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Changes in working capital, net of amounts acquired: Increase (Decrease) in Operating Capital [Abstract] Income taxes payable, net Increase (Decrease) in Income Taxes Payable Trade accounts receivable Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Trade accounts payable Increase (Decrease) in Accounts Payable, Trade Deferred revenue Increase (Decrease) in Deferred Revenue Accrued expenses and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Changes in noncurrent assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of other long-term assets Payments to Acquire Other Productive Assets Proceeds from sale of investment Proceeds from Sale of Equity Method Investments Other, net Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of shares Proceeds from Issuance or Sale of Equity Repurchase of shares Payments for Repurchase of Common Stock Borrowings from revolving credit agreements Proceeds from Lines of Credit Repayments of revolving credit agreements Repayments of Lines of Credit Repayments of long-term debt obligations Repayments of Other Long-term Debt Repayments of capital lease obligations Repayments of Long-term Capital Lease Obligations Net borrowing (repayments of) from short-term debt obligations Proceeds 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Transaction, Value of Consideration Received Other Significant Noncash Transaction, Value of Consideration Received Equity issued in connection with acquisition Stock Issued During Period, Value, Acquisitions Preferred Stock Purchase Rights [Abstract] Preferred Stock Purchase Rights [Abstract] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Employee Stock [Member] Employee Stock [Member] Restricted Stock [Member] Restricted Stock [Member] Performance-based Restricted Stock [Member] Performance-based Restricted Stock [Member] Performance-based Restricted Stock [Member] Time-based restricted stock [Member] Time-based restricted stock [Member] Time-based restricted stock [Member] Stock Option [Member] Equity Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation 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Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Proceeds from Stock Options Exercised Proceeds from Stock Options Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, total period for recognition Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateWeightedAverage ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateWeightedAverage ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateWeightedAverage Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-base compensation arrangement by share-based payment award, FV assumptions, forfeitures Share-base compensation arrangement by share-based payment award, FV assumptions, forfeitures Share-base compensation arrangement by share-based payment award, FV assumptions, forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Share-based compensation arrangments by share-based payment award options grant date fair value Share-based compensation arrangments by share-based payment award, options, grant date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Shares reserved for employee stock purchase plan Shares reserved for employee stock purchase plan Shares reserved for employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock Issued During Period, Shares, Employee Stock Purchase Plans Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased Share-based compensation arrangements by share-based payment award, per share, ESPP grant date fair value Share-based compensation arrangements by share-based payment award, per share, ESPP grant date fair value Share-based compensation arrangements by share-based payment award, per share, ESPP grant date weighted-average fair value Stockholders' Equity Note [Abstract] Schedule of Weighted Average Number of Shares [Table Text Block] Accounting Changes and Error Corrections [Abstract] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Europe [Member] Europe [Member] North America [Member] North America [Member] Asia Pacific [Member] Asia Pacific [Member] Other 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Epay Segment [Member] Epay Segment [Member] Epay Segment. Money Transfer Segment [Member] Money Transfer Segment [Member] Money Transfer Segment. 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[Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Term Loan [Member] Term Loan [Member] Term Loan [Member] Reference rate [Axis] Reference rate [Axis] Reference rate [Axis] Reference Rate [Domain] Reference Rate [Domain] Reference Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Base rate [Member] Base Rate [Member] Sublimit [Axis] Sublimit [Axis] Sublimit [Axis] Sublimit [Domain] Sublimit [Domain] Sublimit [Domain] Letter of Credit [Member] Letter of Credit [Member] Swingline loans [Member] Swingline loans [Member] Swingline loans [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Common Stock [Member] Line of Credit [Member] Line of credit - India [Member] Line of credit - India [Member] Line of credit - India [Member] Capital Lease Obligations [Member] Convertible Debt Issue [Axis] Convertible Debt Issue [Axis] Convertible Debt Issue [Domain] Convertible Debt Issue [Domain] 1.5% Issue [Member] 1.5% Issue [Member] 1.5% Issue [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Convertible, Carrying Amount of Equity Component Debt Instrument, Convertible, Carrying Amount of Equity Component Term Loan, Due 2019 Loans Payable to Bank Revolving Credit Agreements, due 2019 Long-term Line of Credit Line of Credit Facility, Fair Value of Amount Outstanding Line of Credit Facility, Fair Value of Amount Outstanding Convertible Debt Convertible Debt Total Debt Obligations Debt, Long-term and Short-term, Combined Amount Unamortized Debt Issuance Expense Unamortized Debt Issuance Expense Carrying value of debt Debt, net of debt issuance costs Total debt, net of debt issuance costs Long-term Debt, Current Maturities Long-term Debt, Current Maturities Long-term Debt, Excluding Current Maturities Long-term Debt, Excluding Current Maturities Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months Long-term Debt, Maturities, Repayments of Principal in Year Two Long-term Debt, Maturities, Repayments of Principal in Year Two Long-term Debt, Maturities, Repayments of Principal in Year Five Long-term Debt, Maturities, Repayments of Principal in Year Five Long-term Debt, Maturities, Repayments of Principal in Year Three Long-term Debt, Maturities, Repayments of Principal in Year Three Long-term Debt, Maturities, Repayments of Principal in Year Four Long-term Debt, Maturities, Repayments of Principal in Year Four Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Long-term Debt, Weighted Average Interest Rate, at Point in Time 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Unamortized Discount Amortization of Debt Discount (Premium) Amortization of Debt Discount (Premium) Consolidated Total Leverage Ratio Consolidated Total Leverage Ratio Consolidated Total Leverage Ratio Consolidated Fixed Charge Coverage Ratio Consolidated Interest Coverage Ratio Consolidated Interest Coverage Ratio Debt Instrument, Convertible, Effective Interest Rate Debt Instrument, Interest Rate During Period Other debt obligations Other debt obligations Various insignificant debt obligations, mix of short and long-term Debt Instrument, Convertible, Interest Expense Interest Expense, Debt Other debt, current Other debt, current Other debt, current Long-term Debt, Maturities, Repayments of Principal after Year Five Long-term Debt, Maturities, Repayments of Principal after Year Five Income Tax Disclosure [Abstract] Income taxes [Table] Income taxes [Table] Income taxes [Table] Expiration Date [Axis] Expiration Date [Axis] Expiration date [Domain] expiration date [Domain] expiration date [Domain] Expiring in One Year [Member] Expiring in One Year [Member] Expiring in Two Years [Member] Expiring in Two Years [Member] Expiring in Three Years [Member] Expiring in Three Years [Member] Expiring in Four Years [Member] Expiring in Four Years [Member] Expiring in Five Years [Member] Expiring in Five Years [Member] Expiring in More than Five Years [Member] Expiring in More than Five Years [Member] Not Subject to Expiration [Member] Not Subject to Expiration [Member] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] US Federal and Foreign [Member] US Federal and Foreign [Member] State and Local Jurisdiction [Member] State and Local Jurisdiction [Member] UNITED STATES Non-US [Member] Foreign Tax Authority [Member] Legal Entity [Axis] Entity [Domain] Income taxes [Line Items] Income taxes [Line Items] Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract] Income (Loss) before Income Taxes, United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Income before Income Taxes, Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Current Income Tax Expense (Benefit) Current Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit) Income tax expense Income Tax Expense (Benefit) Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Income Tax Expense, Income Tax Reconciliation [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Effective Income Tax Rate Reconciliation, State and Local Income Taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Effective Income tax reconciliation, other permanent differences Income tax reconciliation, other permanent differences Income tax reconciliation, other permanent differences Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Effective Income Tax Reconciliation, Tax Contingencies, Foreign Effective Income Tax Rate Reconciliation, Tax Contingency, Foreign, Amount Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount effective income tax rate reconciliation, global intangible low-taxed income effective income tax rate reconciliation, global intangible low-taxed income effective income tax rate reconciliation, global intangible low-taxed income Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Effective Income Tax Rate Reconciliation, Other Adjustments Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Effective Income Tax Rate, Continuing Operations Effective Income Tax Rate Reconciliation, Percent Components of Deferred Tax Assets and Liabilities [Abstract] Components of Deferred Tax Assets and Liabilities [Abstract] Deferred Tax Assets, Operating Loss Carryforwards Deferred Tax Assets, Operating Loss Carryforwards Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Deferred tax assets, property, plant and equipment Deferred Tax Assets, Property, Plant and Equipment Deferred tax assets, goodwill and intangible assets Deferred Tax Assets, Goodwill and Intangible Assets Deferred tax assets, intercompany notes Deferred tax assets, intercompany notes Deferred tax assets, intercompany notes Deferred tax assets, accrued revenue Deferred tax assets, accrued revenue Deferred tax assets, accrued revenue Deferred Tax Assets, Unrealized Currency Losses Deferred Tax Assets, Unrealized Currency Losses Deferred Tax Assets, Other Deferred Tax Assets, Other Deferred Tax Assets, Gross Deferred Tax Assets, Valuation Allowance Deferred Tax Assets, Net Deferred Tax Assets, Net of Valuation Allowance Deferred Tax Liabilities, Goodwill and Intangible Assets, Intangible Assets Deferred Tax Liabilities, Intangible Assets Deferred Tax Liabilities, Goodwill and Intangible Assets, Goodwill Deferred Tax Liabilities, Goodwill Deferred tax liabilities, accrued expenses Deferred tax liabilities, accrued expenses Deferred tax liabilities, accrued expenses Deferred tax liabilities, intercompany notes Deferred tax liabilities, intercompany notes Deferred tax liabilities, intercompany notes Deferred tax liabilities, accrued interest Deferred tax liabilities, accrued interest Deferred tax liabilities, accrued interest Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs Deferred Tax Liabilities, Deferred Expense, Capitalized Research and Development Costs Deferred Tax Liabilities, Property, Plant and Equipment Deferred Tax Liabilities, Property, Plant and Equipment Deferred tax liabilities, accrued revenue Deferred tax liabilities, accrued revenue Deferred tax liabilities, accrued revenue Deferred Tax Liabilities, Other Deferred Tax Liabilities, Other Deferred Tax Liabilities, Gross Deferred Tax Liabilities, Gross Deferred Tax Liabilities Deferred Tax Liabilities, Net Operating Loss Carryforwards Operating Loss Carryforwards Operating Loss Carryforward, Tax Effected Operating Loss Carryforward, Tax Effected Operating Loss Carryforward, Tax Effected Undistributed earnings of foreign subsidiaries indefinitely reinvested Undistributed earnings of foreign subsidiaries indefinitely reinvested Undistributed earnings of foreign subsidiaries indefinitely reinvested Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized Tax Benefits Period Start Unrecognized Tax Benefits Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Decreases Resulting from Settlements with 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of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Restricted Cash [Abstract] Restrictions on Cash and Cash Equivalents [Table] Restrictions on Cash and Cash Equivalents [Table] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents, Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash held in trust or on behalf of others [Member] Cash held in trust or on behalf of others [Member] Cash held in trust or on behalf of others [Member] Collateral on bank credit arrangements and other [Member] Collateral on bank credit arrangements and other [Member] Collateral on bank credit arrangements and other [Member] Restricted Cash and Cash Equivalents Items [Line Items] Restricted Cash and Cash Equivalents Items [Line Items] Restricted cash Fair Value Measurements [Abstract] Fair Value Measurements. Fair Value, by Balance Sheet Grouping [Table Text Block] Fair Value, by Balance Sheet Grouping [Table Text Block] Statement of Comprehensive Income [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive (income) loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive income attributable to Euronet Worldwide, Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Derivative Instruments and Hedges, Assets [Abstract] DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Selected Quarterly Data [Abstract] Selected Quarterly Data [Abstract] Summary Of Quarterly Financial Information [Table Text Block] Quarterly Financial Information [Table Text Block] ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract] ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES [Abstract] Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block] Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block] Schedule of Accrued Expenses and Other Current Liabilities [Table Text Block] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign Exchange Contract [Member] Foreign Exchange Contract [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer Relationships [Member] Customer Relationships [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Foreign Currency Contract, Asset, Fair Value Disclosure Foreign Currency Contract, Asset, Fair Value Disclosure Foreign Currency Contracts, Liability, Fair Value Disclosure Foreign Currency Contracts, Liability, Fair Value Disclosure Convertible Debt, Fair Value Disclosures Convertible Debt, Fair Value Disclosures Guarantees [Abstract] GUARANTEES Commitments Disclosure [Text Block] Schedule of Goodwill and Aquired Intangible Assets [Table] Schedule of Goodwill [Table] Goodwill [Line Items] Goodwill [Line Items] Share Repurchases [Abstract] Share Repurchases [Abstract] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 2016 Share Repurchase Plan [Member] 2016 Share Repurchase Plan [Member] 2016 Share Repurchase Plan [Member] Share Repurchase Plan [Member] Share Repurchase Plan [Member] Share Repurchase Plan [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired Treasury Stock, Value, Acquired, Cost Method Treasury Stock, Value, Acquired, Cost Method Treasury Stock Acquired, Average Cost Per Share Treasury Stock Acquired, Average Cost Per Share Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased Segment Information [Abstract] Segment Information. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] AUSTRALIA GREECE GREECE UNITED KINGDOM GERMANY POLAND SPAIN NEW ZEALAND NEW ZEALAND ITALY MALAYSIA MALAYSIA FRANCE FRANCE INDIA Segment Reporting Information, by Segment [Axis] Unallocated Amount to Segment, Intersegment Eliminations and Other [Member] Unallocated Amount to Segment, Intersegment Eliminations and Other [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues Revenue, Net Direct operating costs Cost of Goods and Services Sold Salaries and benefits Labor and Related Expense Selling, general and administrative Selling, General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total operating expenses Costs and Expenses Operating income Operating Income (Loss) Interest income Investment Income, Interest Interest expense Interest Expense Income from unconsolidated affiliates Foreign currency exchange (loss) gain, net Foreign Currency Transaction Gain (Loss), before Tax Other gains Other Nonoperating Income (Expense) Other expense, net Nonoperating Income (Expense) Income before income taxes Property and Equipment, net Property, Plant and Equipment, Net Total Assets Assets Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Inventory - PINs and other Inventory, Net Trade accounts receivable, net of allowances for doubtful accounts of $24,287 at December 31, 2018 and $20,958 at December 31, 2017 Accounts Receivable, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net of accumulated depreciation of $373,180 at December 31, 2018 and $340,128 at December 31, 2017 Goodwill Goodwill Acquired intangible assets, net of accumulated amortization of $190,920 at December 31, 2018 and $179,142 at December 31, 2017 Finite-Lived Intangible Assets, Net Other assets, net of accumulated amortization of $50,821 at December 31, 2018 and $44,469 at December 31, 2017 Other Assets, Noncurrent Total assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Trade accounts payable Accounts Payable, Trade, Current Accrued expenses and other current liabilities Accrued Expenses And Other Current Liabilities Accrued expenses and other current liabilities. Current portion of capital lease obligations Capital Lease Obligations, Current Short-term debt obligations and current maturities of long-term debt obligations Debt, Current Income taxes payable Accrued Income Taxes, Current Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Debt obligations, net of current portion Capital lease obligations, net of current portion Capital Lease Obligations, Noncurrent Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Euronet Worldwide, Inc. stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred Stock, $0.02 par value. 10,000,000 shares authorized; none issued Preferred Stock, Value, Issued Common Stock, $0.02 par value. 90,000,000 shares authorized; 59,897,309 issued at December 31, 2018 and 58,892,744 issued at December 31, 2017 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Treasury stock, at cost, 8,077,311 shares at December 31, 2018 and 6,084,586 shares at December 31, 2017 Treasury Stock, Value Retained earnings (Accumulated deficit) Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total Euronet Worldwide, Inc. stockholders' equity Stockholders' Equity Attributable to Parent Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Goodwill and Intangible Assets Disclosure [Abstract] GOODWILL AND ACQUIRED INTANGIBLE ASSETS, NET Goodwill and Intangible Assets Disclosure [Text Block] Leases [Abstract] Leases of Lessee Disclosure [Text Block] Leases of Lessee Disclosure [Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Rontec Ltd. [Member] Rontec Ltd. [Member] Rontec Ltd. [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Related party transaction, expenses from transactions with related party Related Party Transaction, Expenses from Transactions with Related Party INCOME TAXES Income Tax Disclosure [Text Block] PROPERTY AND EQUIPMENT, NET [Abstract] PROPERTY AND EQUIPMENT, NET [Abstract] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment [Table Text Block] Income Statement [Abstract] Operating expenses: Costs and Expenses [Abstract] Total operating expenses Operating income Other income (expense): Nonoperating Income (Expense) [Abstract] (Loss) income from unconsolidated affiliates Other gains, net Other expense, net Income tax expense Less: Net (income) loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to Euronet Worldwide, Inc. Net Income (Loss) Attributable to Parent Earnings per share attributable to Euronet Worldwide, Inc. stockholders - basic Earnings Per Share, Basic Earnings per share attributable to Euronet Worldwide, Inc. stockholders - diluted Earnings Per Share, Diluted Weighted average shares outstanding - basic Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding - diluted Weighted Average Number of Shares Outstanding, Diluted Acquisitions [Abstract] Acquisitions [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] YourCash [Member] YourCash [Member] YourCash [Member] XE [Member] XE [Member] XE [Member] IME [Member] IME [Member] IME [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Segment Reporting [Abstract] SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Accrued expenses, current Accrued Liabilities, Current Accrued amounts due to mobile operators and other content providers Accrued amounts due to mobile operators Accrued amounts due to mobile operators and other content providers Money transfer settlement obligations Settlement Liabilities, Current Derivative Liability, Current Derivative Liability, Current Accrued expenses and other current liabilities Restricted Assets Disclosure [Text Block] Restricted Assets Disclosure [Text Block] Legal Entity [Axis] Entity [Domain] Land and buildings [Member] Land and Building [Member] Property, Plant and Equipment, Gross Property, Plant and Equipment, Gross Property and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and Equipment, net Depreciation, Depletion and Amortization Depreciation Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] Business Operations [Axis] Business Operations [Axis] Division [Axis] Business Operations [Domain] Business Operations [Domain] [Domain] for Division [Axis] Ria Operations [Member] Ria Operations [Member] Ria Operations [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Foreign Currency Gain (Loss) [Member] Foreign Currency Gain (Loss) [Member] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Acquisitions Business Combination Disclosure [Text Block] Revenues (quarterly) Operating income (loss) (quarterly) Net income (loss) Net income attributable to Euronet Worldwide, Inc. (quarterly) Earnings (loss) per share, basic (quarterly) Earnings (loss) per share, diluted (quarterly) Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Allowance for doubtful accounts receivable, period start Allowance for Doubtful Accounts Receivable, Current Additions-charged to expense Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Amounts written off Valuation Allowances and Reserves, Deductions Other (primarily changes in foreign currency exchange rates) Valuation Allowances and Reserves, Additions for Adjustments Allowance for doubtful accounts receivable, period end DEBT OBLIGATIONS Debt Disclosure [Text Block] Schedule of Finite-Lived Intangible Assets by Major Class [Table] Schedule of Finite-Lived Intangible Assets [Table] Noncompete Agreements [Member] Noncompete Agreements [Member] Trademarks and Trade Names [Member] Trademarks and Trade Names [Member] Computer Software, Intangible Asset [Member] Computer Software, Intangible Asset [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Useful Life Finite-Lived Intangible Asset, Useful Life Schedule of Capital Leased Asssets [Table Text Block] Schedule of Capital Leased Assets [Table Text Block] Future minimum lease payments for operating and capital leases [Table Text Block] Future minimum lease payments for operating and capital leases [Table Text Block] Future minimum lease payments for operating and capital leases [Table Text Block] Other Liabilities Disclosure [Text Block] Other Liabilities Disclosure [Text Block] Trade Names [Member] Trade Names [Member] Software Development [Member] Software Development [Member] Customer-Related Intangible Assets [Member] Customer-Related Intangible Assets [Member] Business Acquisition, Effective Date of Acquisition Business Acquisition, Effective Date of Acquisition Number of ATMs in operation at acquired entity Number of ATMs in operation at acquired entity Number of ATMs in operation at acquired entity Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash Business Acquisition, Purchase Price Allocation, Deferred Income Taxes, Asset (Liability), Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent Business Acquisition, Cost of Acquired Entity, Cash Paid Payments to Acquire Businesses, Gross Escrow Deposit Escrow Deposit Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Business Combination, Recognized Identifiable Assets Acquire and Liabilities Assumed, Short-term Borrowings Business Combination, Recognized Identifiable Assets Acquire and Liabilities Assumed, Short-term Borrowings Business Combination, Recognized Identifiable Assets Acquire and Liabilities Assumed, Short-term Borrowings Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Settlement Obligations and Customer Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Settlement Obligations and Customer Deposits Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Settlement Obligations and Customer Deposit Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Equipment Business Combination Deferred Consideration Business Combination Deferred Consideration Business Combination Deferred Consideration Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles Contingencies [Abstract] Contingencies. Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingencies by Nature of Contingency [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Quarterly Financial Information [Text Block] Quarterly Financial Information [Text Block] COMPUTER SOFTWARE TO BE SOLD [Abstract] COMPUTER SOFTWARE TO BE SOLD [Abstract] Schedule of Capitalized Software Development Costs [Table] Schedule of Capitalized Software Development Costs [Table] Schedule of Capitalized Software Development Costs [Table] Capitalized software development [Axis] Capitalized software development [Axis] Capitalized software development [Axis] Capitalized software development [Domain] Capitalized software development [Domain] Capitalized software development [Domain] Capitalized software development [Line Items] Capitalized software development [Line Items] Capitalized software development [Line Items] Movement in Capitalized Computer Software, Net [Roll Forward] Movement in Capitalized Computer Software, Net [Roll Forward] Goodwill and Acquired Intangible Assets Net [Abstract] Goodwill And Acquired Intangible Assets, Net. epay US [Member] epay US [Member] epay US [Member] epay UK [Member] epay UK [Member] epay UK [Member] epay Middle East [Member] epay Middle East [Member] epay Middle East [Member] Pure Commerce South Korea [Member] Pure Commerce South Korea [Member] Pure Commerce South Korea [Member] Finite-Lived Customer Relationships, Gross Finite-Lived Customer Relationships, Gross Finite lived trademarks and trade names Finite lived trademarks and trade names, Gross Finite lived trademarks and trade names, Gross Finite-Lived Computer Software, Gross Capitalized Computer Software, Gross Finite-Lived Noncompete Agreements, Gross Finite-Lived Noncompete Agreements, Gross Finite-Lived Intangible Assets, Gross Finite-Lived Intangible Assets, Gross Acquired intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Future Amortization Expense, Year One Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Future Amortization Expense, Year Two Finite-Lived Intangible Assets, Amortization Expense, Year Two Future Amortization Expense, Year Three Finite-Lived Intangible Assets, Amortization Expense, Year Three Future Amortization Expense, Year Four Finite-Lived Intangible Assets, Amortization Expense, Year Four Future Amortization Expense, Year Five Finite-Lived Intangible Assets, Amortization Expense, Year Five Goodwill and Finite-lived Intangible Assets Rollforward [Roll Forward] Goodwill and Finite-lived Intangible Assets Rollforward [Roll Forward] Finite-Lived Intangible Assets, Net Finite-lived intangible assets acquired during period Finite-lived intangible assets acquired during period Finite-lived intangible assets acquired during period Finite-Lived Intangible Assets, Amortization Expense Amortization of Intangible Assets Finite-lived intangible assets, other changes Finite-lived intangible assets, other changes Finite-lived intangible assets, other changes (primarily changes in foreign currency exchange rates) Goodwill, Acquired During Period Goodwill, Acquired During Period Goodwill, Impairment Loss Goodwill and Intangible Asset Impairment Goodwill, Other Changes Goodwill, Other Increase (Decrease) Total intangible assets, net, including goodwill Total intangible assets, net, including goodwill Total intangible assets, net, including goodwill Total intangible assets acquired during period Total intangible assets acquired during period Total intangible assets acquired during period Impairment of Intangible Assets, Finite-lived Total intangible assets amortization expense Total intangible assets amortization expense Total intangible assets amortization expense Total intangible assets, other changes Total intangible assets, other changes Total intangible assets, including goodwill, other changes (primarily changes in foreign currency exchange rates) Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Operating Loss Carryforwards [Table Text Block] Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] Summary of Income Tax Examinations [Table Text Block] Summary of Income Tax Examinations [Table Text Block] Consolidated Statements of Changes in Equity [Abstract] Consolidated Statements of Changes in Equity [Abstract] Statement, Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Treasury Stock [Member] Treasury Stock [Member] Retained Earnings [Member] Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) [Member] AOCI Attributable to Parent [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Total Euronet Worldwide, Inc stockholders' equity Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Treasury Stock, Shares, Acquired Shares issued in connection with acquisition Stock Issued During Period, Shares, Other Stock Issued During Period, Shares, Other No. of Shares Outstanding Period End Common Stock, Shares, Outstanding No. of Shares Outstanding Period End Net income attributable to Euronet Worldwide, Inc. Stock issued under employee stock plans, value Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Net income (loss) attributable to noncontrolling interests Stock Issued During Period, Value, Acquisitions Other Comprehensive Income (Loss) Other Comprehensive Income (Loss), Net of Tax Repurchase of shares Stockholders' Equity, Other Stockholders' Equity, Other Total Euronet Worldwide, Inc stockholders' equity Restrictions on Cash and Cash Equivalents [Table Text Block] Restrictions on Cash and Cash Equivalents [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Entity [Abstract] Entity [Abstract] Entities [Table] Entities [Table] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Earnings Per Share [Abstract] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Weighted average number diluted shares outstanding adjustment Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average shares outstanding - diluted Antidilutive securities excluded from computation of earnings per share, amount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Valuation and Qualifying Accounts Disclosure [Table Text Block] Schedule of Valuation and Qualifying Accounts Disclosure [Table Text Block] Schedule of Valuation and Qualifying Accounts Disclosure [Table Text Block] Preferred Stock [Abstract] Preferred Stock [Abstract] Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Disclosure [Text Block] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Schedule of Long-term Debt Instruments [Table Text Block] Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] Balance Sheet Parenthetical [Abstract] Balance Sheet Parenthetical [Abstract] Allowance for doubtful accounts receivable Property and equipment, accumulated depreciation Acquired intangible assets, accumulated amortization Other assets, accumulated amortization Accumulated amortization on other assets Accumulated amortization on other assets. Preferred stock, par value per share Preferred Stock, Par or Stated Value Per Share Common stock, par value per share Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares, issued Common Stock, Shares, Issued Treasury stock, shares Treasury Stock, Shares Related Party Transactions Disclosure [Text Block] Related Party Transactions Disclosure [Text Block] Derivative Instruments and Hedging Activities Disclosure Fair Value [Abstract] Derivative Instruments and Hedging Activities Disclosure Fair Value [Abstract] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Position [Axis] Position [Axis] Position [Domain] Position [Domain] Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Financial Instruments Owned and Pledged as Collateral by Type [Axis] Financial Instruments Owned and Pledged as Collateral, Type [Domain] Cash and Cash Equivalents [Member] Guarantor Obligations by Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Guarantee Type, Various ATM Cash [Member] Guarantee Type, Various ATM Cash [Member] Guarantee Type, Various ATM Cash [Member] Performance Guarantee [Member] Performance Guarantee [Member] Indemnification Agreement [Member] Indemnification Agreement [Member] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Pledged Assets, Not Separately Reported, Other Pledged Assets, Not Separately Reported, Other Guarantor Obligations, Maximum Exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of Leased Asssets [Table] Schedule of Capital Leased Assets [Table] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Axis] Property Subject to or Available for Operating Lease [Domain] Property Subject to or Available for Operating Lease [Domain] Property Subject to Operating Lease [Member] Property Subject to Operating Lease [Member] Capital Lease Obligations [Member] Major asset class of leased assets [Axis] Major asset class of leased assets [Axis] Major asset class of leased assets [Domain] Major asset class of leased assets [Domain] Major asset class of leased assets [Domain] Other leased assets [Member] Other leased assets [Member] Leased Assets [Line Items] Capital Leased Assets [Line Items] Lease Expiration Date Lease Expiration Date Debt Instrument, Interest Rate, Stated Percentage Capital Leased Assets, Gross Capital Leased Assets, Gross Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net Capital Leases, Lessee Balance Sheet, Assets by Major Class, Other Property, Plant, and Equipment, Net Capital Lease Obligations Incurred Capital Lease Obligations Incurred Operating Leases, Rent Expense Operating Leases, Rent Expense Capital Leases, Future Minimum Payments Due, Current Capital Leases, Future Minimum Payments Due, Next Twelve Months Capital Leases, Future Minimum Payments Due in Two Years Capital Leases, Future Minimum Payments Due in Two Years Capital Leases, Future Minimum Payments Due in Three Years Capital Leases, Future Minimum Payments Due in Three Years Capital Leases, Future Minimum Payments Due in Four Years Capital Leases, Future Minimum Payments Due in Four Years Capital Leases, Future Minimum Payments Due in Five Years Capital Leases, Future Minimum Payments Due in Five Years Capital Leases, Future Minimum Payments Due Thereafter Capital Leases, Future Minimum Payments Due Thereafter Capital Leases, Future Minimum Payments Due Capital Leases, Future Minimum Payments Due Capital Leases, Future Minimum Payments, Interest Included in Payments Capital Leases, Future Minimum Payments, Interest Included in Payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Capital Lease Obligations, Current Capital Lease Obligations, Noncurrent Operating Leases, Future Minimum Payments Due, Current Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES Significant Accounting Policies [Text Block] Schedule of Revenues by Segment by Region [Table Text Block] Schedule of Revenues by Segment by Region [Table Text Block] [Table Text Block] for Schedule of Revenues by Segment by Region [Table] Derivative Instruments Financial Information [Abstract] Derivative Instruments Financial Information [Abstract] Derivative Instruments and Hedging Activities Disclosures [Table] Derivative Instruments and Hedging Activities Disclosures [Table] Corporate Operations [Member] Corporate Operations [Member] Corporate Operations [Member] HiFX Operations [Member] HiFX Operations [Member] HiFX Operations [Member] [Member] Trading Revenue [Member] Trading Revenue [Member] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Instruments and Hedging Activities Disclosures [Line Items] Derivative Liability, Fair Value, Gross Liability Derivative Liability, Fair Value, Gross Liability Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Liability Derivative Asset, Fair Value, Gross Liability Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Asset, Fair Value, Amount Not Offset Against Collateral Derivative Asset, Not Offset, Policy Election Deduction Derivative Asset, Not Offset, Policy Election Deduction Derivative, Collateral, Obligation to Return Cash Derivative, Collateral, Obligation to Return Cash Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative, Notional Amount Derivative, Notional Amount Trading Activity, Gain Trading Activity, Gain Foreign currency forward contract term Foreign currency forward contract term Foreign currency forward contract term, in days Derivative Liability, Fair Value, Gross Asset Derivative Liability, Fair Value, Gross Asset Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative Liability, Fair Value, Amount Not Offset Against Collateral Derivative Liability, Not Offset, Policy Election Deduction Derivative Liability, Not Offset, Policy Election Deduction Derivative, Collateral, Right to Reclaim Cash Derivative, Collateral, Right to Reclaim Cash Derivative Liability, Fair Value, Amount Offset Against Collateral Derivative Liability, Fair Value, Amount Offset Against Collateral