were subject to amortization at each balance sheet date are as follows: (in thousands) September 30, 2018 December 31, 2017 Gross Accumulated Net Balance Gross Accumulated Net Balance Customer relationships $ 300,782 $ (128,367 ) $ 172,415 $ 305,218 $ (116,677 ) $ 188,541 Trademarks and tradenames 16,450 (14,808 ) 1,642 16,646 (13,906 ) 2,740 $ 317,232 $ (143,175 ) $ 174,057 $ 321,864 $ (130,583 ) $ 191,281
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, 2018, estimated amortization expense for future fiscal years is as follows: Fiscal Year Ending December 31, Software Other (in thousands) Remainder of 2018 $ 13,724 $ 4,670 2019 47,416 18,325 2020 37,964 17,438 2021 24,930 16,939 2022 11,957 16,789 2023 6,306 16,478 Thereafter 5,019 83,418 Total $ 147,316 $ 174,057

Corporate Restructuring and O_2

Corporate Restructuring and Other Organizational Changes (Tables)	9 Months Ended
	Sep. 30, 2018
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 Balance, December 31, 2017 $ 5,945 Amounts paid during the period (1,342 ) Foreign currency translation (48 ) Balance, September 30, 2018 $ 4,555

Earnings (loss) Per Share (Tabl

Earnings (loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2018
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 Nine Months Ended 2018 2017 2018 2017 Weighted average shares outstanding: Basic weighted average shares outstanding 115,889 118,254 115,615 117,096 Add: Dilutive effect of stock options 1,603 1,489 — — Diluted weighted average shares outstanding 117,492 119,743 115,615 117,096

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Selected Segment Financial Data, Revenues, Operating Income (Loss) and Income (Loss) Before Income Taxes	The following is selected financial data for the Company’s reportable segments (in thousands): Three Months Ended Nine Months Ended September 30, 2018 September 30, 2017 September 30, 2018 September 30, 2017 Revenue ACI On Premise $ 141,006 $ 126,006 $ 367,431 $ 385,108 ACI On Demand 104,519 99,729 322,399 312,688 Total revenue $ 245,525 $ 225,735 $ 689,830 $ 697,796 Segment Adjusted EBITDA ACI On Premise $ 77,819 $ 65,138 $ 171,477 $ 196,060 ACI On Demand 3,270 (1,241 ) (4,327 ) (8,794 ) Depreciation and amortization (23,545 ) (25,553 ) (72,889 ) (76,772 ) Stock-based compensation (6,575 ) (8,084 ) (20,642 ) (22,724 ) Corporate and unallocated expenses (22,610 ) (18,837 ) (64,122 ) (111,167 ) Interest, net (9,810 ) (9,209 ) (23,406 ) (29,777 ) Other, net (1,304 ) (1,059 ) (3,036 ) (2,176 ) Income (loss) before income taxes $ 17,245 $ 1,155 $ (16,945 ) $ (55,350 ) Depreciation and amortization ACI On Premise $ 2,772 $ 3,321 $ 8,596 $ 9,915 ACI On Demand 7,906 8,576 23,468 25,973 Corporate 12,867 13,656 40,825 40,884 Total depreciation and amortization $ 23,545 $ 25,553 $ 72,889 $ 76,772
Selected Segment Financial Data, Revenues and Long lived Assets	The following is selected financial data for the Company’s geographical areas and revenues by geographic location and primary solution category for the periods indicated (in thousands): Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 (in thousands) ACI ACI Total ACI ACI Total Primary Geographic Markets Americas - United States $ 26,022 $ 88,401 $ 114,423 $ 36,189 $ 84,669 $ 120,858 Americas - Other 16,709 2,409 19,118 16,874 2,314 19,188 EMEA 80,738 12,385 93,123 47,919 12,104 60,023 Asia Pacific 17,537 1,324 18,861 25,024 642 25,666 Total $ 141,006 $ 104,519 $ 245,525 $ 126,006 $ 99,729 $ 225,735 Primary Solution Categories Bill Payments $ — $ 64,134 $ 64,134 $ — $ 62,328 $ 62,328 Digital Channels/Online 7,499 9,327 16,826 13,403 11,555 24,958 Merchant Payments 6,216 18,052 24,268 6,423 12,458 18,881 Payments Risk Management 7,259 11,068 18,327 10,887 11,192 22,079 Real Time Payments 23,704 540 24,244 11,745 520 12,265 Retail Payments 96,328 1,398 97,726 83,548 1,676 85,224 Total $ 141,006 $ 104,519 $ 245,525 $ 126,006 $ 99,729 $ 225,735 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 (in thousands) ACI ACI Total ACI ACI Total Primary Geographic Markets Americas - United States $ 82,280 $ 275,171 $ 357,451 $ 118,311 $ 268,125 $ 386,436 Americas - Other 45,269 7,077 52,346 44,591 7,168 51,759 EMEA 181,913 36,819 218,732 166,379 35,554 201,933 Asia Pacific 57,969 3,332 61,301 55,827 1,841 57,668 Total $ 367,431 $ 322,399 $ 689,830 $ 385,108 $ 312,688 $ 697,796 Primary Solution Categories Bill Payments $ — $ 204,673 $ 204,673 $ — $ 201,259 $ 201,259 Digital Channels/Online 27,779 30,281 58,060 36,118 33,771 69,889 Merchant Payments 16,476 44,423 60,899 20,175 35,816 55,991 Payments Risk Management 25,711 34,524 60,235 22,855 33,604 56,459 Real Time Payments 53,086 1,474 54,560 35,195 2,418 37,613 Retail Payments 244,379 7,024 251,403 270,765 5,820 276,585 Total $ $ $ $ $ $ The following is selected financial data for the Company’s long-lived assets by geographic location for the periods indicated: (in thousands) September 30, December 31, Long lived assets United States $ 834,386 $ 759,513 Other 708,424 613,556 $ 1,542,810 $ 1,373,069

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Activity within Accumulated Other Comprehensive Loss	Activity within accumulated other comprehensive loss for the nine months ended September 30, 2018 and 2017, which consists of foreign currency translation adjustments, were as follows: (in thousands) Accumulated Balance at December 31, 2017 $ (77,356 ) Other comprehensive loss (11,110 ) Balance at September 30, 2018 $ (88,466 ) Accumulated Balance at December 31, 2016 $ (94,100 ) Other comprehensive income 14,526 Balance at September 30, 2017 $ (79,574 )

Condensed Consolidated Financ_4

Condensed Consolidated Financial Statements - Components of Other Current Assets and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Other Current Assets and Liabilities [Line Items]
Other	$ 6,305	$ 5,781
Total other current assets	23,244	58,126
Settlement payables	16,221	48,953
Accrued interest	2,726	7,291
Vendor financed licenses	5,973	1,862
Royalties payable	7,148	9,264
Other	28,007	35,534
Total other current liabilities	60,075	102,904
Settlement deposits [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	5,477	22,282
Settlement receivables [Member]
Other Current Assets and Liabilities [Line Items]
Other assets settlement	$ 11,462	$ 30,063

Condensed Consolidated Financ_5

Condensed Consolidated Financial Statements - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Summary Of Significant Accounting Policies [Line Items]
Amount of off balance sheet settlement funds	$ 185,400	$ 238,900
Goodwill	909,691	909,691
Undiscounted Minimum Commitments Under Noncancelable operating leases	79,400
Accounting Standards Update 2014-09 [Member]
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect on retained earnings	244,000
ACI On Premise [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	725,900
ACI On Demand [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill	183,800
Level 2 [Member] | Senior Notes 2026 [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair value senior note	$ 407,100
Level 2 [Member] | Senior Notes 2020 [Member]
Summary Of Significant Accounting Policies [Line Items]
Fair value senior note		$ 305,700

Revenue - Additional Informatio

Revenue - Additional Information (Detail) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2018USD ($)
Revenue [Line Items]
Software licensing arrangements warranty, description		The Company's software license arrangements typically provide the customer with a standard 90-day assurance-type warranty.
Software licensing arrangements warranty period		90 days
Initial post contract customer support period		1 year
Percentage of receivables as of June 30, 2018 or December 31, 2017		No customer accounted for more than 10% of the Company's consolidated receivables balance as of September 30, 2018 or December 31, 2017.
Revenue allocated to remaining performance obligations	$ 599.9	$ 599.9
Percentage of revenue allocated to remaining performance obligations to be recognized over the next 12 months	48.00%	48.00%
Capitalized sales commissions minimum amortization period		1 year
Selling and Marketing [Member]
Revenue [Line Items]
Amortization of capitalized sales commissions	$ 2.1	$ 6.4
Cost of Revenue [Member]
Revenue [Line Items]
Amortization of capitalized contract costs	1.1	3.5
Other Current Assets [Member]
Revenue [Line Items]
Capitalized sales commissions	0.6	0.6
Capitalized contract costs, current	0.1	0.1
Other Noncurrent Assets [Member]
Revenue [Line Items]
Capitalized sales commissions	15.4	15.4
Capitalized contract costs, noncurrent	$ 12.6	$ 12.6

Revenue - Receivables and Conce

Revenue - Receivables and Concentration of Credit Risk (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable, Net, Current [Abstract]
Billed Receivables	$ 172,395	$ 240,137
Allowance for doubtful accounts	(3,598)	(4,799)
Billed Receivables, net	168,797	235,338
Accrued receivables	324,019	27,507
Significant financing component	(31,343)
Total accrued receivables, net	292,676	27,507
Less current accrued receivables	120,532	27,507
Less current significant financing component	(9,688)
Total long-term accrued receivables, net	181,832
Total receivables, net	$ 461,473	$ 262,845

Revenue - Changes in Deferred R

Revenue - Changes in Deferred Revenue (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Deferred Revenue Disclosure [Abstract]
Deferred Revenue, Beginning Balance	$ 145,344
Deferral of revenue	145,573
Recognition of deferred revenue	(144,935)
Foreign currency translation	(3,525)
Deferred Revenue, Ending Balance	$ 142,457

Revenue - Financial Statement E

Revenue - Financial Statement Effect of Applying ASC 606 (Balance Sheet) (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Receivables, net of allowances	$ 279,641	$ 262,845
Recoverable income taxes	8,233	7,921
Prepaid expenses	25,875	23,219
Other current assets	23,244	58,126
Accrued receivables, net	181,832
Deferred income taxes, net	28,179	66,749
Other noncurrent assets	54,477	36,483
Liabilities
Deferred revenue	93,668	107,543
Income taxes payable	1,600	9,898
Other current liabilities	60,075	102,904
Deferred income taxes, net	26,372	16,910
Stockholders' equity
Total stockholders' equity	962,938	$ 764,597
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Assets
Receivables, net of allowances	202,829
Recoverable income taxes	6,711
Prepaid expenses	26,616
Other current assets	22,844
Deferred income taxes, net	67,261
Other noncurrent assets	40,275
Liabilities
Deferred revenue	108,162
Income taxes payable	153
Other current liabilities	60,310
Deferred income taxes, net	6,161
Stockholders' equity
Total stockholders' equity	734,925
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Assets
Receivables, net of allowances	76,812
Recoverable income taxes	1,522
Prepaid expenses	(741)
Other current assets	400
Accrued receivables, net	181,832
Deferred income taxes, net	(39,082)
Other noncurrent assets	14,202
Liabilities
Deferred revenue	(14,494)
Income taxes payable	1,447
Other current liabilities	(235)
Deferred income taxes, net	20,211
Stockholders' equity
Total stockholders' equity	$ 228,013

Revenue - Financial Statement_2

Revenue - Financial Statement Effect of Applying ASC 606 (Income Statement) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating expenses
Selling and marketing	$ 28,252	$ 25,236	$ 93,305	$ 81,190
Other income (expense)
Interest income	2,763	165	8,249	421
Other, net	(1,304)	(1,059)	(3,036)	(2,176)
Income tax provision
Income tax expense (benefit)	2,012	(2,233)	1,824	(27,321)
Software as a service and platform as a service [Member]
Revenues
Total revenues	104,519	99,761	322,399	312,677
License [Member]
Revenues
Total revenues	68,964	50,017	142,565	163,578
Maintenance [Member]
Revenues
Total revenues	54,373	$ 56,349	166,080	$ 166,829
Service [Member]
Revenues
Total revenues	17,669		58,786
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Operating expenses
Selling and marketing	26,397		88,667
Other income (expense)
Interest income	230		601
Other, net	(1,155)		(2,495)
Income tax provision
Income tax expense (benefit)	2,804		5,371
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Software as a service and platform as a service [Member]
Revenues
Total revenues	103,764		321,897
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | License [Member]
Revenues
Total revenues	69,052		163,788
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Maintenance [Member]
Revenues
Total revenues	54,659		166,673
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Service [Member]
Revenues
Total revenues	18,184		58,938
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Operating expenses
Selling and marketing	1,855		4,638
Other income (expense)
Interest income	2,533		7,648
Other, net	(149)		(541)
Income tax provision
Income tax expense (benefit)	(792)		(3,547)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Software as a service and platform as a service [Member]
Revenues
Total revenues	755		502
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | License [Member]
Revenues
Total revenues	(88)		(21,223)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Maintenance [Member]
Revenues
Total revenues	(286)		(593)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] | Service [Member]
Revenues
Total revenues	$ (515)		$ (152)

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Aug. 21, 2018	Feb. 24, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
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, 2018, for the Credit Facility was 3.99%
Credit facility, interest rate margin above federal fund rate			0.50%
Credit facility, interest rate margin above one-month LIBOR rate			1.00%
Credit facility, borrowing rate			3.99%
Debt Issuance cost			$ 13,993,000		$ 10,521,000
Debt Issuance cost paid			$ 7,253,000	$ 5,340,000
Credit Facility maturity date			Feb. 24, 2022
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Unused borrowings			$ 500,000,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding			288,900,000
Senior Notes [Member]
Debt Instrument [Line Items]
Senior notes amount outstanding			400,000,000
Senior Notes 2026 [Member]
Debt Instrument [Line Items]
Senior notes amount outstanding	$ 400,000,000
Issue price percentage of senior notes of the principal amount	100.00%
Percentage of interest rate on notes	5.75%
Senior Notes maturity date	Aug. 15, 2026
Debt Issuance cost			7,300,000
Debt Issuance cost paid			$ 7,300,000
Maturity date of senior notes			Aug. 15, 2026
Senior Note Due 2022 [Member]
Debt Instrument [Line Items]
Percentage of interest rate on notes			6.375%
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
Credit Agreement [Member] | Term Credit Facility [Member]
Debt Instrument [Line Items]
Credit facilities, maximum borrowing capacity		$ 415,000,000
Credit facilities, maturity		5 years
Multi-year License Agreement [Member]
Debt Instrument [Line Items]
Financed internally-used software			$ 11,900,000
Annual payments due date			Through June 2023
Other current liabilities			$ 4,700,000
Other non-current liabilities			6,900,000
Outstanding other Long-term Debt			$ 11,600,000
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 - Maturities on Long-Term Debt Outstanding (Detail) $ in Thousands	Sep. 30, 2018USD ($)
Debt Disclosure [Abstract]
2,018	$ 3,958
2,019	23,747
2,020	23,747
2,021	31,662
2,022	205,803
Thereafter	400,000
Total	$ 688,917

Debt - Carrying Value of Debt (

Debt - Carrying Value of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt issuance costs	$ (13,993)	$ (10,521)
Total debt	674,924	685,729
Current portion of long-term debt	18,765	17,786
Less current portion of debt issuance costs	(3,003)	(2,964)
Total long-term debt	656,159	667,943
5.75% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Total debt	400,000
6.375% Senior Notes, due August 2020 [Member]
Debt Instrument [Line Items]
Total debt		300,000
Term Credit Facility [Member]
Debt Instrument [Line Items]
Total debt	288,917	394,250
Current portion of long-term debt	$ 21,768	20,750
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Total debt		$ 2,000

Debt - Carrying Value of Debt_2

Debt - Carrying Value of Debt (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2018
5.75% Senior Notes, due August 2026 [Member]
Debt Instrument [Line Items]
Percentage of interest rate on notes	5.75%
Maturity date of senior notes	Aug. 15, 2026
6.375% Senior Notes, due August 2020 [Member]
Debt Instrument [Line Items]
Percentage of interest rate on notes	6.375%
Maturity date of senior notes	Aug. 15, 2020

Stock-Based Compensation Plans

Stock-Based Compensation Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued under ESPP			112,549	121,765
Incentive plan, weighted-average grant date fair value of stock options granted			$ 7.03	$ 6.24
Incentive plan, total intrinsic value of stock options exercised			$ 13,600,000	$ 6,600,000
Expected dividend yield			0.00%
Dividend paid			$ 0
Stock-based compensation expenses	$ 6,575,000	$ 8,084,000	$ 20,642,000	22,724,000
Stock-based compensation expenses tax benefits	$ 1,500,000	$ 2,700,000	$ 3,600,000	$ 7,700,000
Employee Stock Purchase Plan 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock reserved for issuance	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	$ 3,700,000		$ 3,700,000
Unrecognized compensation costs, weighted-average recognition periods			10 months 24 days
Restricted Share Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU shares vested			10,000
Restricted share awards, vesting increments on the anniversary dates of grants			33.00%
Awards granted requisite service period			3 years
Unrecognized compensation costs	12,600,000		$ 12,600,000
Unrecognized compensation costs, weighted-average recognition periods			2 years 3 months 18 days
Restricted Share Awards (RSAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU shares vested			231,473
Shares withheld to pay employees' portion of minimum payroll withholding taxes			41,973
Performance-Based Restricted Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU shares vested			173,636
Shares withheld to pay employees' portion of minimum payroll withholding taxes			64,699
Unrecognized compensation costs	3,200,000		$ 3,200,000
Unrecognized compensation costs, weighted-average recognition periods			1 year 4 months 24 days
LTIP Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 5,800,000		$ 5,800,000
Unrecognized compensation costs, weighted-average recognition periods			1 year 3 months 18 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	$ 14,300,000		$ 14,300,000
Unrecognized compensation costs, weighted-average recognition periods			2 years 3 months 18 days

Stock-Based Compensation Plan_2

Stock-Based Compensation Plans - Summary of Stock Options Issued Pursuant to Stock Incentive Plans (Detail)	9 Months Ended
	Sep. 30, 2018USD ($)$ / sharesshares
Number of Shares
Outstanding, Beginning Balance | shares	6,162,717
Granted | shares	170,455
Exercised | shares	(1,262,994)
Forfeited | shares	(81,881)
Outstanding, Ending Balance | shares	4,988,297
Number of Shares Exercisable, Ending Balance | shares	3,533,425
Weighted-Average Exercise Price
Beginning Balance | $ / shares	$ 16.83
Granted | $ / shares	23.36
Exercised | $ / shares	14.57
Forfeited | $ / shares	18.62
Ending Balance | $ / shares	17.60
Weighted-Average Exercise Price Exercisable, Ending Balance | $ / shares	$ 16.84
Weighted-Average Remaining Contractual Term (Years)
Weighted Average Remaining Contractual Term (Years), Outstanding as of end of period	6 years 3 months 19 days
Weighted-Average Remaining Contractual Term (Years), Exercisable as of end of period	5 years 7 months 21 days
Aggregate Intrinsic Value of In-the-Money Options
Aggregate Intrinsic Value of In-the-Money Options, Outstanding as of end of period | $	$ 52,585,398
Aggregate Intrinsic Value of In-the-Money Options, Exercisable as of end of period | $	$ 39,930,860

Stock-Based Compensation Plan_3

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, 2018	Sep. 30, 2017
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 7 months 6 days
Interest rate	2.70%	1.90%
Volatility	26.40%	29.40%
Dividend yield	0.00%	0.00%

Stock-Based Compensation Plan_4

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, 2018$ / sharesshares
Number of Shares at Expected Attainment
Beginning Balance | shares	1,125,035
Forfeited | shares	(89,582)
Ending Balance | shares	1,035,453
Weighted-Average Grant Date Fair Value
Beginning Balance | $ / shares	$ 18.94
Forfeited | $ / shares	19.24
Ending Balance | $ / shares	$ 18.92

Stock-Based Compensation Plan_5

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, 2018$ / sharesshares
Nonvested Restricted Share Awards
Beginning Balance | shares	503,237
Vested | shares	(231,473)
Forfeited | shares	(47,411)
Ending Balance | shares	224,353
Weighted-Average Grant Date Fair Value
Beginning Balance | $ / shares	$ 20.63
Vested | $ / shares	21.20
Forfeited | $ / shares	19.88
Ending Balance | $ / shares	$ 20.18

Stock-Based Compensation Plan_6

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, 2018$ / sharesshares
Nonvested Restricted Share Awards
Beginning Balance | shares	173,636
Vested | shares	(173,636)
Ending Balance | shares	0
Weighted-Average Grant Date Fair Value
Beginning Balance | $ / shares	$ 24.41
Vested | $ / shares	24.41
Ending Balance | $ / shares	$ 0

Stock-Based Compensation Plan_7

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, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
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 24 days	2 years 10 months 24 days
Interest rate	2.40%	1.50%
Volatility	28.00%	26.50%
Dividend yield	0.00%	0.00%

Stock-Based Compensation Plan_8

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, 2018$ / sharesshares
Number of Shares at Expected Attainment
Beginning Balance | shares	143,649
Granted | shares	541,214
Forfeited | shares	(33,970)
Ending Balance | shares	650,893
Weighted-Average Grant Date Fair Value
Beginning Balance | $ / shares	$ 24.37
Granted | $ / shares	31.31
Forfeited | $ / shares	29.90
Ending Balance | $ / shares	$ 29.85

Stock-Based Compensation Plan_9

Stock-Based Compensation Plans - Summary of Nonvested Restricted Share Unit and Changes During Period (Detail) - Restricted Share Units [Member]	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Nonvested Restricted Share Awards
Beginning Balance | shares	0
Granted | shares	714,123
Vested | shares	(10,000)
Forfeited | shares	(38,739)
Ending Balance | shares	665,384
Weighted-Average Grant Date Fair Value
Beginning Balance | $ / shares	$ 0
Granted | $ / shares	23.81
Vested | $ / shares	25.72
Forfeited | $ / shares	23.36
Ending Balance | $ / shares	$ 23.81

Software and Other Intangible_3

Software and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Software, net	$ 147,316		$ 147,316		$ 155,386
Software, accumulated amortization	250,000		250,000		230,700
Other intangible assets amortization expense	4,700	$ 4,900	14,400	$ 14,500
Software Marketed for External Sale [Member]
Finite-Lived Intangible Assets [Line Items]
Software, net	30,900		30,900		40,900
Software, amortization expense	2,600	3,100	$ 9,600	9,600
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	116,400		$ 116,400		$ 114,500
Software, amortization expense	$ 10,200	$ 11,500	$ 31,000	$ 34,100
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_4

Software and Other Intangible Assets - Carrying Amount and Accumulated Amortization of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 317,232	$ 321,864
Accumulated Amortization	(143,175)	(130,583)
Net Balance	174,057	191,281
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	300,782	305,218
Accumulated Amortization	(128,367)	(116,677)
Net Balance	172,415	188,541
Trademarks and Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	16,450	16,646
Accumulated Amortization	(14,808)	(13,906)
Net Balance	$ 1,642	$ 2,740

Software and Other Intangible_5

Software and Other Intangible Assets - Estimated Amortization Expense for Future Fiscal Years Based on Capitalized Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Net Balance	$ 174,057	$ 191,281
Software [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2018	13,724
2,019	47,416
2,020	37,964
2,021	24,930
2,022	11,957
2,023	6,306
Thereafter	5,019
Net Balance	147,316
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Remainder of 2018	4,670
2,019	18,325
2,020	17,438
2,021	16,939
2,022	16,789
2,023	16,478
Thereafter	83,418
Net Balance	$ 174,057

Corporate Restructuring and O_3

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, 2018USD ($)
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 5,945
Amounts paid during the period	(1,342)
Foreign currency translation	(48)
Ending balance	$ 4,555

Corporate Restructuring and O_4

Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) - Facility Closures [Member] - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 4,555	$ 5,945
Other Current Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,600
Other Noncurrent Liabilities [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3,000

Common Stock and Treasury Sto_2

Common Stock and Treasury Stock - Additional Information (Detail) - USD ($)	9 Months Ended	73 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Feb. 28, 2018
Stock authorized to purchase under stock repurchase program			$ 200,000,000
Repurchase of common stock, shares	2,346,427	44,129,393
Repurchase of common stock, value	$ 54,500,000	$ 547,800,000
Maximum [Member]
Remaining value of shares authorized for purchase under the stock repurchase program	$ 176,600,000	$ 176,600,000

Earnings (Loss) Per Share - Rec

Earnings (Loss) Per Share - Reconciliation of Average Share Amounts used to Compute Both Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Weighted average shares outstanding:
Basic weighted average shares outstanding	115,889	118,254	115,615	117,096
Add: Dilutive effect of stock options	1,603	1,489
Diluted weighted average shares outstanding	117,492	119,743	115,615	117,096

Earnings (Loss) Per Share - Add

Earnings (Loss) Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Earnings Per Share [Abstract]
Options to purchase shares, restricted share awards, and contingently issuable shares excluded from diluted net loss per share computation	1,200,000	3,300,000	8,000,000	10,100,000
Common stock outstanding	115,981,696		115,981,696		117,096,731

Other, net - Additional Informa

Other, net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other Income and Expenses [Abstract]
Foreign currency transaction losses	$ (1.3)	$ (1.1)	$ (3)	$ (2.2)

Selected Segment Financial Data

Selected Segment Financial Data, Revenues and Operating Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenues	$ 245,525	$ 225,735	$ 689,830	$ 697,796
Stock-based compensation	(6,575)	(8,084)	(20,642)	(22,724)
Corporate and unallocated expenses	(22,610)	(18,837)	(64,122)	(111,167)
Interest, net	(9,810)	(9,209)	(23,406)	(29,777)
Other, net	(1,304)	(1,059)	(3,036)	(2,176)
Income (loss) before income taxes	17,245	1,155	(16,945)	(55,350)
Depreciation and amortization expense	23,545	25,553	72,889	76,772
ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues	141,006	126,006	367,431	385,108
ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues	104,519	99,729	322,399	312,688
Operating Segments [Member] | ACI On Premise [Member]
Segment Reporting Information [Line Items]
Revenues	141,006	126,006	367,431	385,108
Segment Adjusted EBITDA	77,819	65,138	171,477	196,060
Depreciation and amortization expense	2,772	3,321	8,596	9,915
Operating Segments [Member] | ACI On Demand [Member]
Segment Reporting Information [Line Items]
Revenues	104,519	99,729	322,399	312,688
Segment Adjusted EBITDA	3,270	(1,241)	(4,327)	(8,794)
Depreciation and amortization expense	7,906	8,576	23,468	25,973
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization expense	$ 12,867	$ 13,656	$ 40,825	$ 40,884

Selected Segment Financial Da_2

Selected Segment Financial Data, Revenues and Long lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 245,525	$ 225,735	$ 689,830	$ 697,796
Long lived assets
Long lived assets	1,542,810		1,542,810		$ 1,373,069
Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	64,134	62,328	204,673	201,259
Digital Channels/Online [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,826	24,958	58,060	69,889
Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,268	18,881	60,899	55,991
Payments Risk Management [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,327	22,079	60,235	56,459
Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	24,244	12,265	54,560	37,613
Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	97,726	85,224	251,403	276,585
ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	141,006	126,006	367,431	385,108
ACI On Premise [Member] | Digital Channels/Online [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,499	13,403	27,779	36,118
ACI On Premise [Member] | Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,216	6,423	16,476	20,175
ACI On Premise [Member] | Payments Risk Management [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,259	10,887	25,711	22,855
ACI On Premise [Member] | Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23,704	11,745	53,086	35,195
ACI On Premise [Member] | Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	96,328	83,548	244,379	270,765
ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	104,519	99,729	322,399	312,688
ACI On Demand [Member] | Bill Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	64,134	62,328	204,673	201,259
ACI On Demand [Member] | Digital Channels/Online [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,327	11,555	30,281	33,771
ACI On Demand [Member] | Merchant Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,052	12,458	44,423	35,816
ACI On Demand [Member] | Payments Risk Management [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,068	11,192	34,524	33,604
ACI On Demand [Member] | Real Time Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	540	520	1,474	2,418
ACI On Demand [Member] | Retail Payments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,398	1,676	7,024	5,820
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	114,423	120,858	357,451	386,436
Long lived assets
Long lived assets	834,386		834,386		759,513
United States [Member] | ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	26,022	36,189	82,280	118,311
United States [Member] | ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	88,401	84,669	275,171	268,125
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,118	19,188	52,346	51,759
Long lived assets
Long lived assets	708,424		708,424		$ 613,556
Other [Member] | ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	16,709	16,874	45,269	44,591
Other [Member] | ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,409	2,314	7,077	7,168
EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	93,123	60,023	218,732	201,933
EMEA [Member] | ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	80,738	47,919	181,913	166,379
EMEA [Member] | ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	12,385	12,104	36,819	35,554
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,861	25,666	61,301	57,668
Asia Pacific [Member] | ACI On Premise [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	17,537	25,024	57,969	55,827
Asia Pacific [Member] | ACI On Demand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,324	$ 642	$ 3,332	$ 1,841

Segment Information - Additiona

Segment Information - Additional Information (Detail)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Customer Concentration Risk [Member]
Segment Reporting Information [Line Items]
Description of customer revenue accounted for more than 10% of consolidated revenue		No single customer accounted for more than 10% of the Company's consolidated revenues during the three and nine months ended September 30, 2018 and 2017.
Geographic Concentration Risk [Member]
Segment Reporting Information [Line Items]
Description of customer revenue accounted for more than 10% of consolidated revenue		No other country outside the United States and Canada accounted for more than 10% of the Company's consolidated revenues during the three months ended September 30, 2018. During the three months ended September 30, 2017, no other country outside the United States accounted for more than 10% of the Company's consolidated revenues. No other country outside the United States accounted for more than 10% of the Company's consolidated revenues during the nine months ended September 30, 2018 and 2017.
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member]
Segment Reporting Information [Line Items]
Percentage of revenues attributable to customers in Canada	11.80%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Provisional tax expense recognized					$ 35.9
Adjustment to estimate related to executive compensation, tax benefit			$ 2.8
Tax expense for current impact of GILTI provisions			$ 5
Effective tax rate, percentage	12.00%	(193.00%)	(11.00%)	49.00%
Earnings (losses) of foreign entities	$ 27.3	$ 15.2	$ 32.7	$ 40.6
Unrecognized tax benefit for uncertain tax positions	27.8		27.8		27.2
Accrued interest and penalties related to income tax liabilities	1.1		1.1		$ 1.2
Decrease in unrecognized tax benefits due to expiration of statutes of limitations and settlement of various audits	3.7		$ 3.7
Tax Cuts and Jobs Act of 2017, foreign tax charge related to remittance of earnings	$ 0.5

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Loss - Activity within Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ 764,597
Other comprehensive income (loss)	$ (3,862)	$ (594)	(11,110)	$ 14,526
Ending balance	962,938		962,938
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(77,356)	(94,100)
Ending balance	$ (88,466)	$ (79,574)	$ (88,466)	$ (79,574)