NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Changes in Servicing Assets (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Servicing Assets At Amortized Value [Line Items]
Balance at beginning of period		$ 26,330	$ 24,692	$ 26,244	$ 24,282
Capitalization of servicing assets		1,049	1,297	1,924	2,458
Amortization		(779)	(809)	(1,567)	(1,607)
Adjustment To Servicing Assets For Loans Repurchased	[1]	99	15	258	35
Adjustment to fair value		(197)	(151)	(357)	(124)
Balance at end of period		$ 26,502	$ 25,044	$ 26,502	$ 25,044

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