Statement of Financial Position [Abstract] Preferred stock par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Preferred stock issued (in shares) Preferred Stock, Shares Issued Common stock par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock authorized (in shares) Common Stock, Shares Authorized Common stock issued (in shares) Common Stock, Shares, Issued Common stock outstanding (in shares) Common Stock, Shares, Outstanding Revenue from Contract with Customer [Abstract] Summary of Impact of Adoption of Topic 606 Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Summary of Contract Balances Contract with Customer, Asset and Liability [Table Text Block] Earnings Per Share [Abstract] Net Income Per Common Share Earnings Per Share [Text Block] Accounting Policies [Abstract] Number of countries where the Company provides a broad range of merchant acquiring, payment processing and business process management services (in country) Number of Countries in which Entity Operates Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Calculated under Revenue Guidance in Effect before Topic 606 Calculated under Revenue Guidance in Effect before Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Assets Assets [Abstract] Prepaid expenses and other assets Prepaid Expense and Other Assets, Current Liabilities and stockholders' equity Liabilities and Equity [Abstract] Unearned income Deferred Revenue, Current Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Accounts receivable, net Accounts Receivable, Net, Current Unearned income - long term Deferred Revenue, Noncurrent Revenue recognized that was included in unearned income Contract with Customer, Liability, Revenue Recognized Transaction price allocated to performance obligations that are unsatisfied or partially satisfied Revenue, Remaining Performance Obligation Revenue, remaining performance obligation, period of expected timing of satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Net income attributable to EVERTEC, Inc. Net Income (Loss) Attributable to Parent Less: non-forfeitable dividends on restricted stock Restricted Stock Award, Forfeitures, Dividends Net income available to EVERTEC, Inc.’s common shareholders Net Income (Loss) Available to Common Stockholders, Basic Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average potential dilutive common shares (in shares) Weighted Average Number Diluted Shares Outstanding Adjustment Weighted average common shares outstanding - assuming dilution (in shares) Weighted Average Number of Shares Outstanding, Diluted Net income per common share - basic (in usd per share) Earnings Per Share, Basic Net income per common share - diluted (in usd per share) Earnings Per Share, Diluted Segment Reporting [Abstract] Information about Operations by Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Reconciliation of Income from Operations to Consolidated Net Income Reconciliation of Operating Profit (Loss) from Segments to Consolidated [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] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Shares and RSUs Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Ending balance (in shares) 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 [Abstract] 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 Forfeited (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 Vested (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 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 Ending balance (in usd per share) Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Property, Plant and Equipment [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] Buildings Building [Member] Data processing equipment Data Processing Equipment [Member] Data Processing Equipment [Member] Furniture and equipment Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Property and Equipment, net Property, Plant and Equipment [Line Items] Useful life in years Property, Plant and Equipment, Useful Life Property and equipment, gross Property, Plant and Equipment, Gross Less - accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Depreciable assets, net Property Plant And Equipment Net Excluding Land Property plant and equipment net excluding land. Land Land and Land Improvements Property and equipment, net Property, Plant and Equipment, Net Depreciation and amortization expense related to property and equipment Depreciation, Depletion and Amortization Related Party Transactions [Abstract] Cash and restricted cash deposits in affiliated bank Cash And Restricted Cash Deposits In Affiliated Bank Cash And Restricted Cash Deposits In Affiliated Bank Other due/to from affiliate Other Due From Affiliates [Abstract] Other due from affiliates. Accounts receivable Due from Affiliate, Current Prepaid expenses and other assets Prepaid Expense and Other Assets, Related Parties, Current Amount of assets related to consideration paid in advance to related parties for costs that provide economic benefits in future periods and amount of other assets. Other long-term assets Due from Related Parties, Noncurrent Accounts payable Accounts Payable, Related Parties, Current Unearned income Deferred Revenue Related Party Unearned income, related party. Fair Value Disclosures [Abstract] Financial Instruments and Fair Value Measurements Fair Value Disclosures [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Income Tax Disclosure [Abstract] Current tax provision Current Income Tax Expense (Benefit) Deferred tax benefit Deferred Income Tax Expense (Benefit) Income tax expense Income Tax Expense (Benefit) Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Popular Popular Inc [Member] Popular Inc [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Total Revenue Sales Revenue, Net [Member] Transactions with Third Party Related Party Transaction [Line Items] Total revenues Revenue from Related Parties Cost of revenues Cost of Revenue Rent and other fees Rent And Other Fees Paid To Related Party Rent And Other Fees Paid To Related Party Interest earned from affiliate Interest Earned From And Charged By Affiliates [Abstract] Interest earned from and charged by affiliates. Interest income Interest Income, Related Party Total percentage of revenues from Popular Concentration Risk, Percentage Revenues generated from investee accounted for under equity method Equity Method Investment, Summarized Financial Information, Revenue Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Corporate and Other Corporate And Reconciling Items [Member] Corporate And Reconciling Items [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Payment Services - Puerto Rico & Caribbean Payment Services - Puerto Rico & Caribbean [Member] Payment Services - Puerto Rico & Caribbean [Member] Payment Services - Latin America Payment Services - Latin America [Member] Payment Services - Latin America [Member] Merchant Acquiring, net Merchant Acquiring Net [Member] Merchant Acquiring Net [Member] Business Solutions Business Solutions [Member] Business Solutions [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of operating business segments (in segment) Number of Operating Segments Revenues Revenues Operating costs and expenses Costs and Expenses Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Non-operating income (expenses) Income (Loss) from Equity Method Investments and Other Nonoperating Income (Expense) Income (Loss) from Equity Method Investments and Other Nonoperating Income (Expense) EBITDA Earnings before Interest, Taxes, Depreciation, and Amortization Earnings before Interest, Taxes, Depreciation, and Amortization Compensation and benefits Adjusted EBITDA, Compensation and Benefits Adjusted EBITDA, Compensation and Benefits Transaction, refinancing and other fees Adjusted EBITDA, Transaction, Refinancing, Exit Activity and Other Fees Adjusted EBITDA, Transaction, Refinancing, Exit Activity and Other Fees Adjusted EBITDA Adjusted Earnings before Interest, Taxes, Depreciation, and Amortization Adjusted Earnings before Interest, Taxes, Depreciation, and Amortization Transactions with Related Parties Schedule of Related Party Transactions [Table Text Block] Summary of Balances of Transactions with Related Parties Schedule Of Related Party Balances Of Transactions [Table Text Block] Tabular disclosure of balance sheet data resulting from related party transactions. Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Term A due on April 17, 2018 Term One Due On April Seventeen Two Thousand Eighteen [Member] Term One Due On April Seventeen Two Thousand Eighteen Member Term A due January 17, 2020 Senior Secured Credit Facility, Term A Loan, Due January 2020 [Member] Senior Secured Credit Facility, Term A Loan, Due January 2020 [Member] Term B due on April 17, 2020 Term Two Due On April Seventeen Two Thousand Twenty [Member] Term Two Due On April Seventeen Two Thousand Twenty Member Senior Secured Revolving Credit Facility Expiring On April Seventeen Two Thousand Eighteen [Member] Expiring On April Seventeen Two Thousand Eighteen [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Note Payable due on August 31, 2019 Note Payable Due On August 31, 2019 [Member] Note Payable Due On August 31, 2019 [Member] Note Payable due on April 30, 2021 Note Payable Due On April One Two Thousand Twenty One [Member] Note payable due on April one two thousand twenty one. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Credit Facility Line of Credit [Member] Notes Payable Notes Payable to Banks [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Credit facility Secured Debt Note payable Notes Payable Total debt Long-term Debt Margin interest rate Debt Instrument, Basis Spread on Variable Rate Minimum variable rate Debt Instrument, Interest Rate, Variable Rate Floor Debt Instrument, Interest Rate, Variable Rate Floor Fixed interest rate Debt Instrument, Interest Rate, Stated Percentage The Company Company Description [Policy Text Block] A description of the company. Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Income Statement [Abstract] Operating costs and expenses Operating Costs and Expenses [Abstract] Cost of revenues, exclusive of depreciation and amortization shown below Cost Of Revenues Excluding Depreciation And Amortization The aggregate cost of goods produced and sold and services rendered during the reporting period, excluding depreciation and amortization. Selling, general and administrative expenses Selling, General and Administrative Expense Total operating costs and expenses Income from operations Operating Income (Loss) Non-operating income (expenses) Nonoperating Income (Expense) [Abstract] Interest income Interest Income, Deposits with Financial Institutions Interest expense Interest Expense Earnings of equity method investment Income (Loss) from Equity Method Investments Other income Other Nonoperating Income (Expense) Total non-operating expenses Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Less: Net income attributable to non-controlling interest Net Income (Loss) Attributable to Noncontrolling Interest Net income attributable to EVERTEC, Inc.’s common stockholders Other comprehensive income (loss), net of tax of $140 and $37 Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Gain on cash flow hedge Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax, Portion Attributable to Parent Total comprehensive income attributable to EVERTEC, Inc.’s common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net income per common share - basic attributable to EVERTEC, Inc.’s common stockholders (in usd per share) Net income per common share - diluted attributable to EVERTEC, Inc.’s common stockholders (in usd per share) Cash dividends declared per share (in usd per share) Common Stock, Dividends, Per Share, Declared Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill Goodwill [Line Items] Changes in the Carrying Amount of Goodwill Goodwill [Roll Forward] Beginning balance Goodwill Foreign currency translation adjustments Goodwill, Foreign Currency Translation Gain (Loss) Ending balance Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Segregation of Income Tax Expense Based on Location of Operations Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Products and services transferred at a point in time Transferred at Point in Time [Member] Products and services transferred over time Transferred over Time [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Earnings Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Non-Controlling Interest Noncontrolling Interest [Member] Statement [Line Items] Statement [Line Items] Changes in Stockholders’ Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Beginning balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Cumulative adjustment from implementation of ASC 606 Cumulative Effect of New Accounting Principle in Period of Adoption Share-based compensation recognized Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Restricted stock units delivered, net of cashless (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock units delivered, net of cashless Stock Issued During Period Value Restricted Stock Award Net Of Cashless Exercise Stock issued during period value restricted stock award net of cashless exercise. Net income Other comprehensive gain Other Comprehensive Income (Loss), Net of Tax Ending balance (in shares) Ending balance Total EBITDA Less Segment Reporting Information, Operating Income (Loss) [Abstract] Income tax expense Interest expense, net Interest Income (Expense), Net Depreciation and amortization Document And Entity Information [Abstract] Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Trading Symbol Trading Symbol 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 Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Related Party Transactions Related Party Transactions Disclosure [Text Block] Equity [Abstract] Summary of Changes in Balances of Accumulated Other Comprehensive Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Income Tax Income Tax Disclosure [Text Block] Derivative [Table] Derivative [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Interest Rate Swap Interest Rate Swap [Member] 1-month LIBOR Derivative [Line Items] Derivative [Line Items] Notional Amount Derivative, Notional Amount Fixed Rate Unremitted earnings from foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Gross deferred tax asset Deferred Tax Assets, Gross Gross deferred tax liability Deferred Tax Liabilities, Gross Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Senior Secured Term B Loan Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Secured credit facilities Long-term Line of Credit Statement of Cash Flows [Abstract] Cash flows from 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] Amortization of debt issue costs and accretion of discount Amortization of Debt Issuance Costs and Discounts Provision for doubtful accounts and sundry losses Provision For Doubtful Accounts And Sundry Losses Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). Also includes additional operating losses not otherwise itemized or categorized. Share-based compensation Share-based Compensation Loss on disposition of property and equipment and other intangibles Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Earnings of equity method investment Decrease (increase) in assets: Increase (Decrease) in Operating Assets [Abstract] Accounts receivable, net Increase (Decrease) in Accounts and Other Receivables Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Other long-term assets Increase (Decrease) in Other Noncurrent Assets (Decrease) increase in liabilities: Increase (Decrease) in Operating Liabilities [Abstract] Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income tax payable Increase (Decrease) in Income Taxes Payable Unearned income Increase (Decrease) in Deferred Revenue Other long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Total adjustments Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities 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, Continuing Operations [Abstract] Additions to software Payments to Acquire Intangible Assets Property and equipment acquired Payments to Acquire Property, Plant, and Equipment 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, Continuing Operations [Abstract] Statutory withholding taxes paid on share-based compensation Payments Related to Tax Withholding for Share-based Compensation Net decrease in short-term borrowings Proceeds from (Repayments of) Short-term Debt Repayment of short-term borrowing for purchase of equipment and software Repayments of Short-term Debt Dividends paid Payments of Dividends Repurchase of common stock Payments for Repurchase of Common Stock Repayment of long-term debt Repayments of Long-term Debt Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of the period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash Reconciliation of cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents, Current Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes Income Taxes Paid Supplemental disclosure of non-cash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Payable due to vendor related to software acquired Noncash or Part Noncash Acquisition, Value of Assets Acquired Impairment of goodwill Goodwill and Intangible Asset Impairment Amortization expense for intangible assets Amortization of Intangible Assets Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Financial assets Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Interest rate swap Interest Rate Derivative Assets, at Fair Value The Company and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [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] Customer relationships Customer Relationships [Member] Trademark Trademarks [Member] Software packages Computer Software, Intangible Asset [Member] Non-compete agreement Noncompete Agreements [Member] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Useful life in years Finite-Lived Intangible Asset, Useful Life Gross amount Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Net carrying amount Finite-Lived Intangible Assets, Net Current tax provision Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Puerto Rico Current Territory Tax Expense Benefit The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted Puerto Rico tax law to the local taxable income or loss from continuing operations. United States Current Federal Tax Expense (Benefit) Foreign countries Current Foreign Tax Expense (Benefit) Total current tax provision Deferred tax benefit Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Puerto Rico Deferred Territory Income Tax Expense Benefit The component of total income tax expense for the period comprised of the increase (decrease) in the entity's net Puerto Rico deferred tax assets and liabilities attributable to continuing operations as determined by applying the provisions of applicable enacted tax laws of the country of domicile. United States Deferred Federal Income Tax Expense (Benefit) Foreign countries Deferred Foreign Income Tax Expense (Benefit) Total deferred tax benefit Schedule of Reconciliation of Numerator and Denominator of Income Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] 2013 Credit Agreement, Term B Loan Senior Secured Credit Facility, Term B Loan, Due April 2018 [Member] Senior Secured Credit Facility, Term B Loan, Due April 2018 [Member] 2013 Credit Agreement, Revolving Facility Senior Secured Credit Facility, Revolving Credit Facility, Old Credit Facility [Member] Senior Secured Credit Facility, Revolving Credit Facility, Old Credit Facility [Member] Maturity extended Extended Maturity of Senior Secured Credit Facility [Member] Extended Maturity of Senior Secured Credit Facility [Member] Maturity not extended Maturity Not Extended Under Senior Secured Credit Facility [Member] Maturity Not Extended Under Senior Secured Credit Facility [Member] Maximum amount under credit facilities Line of Credit Facility, Maximum Borrowing Capacity Additional borrowing capacity available under the Revolving Facility Line of Credit Facility, Remaining Borrowing Capacity Non interest bearing financing agreement Debt Instrument, Face Amount Losses reclassified from accumulated other comprehensive loss into income Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net Losses expected to be reclassified from accumulated other comprehensive loss into income in the next 12 months Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net Computed income tax at statutory rates Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Differences in tax rates due to multiple jurisdictions Income Tax Reconciliation Differences In Tax Rates Due To Multiple Jurisdictions The portion of the differences in tax rates due to multiple jurisdictions. Tax benefit due to a change in estimate Income Tax Reconciliation Change In Estimate Income Tax Reconciliation Change In Estimate Effect of income subject to tax-exemption grant Income Tax Reconciliation Effect Of Income Subject To Tax Exemption Grant Income tax reconciliation effect of income subject to tax-exemption grant. Unrecognized tax benefit Income Tax Reconciliation Unrecognized Tax Benefit Income tax reconciliation unrecognized tax benefit. Other expense (benefit) Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Equity Stockholders' Equity Note Disclosure [Text Block] Balance at beginning of period Contract with Customer, Asset, Net Services transferred to customers Contract with Customer, Asset, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress Transfers to accounts receivable Contract with Customer, Asset, Reclassified to Receivable Balance at March 31, 2018 Rent expense of office facilities and real estate Rent Expense For Office Facilities And Real Estate Rent expense for office facilities and real estate. Rent expense for telecommunications and other equipment Rent Expense For Telecommunications And Other Equipment Rent expense for telecommunications and other equipment. Other comprehensive income, income tax (benefit) expense expense Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Foreign Currency Translation Adjustments Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Cash Flow Hedge Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Total Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Changes in Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent, Net of Tax [Roll Forward] Other comprehensive income before reclassifications Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Effective portion reclassified to Net Income Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Carrying Amounts and Fair Values of Financial Instruments [Table] Carrying Amounts and Fair Values of Financial Instruments [Table] Carrying Amounts and Fair Values of Financial Instruments [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Amount Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] 2018 Term A Loan 2020 Term A Loan Carrying Amounts and Fair Values of Financial Instruments [Line Items] Carrying Amounts and Fair Values of Financial Instruments [Line Items] Carrying Amounts and Fair Values of Financial Instruments [Line Items] Financial liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Senior secured term loan Long-term Debt, Fair Value Current Assets: Assets, Current [Abstract] Cash and cash equivalents Restricted cash Total current assets Assets, Current Investment in equity investee Equity Method Investments Property and equipment, net Goodwill Other intangible assets, net Other long-term assets Other Assets, Noncurrent Total assets Assets Liabilities and stockholders’ equity Current Liabilities: Liabilities, Current [Abstract] Accrued liabilities Accrued Liabilities, Current Accounts payable Accounts Payable, Current Income tax payable Accrued Income Taxes, Current Current portion of long-term debt Long-term Debt, Current Maturities Short-term borrowings Short-term Debt Total current liabilities Liabilities, Current Long-term debt Long-term Debt, Excluding Current Maturities Deferred tax liability Deferred Income Tax Liabilities, Net Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 12) Commitments and Contingencies Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value $0.01; 2,000,000 shares authorized; none issued Preferred Stock, Value, Issued Common stock, par value $0.01; 206,000,000 shares authorized; 72,429,141 shares issued and outstanding at March 31, 2018 (December 31, 2017 - 72,393,933) Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated earnings Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Total EVERTEC, Inc. stockholders’ equity Stockholders' Equity Attributable to Parent Non-controlling interest Stockholders' Equity Attributable to Noncontrolling Interest Total equity Total liabilities and equity Liabilities and Equity Nonvested Restricted Shares and RSUs Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Restricted Stock Units Time Based Awards Time Based Awards [Member] Time Based Awards [Member] Awards with Performance Conditions Performance Shares [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2015 LTIP Fiscal 2015 Long-Term Incentive Plan [Member] Fiscal 2015 Long-Term Incentive Plan [Member] 2016 LTIP Fiscal 2016 Long-Term Incentive Plan [Member] Fiscal 2016 Long-Term Incentive Plan [Member] 2017 LTIP Fiscal 2017 Long-Term Incentive Plan [Member] Fiscal 2017 Long-Term Incentive Plan [Member] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Performance measurement period Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Measurement Period Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Measurement Period Requisite service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Performance adjustment percent Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Adjustment Percent Share-Based Compensation Arrangement By Share-Based Payment Award, Performance Adjustment Percent Share-based compensation expenses Allocated Share-based Compensation Expense Maximum unrecognized cost for stocks and RSU's Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Unrecognized compensation cost, weighted average period of recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Total Debt Schedule of Debt [Table Text Block] Summary of Interest Rate Swap Transaction Schedule of Interest Rate Derivatives [Table Text Block] Carrying Amount of Derivative Instruments on Company's Balance Sheet Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block] Share-based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Fair Value Measurement for Liability at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Carrying Value and Estimated Fair Values for Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Revolving facility, current borrowing capacity Line of Credit Facility, Current Borrowing Capacity Revolving facility, total borrowing capacity Remaining 2018 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 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 Changes in Carrying Amount of Goodwill Allocated by Reportable Segments Schedule of Goodwill [Table Text Block] Carrying Amount of Other Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Estimated Amortization Expenses Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Other long-term assets Derivative Asset Accounting Changes and Error Corrections [Abstract] Cumulative effect to retained earnings for initially applying the new revenue standard Revenues Revenue from Contract with Customer [Text Block] Property and Equipment, net Property, Plant and Equipment [Table Text Block] Recent Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Debt and Short-Term Borrowings Debt Disclosure [Text Block]