Note Guarantees (Changes in the Corporation's liability of estimated losses associated with customary respresentations and warranties related to loans sold by BPPR) (Detail) - Indemnification Guarantee - Banco Popular de Puerto Rico - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Guarantor Obligations [Line Items]
Balance as of beginning of period	$ 10,936	$ 8,087
Provision (reversal) for representations and warranties	(399)	106
Net charge-offs	0	(191)
Balance as of end of period	$ 10,537	$ 8,002