Proceeds from sales of assets and divested operations Proceeds from Divestiture of Businesses Total accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Cash equivalents included in funds held for clients Cash Equivalents Included In Funds Held For Clients Cash equivalents included in funds held for clients. Summary of Investments Debt Securities, Available-for-Sale [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-in Capital [Member] Tabular List, Table Tabular List [Table Text Block] IDG Acquisition IDG Acquisition [Member] IDG Acquisition Recent Accounting Pronouncements, Accounting Standards Adopted, and Accounting Standards Issued But Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Restricted stock units and awards Restricted Stock or Unit Expense Annual amortization rate, year five Debt Instrument, Annual Principal Amortization Payments Rate, Year Five Debt Instrument, Annual Principal Amortization Payments Rate, Year Five Secured Overnight Financing Rate (SOFR) Secured Overnight Financing Rate (SOFR) [Member] Share-based Payment Arrangement Share-Based Payment Arrangement [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] RELATED PARTIES Related Party Transactions Disclosure [Text Block] Schedule Of Common Stock [Table] Schedule Of Common Stock [Table] Schedule Of Common Stock [Table] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] REVENUE Revenue from Contract with Customer [Text Block] Unrealized loss on interest rate swaps, income tax expense (benefit) Accumulated Other Comprehensive Income Unrealized Holding Gain Loss On Derivatives Arising During Period Tax Accumulated Other Comprehensive Income Unrealized Holding Gain Loss On Derivatives Arising During Period Tax Shares purchased under ESPP Stock Issued During Period, Shares, Employee Stock Purchase Plans Total Current Income Tax Expense (Benefit) Adjustment to Compensation, Amount Adjustment to Compensation Amount Commitments And Contingencies [Table] Commitments And Contingencies [Table] Commitments and contingencies. Other assets Increase (Decrease) in Other Operating Assets Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Notional amount, asset Derivative Asset, Notional Amount Employee Stock Option Share-Based Payment Arrangement, Option [Member] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Notes receivable Financing Receivable, after Allowance for Credit Loss Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total stockholders’ equity Beginning balance Ending balance Total stockholders' equity Equity, Attributable to Parent Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Summary of Property and Equipment, Net Property, Plant and Equipment [Table Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Increase in accrued personnel obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Personnel Obligations Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accrued Personnel Obligations Cover [Abstract] Cover [Abstract] Adjustments, Total liabilities assumed Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liability Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Liability Maximum Maximum [Member] Intangible assets amortization period Finite-Lived Intangible Asset, Useful Life Liability for interest expense Unrecognized Tax Benefits, Interest on Income Taxes Accrued Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Adjustments, Other intangible assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income tax expense Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating Segments [Member] Summary of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Operating lease, remaining lease term Lessee, Operating Lease, Remaining Lease Term Non-deductible officers' compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Officers' Compensation Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Officers' Compensation Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Short-term debt Short-Term Debt [Abstract] Total goodwill and other intangibles assets Intangible Assets Including Goodwill Gross Gross amount of finite-lived intangible assets including goodwill. Net income Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Summary of Changes to the Allowance for Doubtful Accounts on Accounts Receivable Schedule Of Changes In Allowance For Doubtful Accounts Table [Table Text Block] Schedule of changes in allowance for doubtful accounts. Income taxes payable Accrued Income Taxes, Noncurrent United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Summary of Share-Based Compensation Awards Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Lease liability Operating Lease, Liability, Current Capitalized software Capitalized software Software and Software Development Costs [Member] Document Fiscal Period Focus Document Fiscal Period Focus Goodwill and other intangible assets, net Goodwill and other intangible assets, net Intangible Assets, Net (Including Goodwill) Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] Basic earnings per share (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Litigation Case [Domain] Litigation Case [Domain] Furniture and fixtures Furniture and fixtures Furniture and Fixtures [Member] Award Type [Axis] Award Type [Axis] Foreign currency translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Percent of EBITDA Line Of Credit Facility, Accordion Feature, Percent Of EBITDA Line Of Credit Facility, Accordion Feature, Percent Of EBITDA Interest Rate Swap, July 14, 2030 Expiration Interest Rate Swap, July 14, 2030 Expiration [Member] Interest Rate Swap, July 14, 2030 Expiration Share-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Trading Symbol Trading Symbol 2029 Lessee, Operating Lease, Liability, to be Paid, Year Four Business Combinations Business Combination [Policy Text Block] Change in valuation allowances Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Summary of Components of Goodwill and Other Intangible Assets, Net Schedule of Intangible Assets and Goodwill [Table Text Block] Restricted stock units and awards and Performance share units (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Achievement of an earnings per share target Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Percentage Of Target Earnings Per Share Share based compensation arrangement by share based payment award equity instruments other than options percentage of target earnings per share. Business Combination, Contingent Consideration [Table] Business Combination, Contingent Consideration [Table] Entity Address, City or Town Entity Address, City or Town Short-term Debt, Type [Domain] Short-Term Debt, Type [Domain] Total deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total consideration transferred Business Combination, Consideration Transferred Entity Emerging Growth Company Entity Emerging Growth Company Number of monthly installments for remaining shares issuable Business Acquisition, Equity Interest, Number Of Monthly Installments For Remaining Shares Issuable Business Acquisition, Equity Interest, Number Of Monthly Installments For Remaining Shares Issuable Stock options outstanding (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Trade accounts receivable Billed Contracts Receivable Payments of bank debt Repayments of Lines of Credit Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Additions from business acquisitions Additions from business acquisitions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Interest Rate Swap, July 15, 2030 Expiration Interest Rate Swap, July 15, 2030 Expiration [Member] Interest Rate Swap, July 15, 2030 Expiration Contingent shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Common stock, shares, outstanding (in shares) Common Stock, Shares, Outstanding Provision Accounts Receivable, Credit Loss Expense (Reversal) Other depository assets Other Assets, Fair Value Disclosure ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Summary of Disaggregation of Revenue by Source Disaggregation of Revenue [Table Text Block] Contingent purchase price liabilities Contingent Purchase Price Liabilities At Fair Value Contingent purchase price liabilities. Non-qualified deferred income (loss) on investment Non Qualified Deferred Compensation Plan Gain (Loss) On Investments Non Qualified Deferred Compensation Plan Gain (Loss) On Investments Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Net increase in valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Income taxes payable Accrued Income Taxes, Current Stock options exercised Stock Issued During Period, Value, Stock Options Exercised Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Range of blended interest rates Debt Instrument, Interest Rate, Effective Percentage Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Provision for income taxes Provision for income taxes Income Tax Expense (Benefit) Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Net unrealized gain (loss) on interest rate swaps, net of income tax benefit Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Total property and equipment Property, Plant and Equipment, Gross Employer contribution Defined Contribution Plan, Employer Discretionary Contribution Amount Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Goodwill Additions Goodwill, Acquired During Period Proceeds from exercise of stock options Proceeds from Stock Options Exercised Business acquisitions and purchases of client lists, net of cash acquired Cash consideration Payments to Acquire Businesses, Net of Cash Acquired Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Contingent Purchase Price Liabilities Contingent Purchase Price Payable [Member] Contingent purchase price payable. Other, net Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Redemptions Proceeds from Sale of Debt Securities, Available-for-Sale Adjusted total leverage ratio spread Adjusted Total Leverage Ratio, Spread Adjusted Total Leverage Ratio, Spread Property and equipment useful life Property, Plant and Equipment, Useful Life Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Subsequent Event Subsequent Event [Member] Other line of credit Other Line Of Credit [Member] Other Line Of Credit Other current assets Business Combination, Recognized Asset Acquired, Other Asset, Current Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation expense for property and equipment Depreciation Fair value, liability Derivative Liability, Subject to Master Netting Arrangement, before Offset Assets acquired: Business Combination, Recognized Asset Acquired, Asset [Abstract] Equity Components Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of Reportable Segments Number of Reportable Segments Interest rate swaps, net Interest Rate Derivatives, at Fair Value, Net Share repurchase program, past years approved by board Share Repurchase Program, Past Years Approved By Board Share Repurchase Program, Past Years Approved By Board Entity Address, State or Province Entity Address, State or Province Total current liabilities Liabilities, Current Senior leverage ratio Senior Leverage Ratio Senior leverage ratio. Individual: Individual [Axis] Financial service Financial Service [Member] Document Annual Report Document Annual Report Adjustments, Property, and equipment Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Property, Plant, and Equipment Summary of Estimated Useful Lives Property and Equipment Property Plant And Equipment Estimated Useful Lives Table [Table Text Block] Property plant and equipment estimated useful lives. Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Entity Interactive Data Current Entity Interactive Data Current Adjusted Term Secured Overnight Financing Rate (SOFR) Adjusted Term Secured Overnight Financing Rate (SOFR) [Member] Adjusted Term Secured Overnight Financing Rate (SOFR) Deferred revenue Deferred Tax Assets, Deferred Income Adjustments, Lease liabilities (current and non-current) Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Lease Obligation Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Lease Liabilities Scenario One Scenario One [Member] Scenario One Share-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Interest Rate Swap, March 2030 Expiration Interest Rate Swap, March 2030 Expiration [Member] Interest Rate Swap, March 2030 Expiration Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Adjustments for performance results (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Adjustments For Actual Performance Results Weighted Average Grant Date Fair Value Share-based compensation arrangement by share-based payment award, equity instruments other than options, adjustments for performance results, weighted average grant Date fair value. Interest Rate Swap, August 2027 Expiration Interest Rate Swap, August 2027 Expiration [Member] Interest Rate Swap, August 2027 Expiration Other non-current assets Other Assets, Noncurrent Entity Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Comprehensive income: Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Contingent purchase price liability Business Combination, Contingent Consideration, Liability, Noncurrent Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] FINANCIAL INSTRUMENTS Financial Instruments Disclosure [Text Block] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Performance share units (in shares) Incremental Common Shares Attributable To Performance Share Units Incremental Common Shares Attributable To Performance Share Units Class of Stock [Domain] Class of Stock [Domain] Unrecognized compensation cost for restricted stock awards Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Tax at U.S. federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Adjustments, Deferred income taxes, net Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Deferred Tax Assets Subsequent Event Type [Axis] Subsequent Event Type [Axis] Contingent purchase price liability Business Combination, Contingent Consideration, Liability, Current Interest Rate Swap, July 2026 Expiration Interest Rate Swap, July 14 2026 Expiration [Member] Interest Rate Swap, July 14 2026 Expiration Total long-term debt Total long-term debt Long-Term Debt, Excluding Current Maturities Balance Sheet Location [Axis] Statement of Financial Position Location, Balance [Axis] 2028 Finite-Lived Intangible Asset, Expected Amortization, Year Three Share Repurchase Program, Percentage Of Net Income Share Repurchase Program, Percentage Of Net Income Share Repurchase Program, Percentage Of Net Income Restricted stock units and awards Restricted Stock Units And Awards [Member] Restricted Stock Units And Awards Deferred tax assets: Deferred Tax Assets, Net [Abstract] Total intangibles Finite-Lived Intangible Assets, Gross Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Allowance for doubtful accounts Allowance for doubtful accounts Balance at beginning of period Balance at end of period Accounts Receivable, Allowance for Credit Loss, Current Meals and entertainment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Meals and Entertainment, Percent Investments [Domain] Investments [Domain] Indirect repurchase of shares for minimum tax withholding (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Pro forma EBITDA threshold (as a percent) Share Repurchase Program, Percentage Of Pro Forma EBITDA Threshold Share Repurchase Program, Percentage Of Pro Forma EBITDA Threshold Fair Value as of Grant Date Award Grant Date Fair Value Reserves for uncertain tax positions Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Personnel costs Labor and Related Expense Organization Organization Policy [Policy Text Block] Disclosure of accounting policies for organization. Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Purchases of client fund investments Payments to Acquire Investments Total segment expense Costs and Expenses Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Schedule Of Common Stock [Line Items] Schedule Of Common Stock [Line Items] Schedule Of Common Stock [Line Items] Deferred income taxes Deferred Income Taxes and Tax Credits Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] 2027 Lessee, Operating Lease, Liability, to be Paid, Year Two Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Dilutive securities included and antidilutive securities excluded from computation of earnings per share. Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Investment Type [Axis] Investment Type [Axis] Net unrealized gain (loss) on available-for-sale securities, net of income tax expense Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Cash payment amount Payments to Acquire Businesses, Gross Funds Held for Clients and Client Fund Obligations Funds Held For Clients And Client Fund Obligations Policy [Policy Text Block] Disclosure of accounting policies for funds held for clients and client fund obligations. Non-PEO NEO Non-PEO NEO [Member] Letters of credit outstanding Letters of Credit Outstanding, Amount Right of Use assets Deferred Tax Liabilities, Leasing Arrangements Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Notional amount, liability Derivative Liability, Notional Amount Other intangibles Other Intangible Assets [Member] Award Type [Domain] Award Type [Domain] 2026 Lessee, Operating Lease, Liability, to be Paid, Year One Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Lease liabilities (current and non-current) Business Combination, Recognized Liability Assumed, Lease Obligation Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Canada CANADA Compensation Amount Outstanding Recovery Compensation Amount Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Summary of Revenue from External Customers Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Accrued personnel costs Increase (Decrease) in Employee Related Liabilities Current assets before funds held for clients Current Assets Before Funds Held For Clients Current assets before funds held for clients. MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Statutory rate difference between Canada and U.S. Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Deferred income taxes, net Business Combination, Recognized Asset Acquired, Deferred Tax Asset Adjustment to contingent earnout liability, net Increase (decrease) in the fair value of contingent consideration, net Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Gross Goodwill, Gross Cash settlement paid Payments for Previous Acquisition Total gross deferred tax liabilities Deferred Tax Liabilities, Gross Performance share units Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Gain reclassified from AOCI into expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Reduction of goodwill Adjustments, Goodwill Goodwill, Measurement Period Adjustment Buildings and leasehold improvements Buildings And Leasehold Improvements [Member] Buildings and leasehold improvements. Company Selected Measure Name Company Selected Measure Name Commitments And Contingencies [Line Items] Commitments And Contingencies [Line Items] Commitments and contingencies. DEBT AND FINANCING ARRANGEMENTS Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Operating cash flows for operating leases Operating Lease, Payments Deferred tax liabilities: Deferred Tax Liabilities, Net [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Net expense Business Combination Contingent Consideration Liability Other Adjustments Based On Projected Future Results Of Acquisition Business combination contingent consideration liability other adjustments based on projected future results of acquisition. Remaining number of shares issuable (in shares) Business Acquisition, Equity Interest, Remaining Number Of Shares Issuable Business Acquisition, Equity Interest, Remaining Number Of Shares Issuable Foreign Current Foreign Tax Expense (Benefit) Percentage of participating employees contribution, matched 100% (as a percent) Defined Contribution Plan Percentage Of Base Compensation Defined contribution plan percentage of base compensation. Goodwill [Roll Forward] Goodwill [Roll Forward] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Diluted weighted average common shares outstanding (in shares) Diluted weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Share-based compensation arrangement by share-based payment award, remaining contractual terms Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Adjustments, Other current assets Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets, Current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets, Current Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] State and local Current State and Local Tax Expense (Benefit) Adjustments, Other current liabilities Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Current Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liability, Current Document Transition Report Document Transition Report Underlying Securities Award Underlying Securities Amount Scenario Two Scenario Two [Member] Scenario Two Equity Component Equity Component [Domain] Document Period End Date Document Period End Date Bank debt Long-term line of credit Long-Term Line of Credit, Noncurrent INCOME TAXES Income Tax Disclosure [Text Block] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] EARNINGS PER SHARE Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Product and Service [Axis] Product and Service [Axis] Revenue Total revenue Revenue from Contract with Customer, Excluding Assessed Tax MOVEit Customer Data Security Breach Litigation MOVEit Customer Data Security Breach Litigation [Member] MOVEit Customer Data Security Breach Litigation Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Adjustments, Right-of- use asset Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Right-Of- Use Asset Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Right-Of- Use Asset Annual share repurchase limit Share Repurchase Program, Authorized, Amount Charge-offs, net of recoveries Allowance For Doubtful Accounts Receivable Write Offs And Net Of Recoveries Allowance for doubtful accounts receivable write offs and net of recoveries. Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Interest rate swap, fixed interest rate Derivative, Fixed Interest Rate Number of claims filed Loss Contingency, New Claims Filed, Number Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Indirect repurchase of shares for minimum tax withholding Payment, Tax Withholding, Share-Based Payment Arrangement Adjusted Base Rate Adjusted Base Rate [Member] Adjusted Base Rate Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Share Repurchase Program Share Repurchase Program [Domain] Total other comprehensive loss Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Current liabilities: Liabilities, Current [Abstract] Unallocated corporate operating expenses Operating Expenses Level 1 Fair Value, Inputs, Level 1 [Member] Account payable Business Combination, Recognized Liability Assumed, Accounts Payable, Current Related Party Transaction [Table] Related Party Transaction [Table] Diluted (in dollars per share) Earnings Per Share, Diluted Accounts receivable, net Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Dilutive Securities Included And Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Dilutive securities included and antidilutive securities excluded from computation of earnings per share. Treasury stock, shares (in shares) Treasury stock, beginning balance (in shares) Treasury stock, ending balance (in shares) Treasury Stock, Common, Shares State and local Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] Net leverage ratio Debt Instrument, Covenant, Total Net Leverage Ratio, Maximum Debt Instrument, Covenant, Total Net Leverage Ratio, Maximum Auditor Location Auditor Location Gross margin Gross Profit Business Combination, Contingent Consideration [Line Items] Business Combination, Contingent Consideration [Line Items] Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Number of defendants Loss Contingency, Number of Defendants Other Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Percent Cash paid for income taxes, net of income tax refunds Cash paid for income taxes, net of income tax refunds Income Taxes Paid, Net 2027 Finite-Lived Intangible Asset, Expected Amortization, Year Two Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Accrued personnel costs Employee-related Liabilities, Current PROPERTY AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] Total undiscounted lease payments Lessee, Operating Lease, Liability, to be Paid Other Other Interest Expense [Member] Other interest expense. Interest Rate Swap, July 2027 Expiration Interest Rate Swap, July 14, 2027 Expiration [Member] Interest Rate Swap, July 14, 2027 Expiration Expiration Date Trading Arrangement Expiration Date Other liabilities Increase (Decrease) in Other Operating Liabilities Interest Rate Swap, October 2028 Expiration Interest Rate Swap, October 2028 Expiration [Member] Interest Rate Swap, October 2028 Expiration 2030 Finite-Lived Intangible Asset, Expected Amortization, Year Five Amount of related party transaction Related Party Transaction, Amounts of Transaction Changes in client funds obligations Net Increase (Decrease) In Client Funds Obligations Net (decrease) increase in client funds obligations. 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Maximum percentage of a participant's eligible compensation that a participating may elect to contribute, on a tax-deferred annually to the plan (as a percent) Defined Contribution Plan Maximum Employee Contribution Percentage Defined contribution plan maximum employee contribution percentage. Interest Rate Swap, April 2028 Expiration Interest Rate Swap, April 2028 Expiration [Member] Interest Rate Swap, April 2028 Expiration Class of Stock [Axis] Class of Stock [Axis] Net unrealized (loss) gain on interest rate swap, net of income tax benefit of $883 and income tax expense of $685, respectively Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accumulated amortization: Finite-Lived Intangible Assets, Net [Abstract] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other deferred tax liabilities Deferred Tax Liabilities, Other Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets: Reconciliation Of Cash Cash Equivalents And Restricted Cash To Consolidated Balance Sheet [Abstract] Reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets. 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All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Treasury stock, 90,274 and 87,747 shares Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Number of interest rate swaps held Number of Interest Rate Derivatives Held Long-term debt Long-Term Debt, Excluding Current Maturities [Abstract] Change in funds held for clients Increase (Decrease) In Funds Held For Clients Classified As Investing Activities Increase (Decrease) In Funds Held For Clients Classified As Investing Activities Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Basic weighted average common shares outstanding (in shares) Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Summary of Computation of Basic and Diluted Earnings Per Share from Continuing Operations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Subsequent Events [Abstract] Subsequent Events [Abstract] Segment Reporting [Abstract] Segment Reporting [Abstract] Operating expenses Cost of Revenue Debt Disclosure [Abstract] Debt Disclosure [Abstract] Other income (expense): Corporate & other: Nonoperating Income (Expense) [Abstract] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount ESPP allows qualified employees to purchase shares of common stock Employee Stock Purchase Plan Share Purchase Authorized Amount Employee stock purchase plan share purchase maximum authorized amount per employee per year. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock, par or stated value (in dollars per share) Common Stock, Par or Stated Value Per Share Employee benefits and compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Covenant interest coverage ratio, minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Debt Instrument, Covenant, Interest Coverage Ratio, Minimum Corporate And Eliminations Corporate And Eliminations [Member] Corporate And Eliminations Use of Estimates Use of Estimates, Policy [Policy Text Block] SUBSEQUENT EVENTS Subsequent Events [Text Block] Insider Trading Arrangements [Line Items] Number of Shares Performance Share Units Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Covenant leverage ratio, maximum, tranche two Debt Instrument, Covenant, Leverage Ratio, Maximum, Tranche Two Debt Instrument, Covenant, Leverage Ratio, Maximum, Tranche Two Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Other income (expense), net Other Nonoperating Income (Expense) [Member] Non-core Benefits and Insurance Services Non Core Benefits And Insurance Services [Member] Non core benefits and insurance services. Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Additions for tax positions of the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Consolidation Items [Axis] Consolidation Items [Axis] Variable Rate [Axis] Variable Rate [Axis] Change in net present value of contingency Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Change In Net Present Value Of Contingencies Fair value measurement with unobservable inputs reconciliation recurring basis liability change in net present value of contingencies. Summary of Restricted Stock Award Activity Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Fair value at beginning of period Fair value at end of period Available-for-sale debt securities Debt Securities, Available-for-Sale Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member]