NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Changes in Servicing Assets (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Servicing Assets At Amortized Value [Line Items]
Balance at beginning of period		$ 24,282	$ 22,838
Capitalization of servicing assets		5,260	4,919	$ 4,321
Amortization		(3,229)	(3,159)	(3,156)
Adjustment To Servicing Assets For Loans Repurchased	[1]	(256)	88	86
Adjustment to fair value		(325)	(228)	(228)
Balance at end of period		$ 26,244	$ 24,282	$ 22,838

[1] Amount represents the adjustment to fair value related to the repurchase of loans serviced for others.