LOAN PORTFOLIO - Activity for Impaired Loans (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013
Impaired Loans:
Balance at beginning of period	$ 908,858	$ 919,112	$ 904,509
Loans determined impaired during the period	118,549	271,792
Charge-offs	(31,263)	(95,948)
Loans sold, net charge-offs	0	0
Increases to impaired loans (disbursements)	1,768	2,687
Foreclosures	(5,332)	(13,472)
Loans no longer considered impaired	(1,009)	(18,740)
Paid in full or partial payments	(18,557)	(92,417)
Balance at end of period	$ 973,014	$ 973,014	$ 904,509