LOAN PORTFOLIO - Activity for Specific Reserve (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Specific Reserve:
Balance at beginning of period	$ 102,601	$ 221,749
Provision for loan losses	58,758	188,280
Charge-offs	(106,154)	(307,428)
Balance at end of period	$ 55,205	$ 102,601