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Note Related party transactions (Impact on the results of operations of transactions between the Corporation and EVERTEC) (Detail) - EVERTEC Inc. - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Deposits
Related Party Transaction [Line Items]
Interest Expense Related Party	$ (14)	$ (12)	$ (25)	$ (21)
Other Fee Revenue
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	8,472	7,929	16,454	15,595
Rental Income
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,751	1,623	3,516	3,382
Processing Fees
Related Party Transaction [Line Items]
Expenses from Transactions with related party	(48,525)	(46,064)	(94,083)	(88,434)
Other Expense
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	291	343	605	609
Total
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (38,025)	$ (36,181)	$ (73,533)	$ (68,869)