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Amortization of operating lease right-of-use assets Operating Lease, Right-of-Use Asset, Periodic Reduction Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Senior Notes Senior Notes [Member] Total current assets Assets, Current Total receivables, net Accounts Receivable, after Allowance for Credit Loss Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] All Individuals All Individuals [Member] Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Vendor financed licenses Other Notes Payable, Current Litigation Case [Domain] Litigation Case [Domain] Other, net Other (expense) income Other Nonoperating Income (Expense) Entity Filer Category Entity Filer Category Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Amount approved for repurchase Stock Repurchase Program, Authorized Amount Unrecognized tax benefit for uncertain tax positions Unrecognized Tax Benefits PEO Name PEO Name Customer concentration risk, percentage Concentration Risk, Percentage Other Other Sundry Liabilities, Current Real-Time Payments Real Time Payments [Member] Real Time Payments. 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receivables, net Accrued Receivables, Net Amount received for services rendered and products shipped, but not yet billed, for non-contractual agreements net of the significant financing component. Discontinued Operations, Disposed of by Sale Discontinued Operations, Disposed of by Sale [Member] Consolidation Consolidation, Policy [Policy Text Block] Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Maximum remaining amount authorized for purchase Stock Repurchase Program, Remaining Authorized Repurchase Amount Monte Carlo Simulation Model Monte Carlo Simulation Valuation Model Monte Carlo Simulation Valuation Model [Member] Monte carlo simulation valuation model. Termination Date Trading Arrangement Termination Date Amount of off balance sheet settlement funds Settlement Funds Balance The balance of the settlement funds at period end. Settlement funds are trust accounts maintained for the benefit of the Company's clients. They are not included in the Company's balance sheet. Accounts payable Increase (Decrease) in Accounts Payable Common stock, shares authorized (in shares) Common Stock, Shares Authorized Software, amortization expense Capitalized Computer Software, Amortization Repayment of revolving credit facility Repayments of Lines of Credit Issuing and Acquiring Issuing And Acquiring [Member] Issuing And Acquiring Repurchase program, amount paid for shares repurchased to date Treasury Stock, Value, Acquired, Cost Method, To Date Treasury Stock, Value, Acquired, Cost Method, To Date Long-term debt, amount outstanding Total Long-Term Debt, Gross Adjustments to reconcile net income (loss) to net cash flows from operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] All Trading Arrangements All Trading Arrangements [Member] All Adjustments to Compensation All Adjustments to Compensation [Member] Award Timing Disclosures [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Initial Term Loan Initial Term Loan [Member] Initial Term Loan [Member] Foreign currency translation Contract With Customer, Liability, Foreign Currency Translation Amount of increase (decrease) in Contract With Customer Liability Foreign Currency Translation. Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unused borrowings Debt Instrument, Unused Borrowing Capacity, Amount Deferred income taxes Deferred Income Tax Expense (Benefit) Proceeds from exercises of stock options Proceeds from Stock Options Exercised Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Services Technology Service [Member] Short-term Debt, Type [Axis] Short-Term Debt, Type [Axis] 2026 Finite-Lived Intangible Asset, Expected Amortization, Year Three Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Segment Adjusted EBITDA Segment Adjusted E B I T D A Segment Adjusted EBITDA is defined as earnings (loss) from operations before interest, income tax expense (benefit), depreciation and amortization adjusted to exclude stock-based compensation and net other income (expense). Equity Method Investment Equity Method Investments [Policy Text Block] Insider Trading Arrangements [Line Items] Net after-tax gain (loss) sale Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax 2024 Long-Term Debt, Maturity, Year One Aggregate intrinsic value of in-the-money options, outstanding, end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Amortization Amortization, Excluding Operating Leases And Debt Issuance Costs Amortization, Excluding Operating Leases And Debt Issuance Costs Other Current Liabilities Other Liabilities, Current [Abstract] Schedule of Grant Date Fair Value Weighted-Average Assumptions, Awards Other Than Options Schedule Of Share Based Payment Award Other Than Stock Options, Valuation Assumptions [Table Text Block] Tabular disclosure of the significant assumptions used during the year to estimate the fair value of awards other than stock options, including, but not limited to: (a) expected term of share awards and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two Adjustment to Compensation, Amount Adjustment to Compensation Amount Purchases of software and distribution rights Payments to Acquire Software Transition services agreement, migration period Transition Services Agreement, Migration Period Transition Services Agreement, Migration Period Document Period End Date Document Period End Date Proceeds from revolving credit facility Proceeds from Lines of Credit Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Disposal Group Name [Axis] Disposal Group Name [Axis] Weighted average exercise price, exercisable, ending balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Amount outstanding on overdraft facility Line of Credit Facility, Fair Value of Amount Outstanding Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Income tax expense (benefit) Income Tax Expense (Benefit) Other Non-US [Member] Aggregate Intrinsic Value of In-the-Money Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Employee compensation Employee-related Liabilities, Current Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Revenue Benchmark Revenue Benchmark [Member] Name Trading Arrangement, Individual Name Total other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Litigation payments Litigation Settlement, Contingent Consideration, Liability Litigation Settlement, Contingent Consideration, Liability Equity [Abstract] Equity [Abstract] One Equity Partners One Equity Partners [Member] One Equity Partners [Member] Research and development Research and Development Expense, Software (Excluding Acquired in Process Cost) Revenues Revenue from Contract with Customer, Excluding Assessed Tax Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Fraud Management Fraud Management [Member] Fraud Management Software and Other Intangible Assets Intangible Assets Disclosure [Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Shares withheld to pay employees' portion of minimum payroll withholding taxes (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Interest, net Interest Income (Expense), Net Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Credit Facility [Domain] Credit Facility [Domain] Repurchase of common stock (in shares) Shares repurchased (in shares) Treasury Stock, Shares, Acquired Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Deferral of revenue Contract with Customer, Liability, Additions Amount of revenue deferred in the current period for which consideration has been received or is receivable and an obligation exists to transfer goods or services to the customer. Long-term debt Total long-term debt Long-Term Debt, Excluding Current Maturities Diluted (in shares) Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Schedule of Changes in Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Weighted Average Remaining Contractual Term (Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] Operating expenses Operating Expenses [Abstract] Revenue Revenue from Contract with Customer [Text Block] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Balance Sheet Location [Axis] Balance Sheet Location [Axis] TOTAL ASSETS Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover page. Cover [Abstract] Stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Bill Payments Biller Payments [Member] Bill Payments [Member] Amortization of deferred debt issuance costs Amortization of Debt Issuance Costs United States UNITED STATES Other noncurrent liabilities Other Liabilities, Noncurrent Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Non-NEOs Non-NEOs [Member] Revenue allocated to remaining performance obligations Revenue, Remaining Performance Obligation, Amount Merchants Merchants [Member] Merchants Segment Information Segment Reporting Disclosure [Text Block] Net decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Adjustment to Compensation: Adjustment to Compensation [Axis] Credit Agreement Credit Agreement [Member] Credit agreement. Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Off Balance Sheet Settlement Accounts Off Balance Sheet Settlement Accounts, Policy [Policy Text Block] Disclosure of accounting policy for bank accounts for the benefit of clients that are separate from company assets. Debt Instrument [Line Items] Debt Instrument [Line Items] Basic (in shares) Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Concentration Risk Type [Domain] Concentration Risk Type [Domain] Operating income (loss) Operating Income (Loss) Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Repurchase program, shares repurchased to date (in shares) Treasury Stock, Shares, Acquired, To Date Treasury Stock, Shares, Acquired, To Date 5.750% Senior notes, due August 2026 Senior Notes Five Point Seven Five Percent Due Two Thousand Twenty Six [Member] Senior Notes 5.75% Due 2026. Revenues Revenues [Abstract] Cost of revenue Cost of Revenue Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Schedule of Nonvested Performance Award Activity Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Customer relationships Customer Relationships [Member] Line of credit, carrying amount Long-Term Line of Credit Condensed Financial Statements [Table] Condensed Financial Statements [Table] Software, net Capitalized Computer Software, Net