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Includes current and non-current portions. 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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Includes aggregate carrying amount, as of the balance sheet date, of current obligations not separately disclosed in the balance sheet due to materiality considerations. Current liabilities are expected to be paid within one year (or the normal operating cycle, if longer). Organization Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Income tax provision Income Tax Expense (Benefit) Other comprehensive (loss) income before reclassifications, net of tax effects Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent Before Reclassifications Net of tax amount of other comprehensive income (loss) attributable to the parent entity before reclassifications into income. Total cash, cash equivalents and restricted cash in the statement of cash flows Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Annual Maturities Related to Credit Facility Schedule of Maturities of Long-term Debt [Table Text Block] Accrued bonuses Accrued Bonuses Effect of exchange rate on cash, cash equivalents and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Total financial liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Diluted earnings per share Earnings Per Share, Diluted Long-term Purchase Commitment [Table] Long-term Purchase Commitment [Table] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Total accrued expenses and other liabilities Accrued Liabilities and Other Liabilities Aggregate principal amount assumed Debt, gross Long-term Debt, Gross Summary of Debt Schedule of Long-term Debt Instruments [Table Text Block] Implementation costs for cloud computing arrangements, accumulated amortization Hosting Arrangement, Service Contract, Implementation Cost, Capitalized, Accumulated Amortization Depreciation Depreciation Total deferred revenue Contract with Customer, Liability Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Deferred taxes Deferred Income Tax Expense (Benefit) Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Award Type [Axis] Award Type [Axis] Total prepaid expenses and other assets Prepaid Expense and Other Assets Maximum [Member] Maximum [Member] Security exchange name Security Exchange Name Fed funds effective rate overnight index swap rate [Member] Fed Funds Effective Rate Overnight Index Swap Rate [Member] Preferred stock, shares authorized Preferred Stock, Shares Authorized Restricted cash due to customers Restricted Cash Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Unrecognized tax benefit Unrecognized Tax Benefit, Current and Long-term Liability for uncertain tax positions as of the balance sheet date. Includes current and non-current portions. Retained earnings [Member] Retained Earnings [Member] Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Balance at beginning of year Balance at period end Accounts Receivable, Allowance for Credit Loss Award Type [Domain] Award Type [Domain] Document transition report Document Transition Report Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Treasury stock, at cost; 11,337,486 and 11,066,354 shares at September 30, 2020 and December 31, 2019, respectively Treasury Stock, Value Earnings Per Share Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current liabilities: Liabilities, Current [Abstract] Fair value measurements, recurring [Member] Fair Value, Recurring [Member] One-time bonus to employees Payments to Employees Reportable segment Segment Reporting, Policy [Policy Text Block] Proceeds from lines of credit Proceeds from Lines of Credit Recently adopted accounting pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Net leverage ratio Net Leverage Ratio Net Leverage Ratio