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
		Mar. 31, 2017		Mar. 31, 2016	Dec. 31, 2016
Accretable yield
Beginning Balance		$ 1,010,087		$ 1,112,458
Accretion		(36,892)		(43,533)
Change In Expected Cash Flows		8,011		59,883
Ending Balance		981,206		1,128,808
Carrying amount of loans
Beginning Balance		1,738,329	[1]	1,974,501
Accretion		36,892		43,533
Collections		(86,321)		(82,593)
Ending Balance	[2]	1,688,900	[1]	1,935,441
Less: Allowance for loan losses		(66,544)		(62,967)	$ (68,877)
Carrying amount, net of allowance		1,622,356		1,872,474	1,669,452
Non-credit Impaired Loans
Accretable yield
Beginning Balance		1,001,908		1,105,732
Accretion		(36,016)		(42,000)
Change In Expected Cash Flows		7,789		54,544
Ending Balance		973,681		1,118,276
Carrying amount of loans
Beginning Balance		1,695,381	[1]	1,898,146
Accretion		36,016		42,000
Collections		(83,069)		(74,206)
Ending Balance	[2]	1,648,328	[1]	1,865,940
Less: Allowance for loan losses		(59,283)		(58,703)	(61,855)
Carrying amount, net of allowance		1,589,045		1,807,237	1,633,526
Credit Impaired Loans
Accretable yield
Beginning Balance		8,179		6,726
Accretion		(876)		(1,533)
Change In Expected Cash Flows		222		5,339
Ending Balance		7,525		10,532
Carrying amount of loans
Beginning Balance		42,948	[1]	76,355
Accretion		876		1,533
Collections		(3,252)		(8,387)
Ending Balance	[2]	40,572	[1]	69,501
Less: Allowance for loan losses		(7,261)		(4,264)	(7,022)
Carrying amount, net of allowance		$ 33,311		$ 65,237	$ 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 $542 million as of March 31, 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 $ 542 million as of March 31, 2017 (March 31, 2016- $615 million).