Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative [Table] Derivative [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Swaps Swap [Member] Futures, forwards and spot Foreign Exchange Forward [Member] Written options Written Foreign Exchange Option [Member] Written Foreign Exchange Option [Member] Purchased options Purchased Foreign Exchange Option [Member] Purchased Foreign Exchange Option [Member] Derivative [Line Items] Derivative [Line Items] Total Derivative, Notional Amount Statement of Stockholders' Equity [Abstract] Other comprehensive loss, tax Other Comprehensive Income (Loss), Tax Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] North America North America [Member] International International [Member] International. Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenues, net Revenue, Net Operating income: Operating Income (Loss) Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Capital expenditures: Payments to Acquire Property, Plant, and Equipment Long-lived assets (excluding goodwill): Long-Lived Assets Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Period One Debt Instrument, Redemption, Period One [Member] Period Two Debt Instrument, Redemption, Period Two [Member] Period Three Debt Instrument, Redemption, Period Three [Member] Period Four Debt Instrument, Redemption, Period Four [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Term Loan A Term Loan A [Member] Term loan a. Term Loan B Term Loan B [Member] Term loan b. Revolving A Credit Facility Revolving A Credit Facility [Member] Revolving A Credit Facility [Member] Revolving B Credit Facility Revolving B Credit Facility [Member] Revolving B Credit Facility [Member] Revolving C Credit Facility Revolving C Credit Facility [Member] Revolving C Credit Facility [Member] Swing Line Swing Line [Member] Swing Line Domestic Line of Credit Domestic Line of Credit [Member] Foreign Revolving Line of Credit Facility A Foreign Revolving Line Of Credit Facility B [Member] Foreign revolving line of credit facility B Foreign Swing Line Foreign Swing Line [Member] Foreign swing line. Term Loan Term Loan [Member] Term loan. Second Amendment Second Amendment [Member] Second Amendment [Member] Commercial Paper Commercial Paper [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Secured Debt Secured Debt [Member] Domestic Revolving Credit Facility Domestic Revolving Credit Facility [Member] Domestic Revolving Credit Facility [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Securitization Facility Receivables Securitization Facility [Member] Receivables Securitization Facility [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Federal Funds Rate Plus Federal Funds Rate Plus [Member] Federal Funds Rate Plus [Member] Eurodollar Eurodollar [Member] Base Rate Base Rate [Member] London Interbank Offered Rate (LIBOR) London Interbank Offered Rate (LIBOR) [Member] Blended Rate Of LIBOR And Commercial Paper Rates Based On Weighted Average Advance Blended Rate Of LIBOR And Commercial Paper Rates Based On Weighted Average Advance [Member] Blended Rate Of LIBOR And Commercial Paper Rates Based On Weighted Average Advance [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Term notes payable-domestic, net of discounts Notes Payable Revolving line of credit Long-term Line of Credit Other debt Other Long-term Debt, Noncurrent Total notes payable and other obligations Notes and Loans Payable Securitization facility Secured Debt, Current Total notes payable, credit agreements and Securitization Facility Long-term Debt, Gross Current portion Long-term Debt, Current Maturities Long-term portion Notes and Loans, Noncurrent Securitized accounts receivable facility Line of Credit Facility, Maximum Borrowing Capacity Debt instrument, basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Line of credit facility additional available borrowing capacity Line Of Credit Facility Additional Available Borrowing Capacity Line Of Credit Facility Additional Available Borrowing Capacity Interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Line of credit facility, unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Payment period Line Of Credit Facility, Payment Period Line Of Credit Facility, Payment Period Line of credit facility, interest rate during period Line of Credit Facility, Interest Rate During Period Debt instrument, maturity date Debt Instrument, Maturity Date Unamortized discount Debt Instrument, Unamortized Discount Interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Annual principal payment Debt Instrument, Annual Principal Payment Description of variable rate basis Debt Instrument, Description of Variable Rate Basis Line of credit facility, commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Amortization of debt issuance costs Amortization of Debt Issuance Costs Capitalized debt issuance costs Debt Issuance Costs, Net Goodwill and Intangible Assets Disclosure [Abstract] Goodwill deductible for income tax purposes Goodwill Deductible For Income Tax Purposes Goodwill deductible for income tax purposes. Impact of foreign exchange rates on intangible assets Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) Amortization expense of intangible assets Amortization of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] NexTraq NexTraq [Member] NexTraq [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Disposal group, intangible assets Disposal Group, Including Discontinued Operation, Intangible Assets Schedule of Goodwill [Table] Schedule of Goodwill [Table] International Goodwill [Line Items] Goodwill [Line Items] Goodwill [Roll Forward] Goodwill [Roll Forward] Beginning Balance of Goodwill Goodwill Acquisitions Goodwill, Acquired During Period Dispositions Goodwill, Written off Related to Sale of Business Unit Acquisition Accounting Adjustments Goodwill, Purchase Accounting Adjustments Foreign Currency Goodwill, Foreign Currency Translation Gain (Loss) Ending Balance of Goodwill Leases [Abstract] 2018 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2019 Operating Leases, Future Minimum Payments, Due in Two Years 2020 Operating Leases, Future Minimum Payments, Due in Three Years 2021 Operating Leases, Future Minimum Payments, Due in Four Years 2022 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Document And Entity Information [Abstract] Document and entity information. Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol 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 Well-know Seasoned Issuer Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Earnings Per Share [Abstract] Net income Net Income (Loss) Attributable to Parent Denominator for basic earnings per share (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Denominator for diluted earnings per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic earnings per share (in usd per share) Earnings Per Share, Basic Diluted earnings per share (in usd per share) Earnings Per Share, Diluted Payables and Accruals [Abstract] Accrued bonuses Accrued Bonuses, Current Accrued payroll and severance Accrued Salaries, Current Accrued taxes Accrued Income Taxes, Current Accrued commissions/rebates Accrued Sales Commission And Rebates Accrued Sales Commission And Rebates Other Other Accrued Liabilities, Current Total Accrued Liabilities, Current Income Tax Disclosure [Abstract] Income Before The Provision for Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Summary of Provision for Income Taxes and U.S. Federal Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Summary of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Deferred Tax Balance Classification in Balance Sheet Deferred Tax Assets And Liabilities Net Classification Table [Table Text Block] Tabular disclosure of the net deferred tax asset or liability recognized in an entity's statement of financial position by current or noncurrent. Summary of Valuation Allowance Summary of Valuation Allowance [Table Text Block] Reconciliation of Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Segments Segment Reporting Disclosure [Text Block] Derivative assets Derivative Asset Derivative liabilities Derivative Liability Effective Income Tax Rate Reconciliation, Amount [Abstract] Effective Income Tax Rate Reconciliation, Amount [Abstract] Computed “expected” tax expense Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Foreign income tax differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount State taxes net of federal benefits Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Foreign-sourced nontaxable income Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount IRC Section 199 deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Excess tax benefits related to stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Subpart F income/transition tax - federal only Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Foreign tax credit/transition tax - federal only Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount Tax reform - federal rate reduction Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Total provision Income Tax Expense (Benefit) Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent [Abstract] Effective Income Tax Rate Reconciliation, Other Reconciling Items, Percent [Abstract] Computed "expected" tax expense, rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Change in valuation allowance, rate Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Foreign income tax differential, rate Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent State taxes net of federal benefits, rate Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Foreign-sourced nontaxable income, rate Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent IRC Section 199 deduction, rate Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Percent Excess tax benefits related to stock-based compensation, rate Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent Subpart F income/transition tax - federal only, rate Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent Foreign tax credit/transition tax - federal only, rate Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent Tax reform - federal rate reduction, rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Other, rate Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Provision for income taxes, rate Effective Income Tax Rate Reconciliation, Percent Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock Common Stock [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Repurchase agreements Repurchase Agreements [Member] Class of Stock [Line Items] Class of Stock [Line Items] Repurchase of common stock Treasury Stock, Value, Acquired, Cost Method Stock repurchase program, period in force Stock Repurchase Program, Period in Force Increase in authorized amount of repurchases Stock Repurchase Program, Increase In Authorized Amount Stock Repurchase Program, Increase In Authorized Amount Extension of original period Stock Repurchase Program, Period In Force, Extension Of Original Period Stock Repurchase Program, Period In Force, Extension Of Original Period Aggregate authorized repurchase amount Stock Repurchase Program, Authorized Amount Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Repurchase of common stock Payments for Repurchase of Common Stock Shares acquired (in shares) Treasury Stock, Shares, Acquired Initial price paid (in usd per share) Accelerated Share Repurchases, Initial Price Paid Per Share Final price paid (in usd per share) Accelerated Share Repurchases, Final Price Paid Per Share Number of transactions Accelerated Share Repurchases, Number Of Transactions Accelerated Share Repurchases, Number Of Transactions Leases Leases of Lessee Disclosure [Text Block] Schedule of Company's Segment Results Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Revenues and Long-Lived Assets by Geographical Area Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Revenue from External Customers by Products and Services Revenue from External Customers by Products and Services [Table Text Block] Summary of Debt Instruments Schedule of Debt [Table Text Block] Summary of Contractual Maturities of Notes Payable and Other Obligations Schedule of Maturities of Long-term Debt [Table Text Block] Unrecognized Income Tax Benefit [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Beginning balance, unrecognized tax benefits Unrecognized Tax Benefits Additions based on tax provisions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for tax positions due to acquisitions Unrecognized Tax Benefits, Increase Resulting from Acquisition Additions based on tax provisions related to the prior year Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Deductions based on settlement/expiration of prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Ending balance, unrecognized tax benefits Statement of Financial Position [Abstract] Accounts receivable, allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Par value (in usd per share) Common Stock, Par or Stated Value Per Share Shares authorized (in shares) Common Stock, Shares Authorized Shares issued (in shares) Common Stock, Shares, Issued Shares outstanding (in shares) Common Stock, Shares, Outstanding Treasury stock, shares Treasury Stock, Shares Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Fair Value Disclosures [Abstract] Financial Assets and Liabilities Measured at Fair Value Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] 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] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted stock Restricted Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2010 Equity Compensation Plan Two Thousand Ten Equity Compensation Plan [Member] Two thousand ten equity compensation plan. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares authorized to issue grants (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Increase in authorized number of shares of common stock (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Tax benefits recorded on stock based compensation Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Aggregate intrinsic value of options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Weighted average remaining contractual term of options exercisable (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted-average remaining contractual life for options outstanding (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Shares, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Income Statement [Abstract] Expenses: Costs and Expenses [Abstract] Merchant commissions Sales Commissions and Fees Processing Processing Expenses Expenses recognized in the period related to processing transactions, servicing our customers and merchants and bad debt expense. Selling Selling Expense General and administrative General and Administrative Expense Other operating, net Other Operating Income (Expense), Net Operating income Investment loss Income (Loss) from Equity Method Investments Other (income) expense, net Other Nonoperating Income (Expense) Interest expense, net Interest Income (Expense), Net Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Total other (income) expense Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Net income Earnings per share: Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic weighted average shares outstanding (in shares) Diluted weighted average shares outstanding (in shares) Stock options Employee Stock Option [Member] Unrecognized Compensation Cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted Average Period of Expense Recognition (in Years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Business Combinations [Abstract] Summary of Acquisition Accounting Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of Final Estimated Fair Value of Intangible Assets Acquired and the Related Estimated Useful Lives Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [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 [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Performance Shares Performance Shares [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Diluted earnings per share excludes antidilutive effect (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Summary of Expense Related to Share-Based Payments Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Summary of Total Unrecognized Compensation Cost Related to Stock-Based Compensation Schedule of Unrecognized Compensation Cost, Nonvested Awards [Table Text Block] Summary of Changes in Number of Shares of Common Stock Under Option Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Stock Options Exercise Price Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Schedule of Weighted-Average Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Summary of Changes in Number of Shares of Restricted Stock and Restricted Stock Units Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Property Plant and Equipment Useful Life and Values [Abstract] Property Plant and Equipment Useful Life and Values [Abstract] Depreciation Depreciation Capitalized computer software amortization expense Capitalized Computer Software, Amortization Unamortized computer software costs Capitalized Computer Software, Net Income Taxes Income Tax Disclosure [Text Block] Quarterly Financial Information Disclosure [Abstract] Accounting Policies [Abstract] Description of Business Business Description and Basis of Presentation [Text Block] 2018 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Fuel Fuel Cards [Member] Fuel Cards [Member] Corporate payments Corporate Payments [Member] Corporate Payments [Member] Tolls Tolls [Member] Tolls [Member] Lodging Lodging [Member] Lodging [Member] Gift Gift [Member] Gift [Member] Other Other [Member] Other [Member] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Additional Paid-In Capital Additional Paid-in Capital [Member] Retained Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Treasury Stock Treasury Stock [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Stockholders' Equity Attributable to Parent Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Acquisition of common stock Issuance of common stock Stock Issued During Period, Value, New Issues Ending Balance Statement of Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation gains (losses), net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Reclassification of foreign currency translation loss to investment, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax Total other comprehensive income (loss) Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Summary of Changes in Goodwill by Reportable Business Segment Schedule of Goodwill [Table Text Block] Schedule of Other Intangible Assets Schedule Of Intangible Assets Excluding Goodwill [Table Text Block] Schedule Of Intangible Assets Excluding Goodwill Schedule of Future Estimated Amortization of Intangibles Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Over the counter Over the Counter [Member] Exchange traded Exchange Traded [Member] Derivative Assets, Fair Value Gross Derivative Asset, Fair Value, Gross Asset Cash collateral Derivative, Collateral, Obligation to Return Cash Derivative Assets, Fair Value, Gross, Net of cash collateral Derivative Asset, Fair Value, Gross, Amount Offset Against Collateral Derivative Asset, Fair Value, Gross, Amount Offset Against Collateral Derivative Liabilities, Fair Value, Gross Derivative Liability, Fair Value, Gross Liability Cash collateral Derivative, Collateral, Right to Reclaim Cash Derivative Liabilities, Fair Value, Gross, Net of cash collateral Derivative Liability, Fair Value, Gross, Amount Offset Against Collateral Derivative Liability, Fair Value, Gross, Amount Offset Against Collateral Foreign exchange contracts Foreign exchange contracts Derivative Assets, net Derivative Asset, Fair Value, Amount Offset Against Collateral Derivative Liabilities, net Derivative Liability, Fair Value, Amount Offset Against Collateral Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Receivable Type [Axis] Receivable Type [Axis] Receivable [Domain] Receivable [Domain] Accounts Receivable Domestic Accounts Receivable Domestic [Member] Accounts receivable domestic. Accounts Receivable Foreign Accounts Receivable Foreign [Member] Accounts receivable foreign. Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Gross accounts receivables Accounts Receivable, Gross, Current Gross domestic securitized accounts receivable Accounts Receivable from Securitization Less allowance for doubtful accounts Net accounts and securitized accounts receivable Accounts, Notes, Loans and Financing Receivable, Net, Current Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] General and Administrative Expense General and Administrative Expense [Member] Stock-based compensation Share-based Compensation Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] 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] Non-compete agreements Noncompete Agreements [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] 2017 Acquisitions 2017 Acquisitions [Member] 2017 Acquisitions [Member] Cambridge Cambridge [Member] Cambridge [Member] Creative Lodging Solutions Creative Lodging Solutions [Member] Creative Lodging Solutions [Member] Series of Individually Immaterial Business Acquisitions Series of Individually Immaterial Business Acquisitions [Member] Servicos e Technologia de Pagamentos S.A. Servicos e Technologia de Pagamentos S.A. [Member] Servicos e Technologia de Pagamentos S.A. [Member] Masternaut Group Holdings Limited Masternaut Group Holdings Limited [Member] Masternaut Group Holdings Limited [Member] 2014 Acquisition Two Thousand Fourteen Acquisition [Member] Two Thousand Fourteen Acquisition [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Shell Shell [Member] Shell [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Purchase price, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Cash acquired Cash Acquired from Acquisition Deferred payments of previous acquisitions Payments for Previous Acquisition Payments for other investing activities Payments for (Proceeds from) Other Investing Activities Equity method investments Equity Method Investments Return on equity method investment Proceeds from Equity Method Investment, Distribution Aggregate purchase price Business Combination, Consideration Transferred Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Liabilities arising from contingencies Business Combination, Liabilities Arising from Contingencies, Amount Recognized Indemnification assets Business Combination, Indemnification Assets, Amount as of Acquisition Date Issuance of new debt in acquisition Business Combination, Consideration Transferred, Liabilities Incurred Concentration Risk [Table] Concentration Risk [Table] US, Brazil and UK US, Brazil and UK [Member] US, Brazil and UK [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Number of reportable segments Number of Reportable Segments Number of product lines Number Of Product Lines Number Of Product Lines Number of countries where products are sold Number Of Countries Where Products Are Sold Number Of Countries Where Products Are Sold Concentration risk, percentage Concentration Risk, Percentage Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Consideration Disposal Group, Including Discontinued Operation, Consideration Gain on disposal Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal Tax effect of gain from disposal Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation Provisional income tax expense (benefit) 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) Provisional income tax benefit due to corporate rate reduction Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Liability, Provisional Income Tax Benefit Transition tax Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Change in tax rate effect on deferred tax asset Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Expense Income tax expense at federal statutory rate, rate Valuation allowance Deferred Tax Assets, Valuation Allowance Increase (decrease) in the total valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Net operating loss carryforwards for state income tax purposes Deferred Tax Assets, Operating Loss Carryforwards, State and Local Federal operating loss carry forwards Deferred Tax Assets, Operating Loss Carryforwards, Foreign Accrued interest and penalties related to the unrecognized tax benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Total unrecognized tax benefits Unrecognized tax benefits that would affect effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Summary of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Long term deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Long term deferred tax liabilities Deferred Tax Liabilities Net Non Current Deferred tax liabilities, net non-current. Net long term deferred taxes Deferred Tax Liabilities, Net, Noncurrent Net deferred tax liabilities Deferred Tax Liabilities, Net United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Valuation Allowance [Table] Valuation Allowance [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Valuation Allowance of Deferred Tax Assets Valuation Allowance of Deferred Tax Assets [Member] Valuation Allowance [Line Items] Valuation Allowance [Line Items] Beginning balance Valuation Allowances and Reserves, Balance Additions Valuation Allowances and Reserves, Additions for Adjustments Balance at December 31, 2017 (before impact of Tax Act) Valuation Allowance and Reserves, Balance Before Impact Of Tax Cuts And Jobs Act Of 2017 Valuation Allowance and Reserves, Balance Before Impact Of Tax Cuts And Jobs Act Of 2017 Reduction in valuation allowance due to rate change from Tax Act Valuation Allowances and Reserves, Deductions Ending balance 2018 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three 2021 Long-term Debt, Maturities, Repayments of Principal in Year Four 2022 Long-term Debt, Maturities, Repayments of Principal in Year Five Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Asset Dispositions Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Schedule of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Property Plant And Equipment Capitalized Interest Costs [Abstract] Property Plant And Equipment Capitalized Interest Costs [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer hardware and software Computer Equipment [Member] Card-reading equipment Card Reading Equipment [Member] Card-reading equipment. Furniture, fixtures, and vehicles Furniture Fixtures And Vehicles [Member] Furniture Fixtures And Vehicles [Member] Buildings and improvements Building Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated Useful Lives (in Years) Property, Plant and Equipment, Useful Life Computer hardware and software Capitalized Computer Software Gross And Hardware Capitalized Computer Software Gross And Hardware Card reading equipment Card Reading Equipment Gross Card-Reading equipment gross. Furniture fixtures and Vehicles Furniture Fixtures And Vehicles Gross Furniture Fixtures And Vehicles Gross Buildings and improvements Buildings and Improvements, Gross Property, plant and equipment, gross Property, Plant and Equipment, Gross Less: accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property, plant and equipment, net Property, Plant and Equipment, Net Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Accounts receivable, principally due to the allowance for doubtful accounts Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Accrued expenses not currently deductible for tax Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Stock based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Income tax credits Deferred Tax Assets, Tax Credit Carryforwards Net operating loss carry forwards Deferred Tax Assets, Operating Loss Carryforwards Investments Deferred Tax Assets, Equity Method Investments Accrued escheat Deferred Tax Assets Accrued Escheat Deferred Tax Assets Accrued Escheat Fixed assets, intangibles and other Deferred Tax Assets, Fixed Assets, Intangibles And Other Deferred tax assets, fixed assets, intangibles and other. Deferred tax assets before valuation allowance Deferred Tax Assets, Gross Valuation allowance Deferred tax assets, net Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Intangibles—including goodwill Deferred Tax Liabilities, Goodwill and Intangible Assets Basis difference in investment in foreign subsidiaries Deferred Tax Liabilities, Undistributed Foreign Earnings Prepaid expenses Deferred Tax Liabilities, Prepaid Expenses Property and equipment, principally due to differences between book and tax depreciation, and other Deferred Tax Liabilities, Property, Plant and Equipment Deferred tax liabilities Deferred Tax Liabilities, Gross Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Foreign exchange contracts Foreign Exchange Contract [Member] Fair Value, Hierarchy [Axis] Fair 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Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Restricted Stock Shares Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Shares, outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Shares, cancelled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Shares, issued (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Shares, outstanding, ending balance (in shares) Restricted Stock Share Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Weighted average grant date fair value, outstanding, beginning balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Weighted average grant date fair value, granted (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, cancelled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Weighted average grant date fair value, issued (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value, outstanding, ending balance (in usd per share) Assets Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents, Current Accounts and other receivables (less allowance for doubtful accounts of $46,031 and $32,506, respectively) Accounts Receivable, Net, Current Securitized accounts receivable—restricted for securitization investors Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Goodwill Other intangibles, net Intangible Assets, Net (Excluding Goodwill) Investments Other assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders’ equity Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued expenses Customer deposits Customer Deposits, Current Current portion of notes payable and lines of credit Notes and Loans Payable, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Notes payable and other obligations, less current portion Deferred income taxes Deferred Income Tax Liabilities, Net Other noncurrent liabilities Other Liabilities, Noncurrent Total noncurrent liabilities Liabilities, Noncurrent Commitments and contingencies (Note 13) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.001 par value; 475,000,000 shares authorized; 122,083,059 shares issued and 89,803,982 shares outstanding at December 31, 2017; and 121,259,960 shares issued and 91,836,938 shares outstanding at December 31, 2016 Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Less treasury stock (32,279,077 shares at December 31, 2017; and 29,423,022 shares at December 31, 2016) Treasury Stock, Value Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for doubtful accounts beginning of year Provision for bad debts Provision for Doubtful Accounts Allowance for Doubtful Accounts Receivable, Write-offs Allowance for Doubtful Accounts Receivable, Write-offs Allowance for doubtful accounts end of year Schedule of Selected Quarterly Financial Data Quarterly Financial Information [Table Text Block] Finite And Indefinite Lived Intangible Assets [Table] Finite And Indefinite Lived Intangible Assets [Table] Finite And Indefinite Lived Intangible Assets [Table] Customer and vendor agreements Customer and Vendor Contracts [Member] Customer and Vendor Contracts [Member] Trade names and trademarks—other Trademarks and Trade Names [Member] Software Computer Software, Intangible Asset [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] Trade names and trademarks—indefinite lived Trade Names And Trademarks Indefinite Lived [Member] Trade Names And Trademarks Indefinite Lived [Member] Finite And Indefinite Lived Intangible Assets [Line Items] Finite And Indefinite Lived Intangible Assets [Line Items] Finite And Indefinite Lived Intangible Assets [Line Items] Weighted- Avg Useful Life (Years) Finite-Lived Intangible Asset, Useful Life Gross Carrying Amounts Intangible Assets, Gross (Excluding Goodwill) Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amount Statement of Cash Flows [Abstract] Operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Provision for losses on accounts receivable Amortization of deferred financing costs and discounts Amortization of Debt Issuance Costs and Discounts Amortization of intangible assets Amortization of premium on receivables Investment Income, Amortization of Premium Loss on extinguishment of debt Deferred income taxes Deferred Income Taxes and Tax Credits Gain on disposition of business Gain (Loss) on Disposition of Business Other non-cash operating income Other Noncash Income (Expense) Changes in operating assets and liabilities (net of acquisitions and disposition): Increase (Decrease) in Operating Capital [Abstract] Restricted cash Increase (Decrease) in Restricted Cash for Operating Activities Accounts receivable and other receivables Increase (Decrease) in Accounts Receivable Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase (Decrease) in Other Operating Assets Excess tax benefits related to stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Accounts payable, accrued expenses and customer deposits Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Acquisitions, net of cash acquired1 Purchases of property and equipment Proceeds from disposal of a business Proceeds from Divestiture of Businesses Other Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Excess tax benefits related to stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Borrowings (payments) on securitization facility, net Proceeds from (Repayments of) Secured Debt Repurchase of common stock Deferred financing costs paid and debt discount Payments of Financing Costs Proceeds from issuance of notes payable Proceeds from Notes Payable Principal payments on notes payable Repayments of Notes Payable Borrowings from revolver Proceeds from Lines of Credit Payments on revolver Repayments of Lines of Credit Borrowings (payments) on swing line of credit, net Proceeds from (Repayments of) Lines of Credit Payment of contingent consideration Payment Of Contingent Consideration Payment of contingent consideration. Other Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of foreign currency exchange rates on cash Effect of Exchange Rate on Cash and Cash Equivalents Net increase (decrease) in cash Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes Income Taxes Paid, Net Non cash investing activity, notes assumed in acquisitions Summary Operating Lease Future Minimum Payments Lessee, Operating Lease, Disclosure [Table Text Block] Stock Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Shares, outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Shares, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Shares, exercised (in share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Shares, forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Shares, outstanding, ending balance (in shares) Options, Outstanding, Weighted Average Exercise Price [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted average exercise price, outstanding, beginning balance (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted average exercise price, exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted average exercise price, forfeited (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted average exercise price, outstanding, ending balance (in usd per share) Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Shares, expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Weighted average exercise price of options to vest (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Options exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted average exercise price of options (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted average fair value of options granted in period (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Aggregate intrinsic value, options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value of options exercised during period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Current income taxes, Federal Current Federal Tax Expense (Benefit) Current income taxes, State Current State and Local Tax Expense (Benefit) Current income taxes, Foreign Current Foreign Tax Expense (Benefit) Total current Current Income Tax Expense (Benefit) Deferred income taxes, Federal Deferred Federal Income Tax Expense (Benefit) Deferred income taxes, State Deferred State and Local Income Tax Expense (Benefit) Deferred income taxes, Foreign Deferred Foreign Income Tax Expense (Benefit) Total deferred Deferred Income Tax Expense (Benefit) Earnings Per Share Earnings Per Share [Text Block] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Company's Accounts Receivable and Securitized Accounts Receivable Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Allowance for Doubtful Accounts Related to Accounts Receivable Schedule of Credit Losses for Financing Receivables, Current [Table Text Block] Acquisitions Business Combination Disclosure [Text Block] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Significant Accounting Policies [Table] Masternaut Masternaut [Member] Masternaut [Member] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable Accounts Receivable [Member] Short-term Debt, Type [Axis] Short-term Debt, Type [Axis] Short-term Debt, Type [Domain] Short-term Debt, Type [Domain] New Credit Facility New Credit Facility [Member] New credit facility. Restricted Stock And Restricted Stock Units Restricted Stock And Restricted Stock Units [Member] Restricted Stock And Restricted Stock Units [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items] Threshold period during which company ceases billing and accruing late fees Threshold Period Past Due, Company Ceases Billing And Accruing Late Fees, Trade Accounts Receivable Threshold Period Past Due, Company Ceases Billing And Accruing Late Fees, Trade Accounts Receivable Cost of sales for equipment sold Cost of Goods Sold Customer payment terms (in days) Payment Period To Customers Customer payment terms. Period past due for accounts receivable deemed as uncollectible Threshold Period Past Due for Write-off of Trade Accounts Receivable Period past due for allowance of trade accounts receivable maximum Threshold Period Past Due for Allowance of Trade Accounts Receivable Maximum Threshold period past due for allowance of trade accounts receivable maximum. Maximum allocation period (in year) Maximum Allocation Period Maximum allocation period. Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Non-cash impairment charge on equity method investment Equity Method Investment, Other than Temporary Impairment Reclassification of foreign currency translation loss to investment, net of tax Capitalized computer software costs Capitalized Computer Software, Additions Minimum percentage of likelihood required to recognize uncertain income tax position Minimum Percentage Required To Recognized Uncertain Income Tax Position Minimum percentage required to recognized uncertain income tax position. Maturity of cash equivalent, max (in months) Maturity Of Cash And Cash Equivalent Maturity of cash and cash equivalent. Foreign exchange gain (loss) recognized Foreign Currency Transaction Gain (Loss), before Tax Term of derivative contract Derivative, Term of Contract Period of vesting provisions (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Payments of debt issuance costs Debt Issuance Costs, Gross Deferred financing costs Maximum undivided ownership interest pooled accounts receivable amount sold Maximum Undivided Ownership Interest Pooled Accounts Receivable Amount Sold Maximum undivided ownership interest pooled accounts receivable amount sold. Short-term debt outstanding Advertising expense Advertising Expense United States (country of domicile) UNITED STATES Brazil BRAZIL United Kingdom UNITED KINGDOM 2015 Acquisitions Two Thousand Fifteen Acquisitions [Member] Two Thousand Fifteen Acquisitions [Member] Banking relationships Banking Relationship [Member] Banking Relationship [Member] Customer Relationships Customer Relationships [Member] Customer relationships - Accounts Payable Solutions Customer Relationships Accounts Payable Solutions [Member] Customer Relationships Accounts Payable Solutions [Member] Technology Technology Equipment [Member] Useful lives (in years) Trade names and trademarks Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets Customer relationships and other identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $10.00 – 58.02 Exercise Price Range 1 [Member] Exercise price range 1. 74.99 – 111.09 Exercise Price Range 2 [Member] Exercise price range 2. 114.90 – 138.47 Exercise Price Range 3 [Member] Exercise price range 3. 140.23-150.74 Exercise Price Range 4 [Member] Exercise price range 4 151.16-158.24 Exercise Price Range 5 [Member] Exercise price range 5. 165.96-174.35 Exercise Price Range 6 [Member] Exercise price range 6. Exercise price, minimum (in usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Exercise price, maximum (in usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Exercise price, options outstanding (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Exercise price, weighted average remaining vesting life in years Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Exercise price, options exercisable (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Selected Quarterly Financial Data [Table] Selected Quarterly Financial Data [Table] Selected Quarterly Financial Data [Table] Selected Quarterly Financial Data [Line Items] Selected Quarterly Financial Data [Line Items] Selected Quarterly Financial Data [Line Items] Tax benefit related to change in enacted tax rate Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit) Legal fees Legal Fees Non-cash stock based compensation expense Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Rent expense for noncancelable operating leases Operating Leases, Rent Expense, Net Lease renewable period, maximum (in years) Lessee, Operating Lease, Renewal Term Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Restricted cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Trade and other receivables Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Prepaid expenses and other Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets Deferred tax assets Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Property and equipment Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Other long term assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Liabilities assumed Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities Deferred tax liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Aggregate purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Property, Plant and Equipment [Abstract] Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Schedule of Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Debt Debt Disclosure [Text Block] Schedule of Notional Amounts of Outstanding Derivative Positions Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] Schedule of Derivative Liabilities at Fair Value Schedule of Derivative Liabilities at Fair Value [Table Text Block] Schedule of Derivative Assets at Fair Value Schedule of Derivative Assets at Fair Value [Table Text Block] Revenue Recognition and Presentation Revenue Recognition, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Credit Risk and Reserve for Losses on Receivables Credit Risk And Reserve For Losses On Receivables Policy Policy [Policy Text Block] Credit Risk And Reserve For Losses On Receivables, Policy [Policy Text Block]. Business Combinations Business Combinations Policy [Policy Text Block] Impairment of Long-Lived Assets, Goodwill, Intangibles and Equity Method Investment Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Property, Plant and Equipment and Definite-Lived Intangible Assets Property Plant And Equipment And Definite Lived Intangible Assets Policy [Policy Text Block] Property plant and equipment and definite lived intangible assets policy. Income Taxes Income Tax, Policy [Policy Text Block] Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Derivatives Derivatives, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Deferred Financing Costs/Debt Discounts Deferred Charges, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Accounts Receivable Receivables, Policy [Policy Text Block] Advertising Advertising Costs, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Pending Adoption of Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block]