Selected Balance Sheet information (Detail) - Entity [Domain] - USD ($) $ in Thousands		Jun. 30, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets		$ 36,750,113	$ 33,096,695
Deposits		27,750,694	24,807,535
PUERTO RICO
Segment Reporting Information [Line Items]
Total assets		28,299,519	26,276,561
Loans		17,931,326	17,704,170
Deposits		21,581,425	20,365,445
UNITED STATES
Segment Reporting Information [Line Items]
Total assets		7,322,694	5,689,604
Loans		4,619,403	3,568,564
Deposits		5,111,236	3,442,084
Other [Member]
Segment Reporting Information [Line Items]
Total assets		1,127,900	1,130,530
Loans		776,353	780,483
Deposits	[1]	$ 1,058,033	$ 1,000,006

[1] Represents deposits from BPPR operations located in the US and British Virgin Islands.