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, 2019	Mar. 31, 2018
Guarantor Obligations
Balance as of beginning of period	$ 10,837	$ 11,742
Provision (reversal) for representations and warranties	104	(152)
Net charge-offs	(75)	(172)
Balance as of end of period	$ 10,866	$ 11,418