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

Rent expense for telecommunications and other equipment.

No definition available.

Name:	evtc_RentExpenseForTelecommunicationsAndOtherEquipment
Namespace Prefix:	evtc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration