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Commitments and Contingencies (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract] |  |  |  |
Rent expense of office facilities and real estate | $ 2.2 | $ 2.1 | $ 6.7 | $ 6.1
Rent expense for telecommunications and other equipment | $ 1.8 | $ 1.5 | $ 4.9 | $ 4.5

X
- Definition Rent expense for office facilities and real estate. + References No definition available. + Details
Name: | evtc_RentExpenseForOfficeFacilitiesAndRealEstate
Namespace Prefix: | evtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Rent expense for telecommunications and other equipment. + References No definition available. + Details
Name: | evtc_RentExpenseForTelecommunicationsAndOtherEquipment
Namespace Prefix: | evtc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration