LOAN PORTFOLIO - Activity for Impaired Loans (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Impaired Loans:
Balance at beginning of period		$ 806,509	$ 945,407	$ 919,112
Loans determined impaired during the period		288,202	160,837	306,390
Charge-offs	[1]	(67,210)	(99,023)	(106,154)
Impaired Loans Sold		(8,675)	(67,836)	(4,500)
Impaired Loans Transferred to Held For Sale		0	40,005	0
Increases to impaired loans (disbursements)		3,236	3,340	5,028
Foreclosures		(36,161)	(57,728)	(40,582)
Loans no longer considered impaired		(27,643)	(46,489)	(22,333)
Paid in full or partial payments		(70,353)	(72,004)	(111,554)
Balance at end of period		$ 887,905	$ 806,509	$ 945,407

[1] For the year ended December 31, 2016, includes $4.2 million of charge-offs related to impaired loans included in a sale of a $16.3 million pool of non-performing assets and, for the year ended December 31, 2015, includes $63.9 million of charge-offs related to a bulk sales of assets, as further discussed below.