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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		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Deposits
Related Party Transaction [Line Items]
Interest Expense Related Party	$ (12)	$ (15)	$ (33)	$ (51)
Other Fee Revenue
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	7,061	7,533	22,656	21,948
Rental Income
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	1,737	1,760	5,119	5,232
Processing Fees
Related Party Transaction [Line Items]
Expenses from Transactions with related party	(43,855)	(44,923)	(132,289)	(131,701)
Other Expense
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	291	269	900	783
Total
Related Party Transaction [Line Items]
Related Party Transaction, Amounts of Transaction	$ (34,778)	$ (35,376)	$ (103,647)	$ (103,789)