DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on Statement of Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Economic undesignated hedges:
Total gain (loss) on derivatives	$ 123	$ (1,090)	$ 465	$ (2,010)
Interest income - Loans [Member] | Loans [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	170	(954)	469	(1,794)
Interest expense - Notes payable and other borrowings [Member] | Interest Rate Cap Option Written And Purchase [Member] | Embedded written and purchased options on stock index notes payable [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives		40		(7)
Mortgage Banking Activities [Member] | Forward contract sale of TBA GNMA MBS Pools [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	$ (47)	$ (176)	$ (4)	$ (209)