LOAN PORTFOLIO - Activity for Specific Reserve (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Specific Reserve:
Balance at beginning of period	$ 55,205	$ 102,601
Provision for loan losses	18,650	14,454
Charge-offs	(11,715)	(32,039)
Balance at end of period	$ 62,140	$ 85,016