Note Loans (Changes in the carrying amount and the accretable yield for the acquired loans in the Westernbank FDIC-assisted transaction) (Detail) - Westernbank Puerto Rico - Acquired loans in an FDIC assisted transaction - ASC Subtopic 310-30 - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2017		Jun. 30, 2016		Dec. 31, 2016
Accretable yield
Beginning Balance		$ 981,206		$ 1,128,808		$ 1,010,087		$ 1,112,458
Accretion		(36,488)		(48,476)		(73,380)		(92,009)
Change In Expected Cash Flows		(2,050)		(8,652)		5,961		51,231
Ending Balance		942,668		1,071,680		942,668		1,071,680
Carrying amount of loans
Beginning Balance		1,688,900	[1]	1,935,441	[2],[3]	1,738,329	[1],[3]	1,974,501	[1],[3]
Accretion		36,488		48,476		73,380		92,009
Collections		(107,601)		(183,974)	[4]	(193,922)		(266,567)	[4]
Ending Balance	[2],[3]	1,617,787	[1]	1,799,943		1,617,787	[1]	1,799,943
Less: Allowance for loan losses		(65,674)		(66,995)		(65,674)		(66,995)		$ (68,877)
Carrying amount, net of allowance		1,552,113		1,732,948		1,552,113		1,732,948		1,669,452
Non-credit Impaired Loans
Accretable yield
Beginning Balance		973,681		1,118,276		1,001,908		1,105,732
Accretion		(35,679)		(45,137)		(71,695)		(87,137)
Change In Expected Cash Flows		(1,798)		(11,168)		5,991		43,376
Ending Balance		936,204		1,061,971		936,204		1,061,971
Carrying amount of loans
Beginning Balance		1,648,328	[1]	1,865,940	[2],[3]	1,695,381	[1],[3]	1,898,146	[1],[3]
Accretion		35,679		45,137		71,695		87,137
Collections		(104,811)		(156,464)	[4]	(187,880)		(230,670)	[4]
Ending Balance	[2],[3]	1,579,196	[1]	1,754,613		1,579,196	[1]	1,754,613
Less: Allowance for loan losses		(59,165)		(57,895)		(59,165)		(57,895)		(61,855)
Carrying amount, net of allowance		1,520,031		1,696,718		1,520,031		1,696,718		1,633,526
Credit Impaired Loans
Accretable yield
Beginning Balance		7,525		10,532		8,179		6,726
Accretion		(809)		(3,339)		(1,685)		(4,872)
Change In Expected Cash Flows		(252)		2,516		(30)		7,855
Ending Balance		6,464		9,709		6,464		9,709
Carrying amount of loans
Beginning Balance		40,572	[1]	69,501	[2],[3]	42,948	[1],[3]	76,355	[1],[3]
Accretion		809		3,339		1,685		4,872
Collections		(2,790)		(27,510)	[4]	(6,042)		(35,897)	[4]
Ending Balance	[2],[3]	38,591	[1]	45,330		38,591	[1]	45,330
Less: Allowance for loan losses		(6,509)		(9,100)		(6,509)		(9,100)		(7,022)
Carrying amount, net of allowance		$ 32,082		$ 36,230		$ 32,082		$ 36,230		$ 35,926

[1] The carrying amount of loans acquired from Westernbank and accounted for under ASC 310-30 which remains subject to the loss sharing agreement with the FDIC amounted to approximately $526 million as of June 30, 2017 and $563 million as of December 31, 2016.

[2] The carrying amount of loans acquired from Westernbank and accounted for under ASC 310-30 which remain subject to the loss sharing agreement with the FDIC amounted to approximately $ 526 million as of June 30, 2017 (June 30, 2016- $597 million).

[3] The carrying amount of loans acquired from Westernbank and accounted for under ASC 310-30 which remain subject to the loss sharing agreement with the FDIC amounted to approximately $526 million as of June 30, 2017 (June 30, 2016- $597 million).

[4] For the quarter ended June 30, 2016, includes the impact of the bulk sale of loans with a carrying value of approximately $99 million.