Note Related party transactions (Impact on the results of operations of transactions between the Corporation and PRAP 2013-1 International, LLC) (Detail) - PR Asset Portfolio 2013-1 International, LLC - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Related Party Transaction [Line Items]
Related Party Transaction Revenues From Transactions With Related Party	$ 5	$ 444
Loans
Related Party Transaction [Line Items]
Interest Income Related Party	9	445
Deposits
Related Party Transaction [Line Items]
Interest Expense Related Party	$ (4)	$ (1)