NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Components of Net Servicing Income (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Servicing fees		$ 7,606	$ 7,211	$ 6,999
Late charges and prepayment penalties		674	765	695
Other	[1]	(1)	(161)	(1,253)
Adjustment to servicing assets for loans repurchased	[2]	256	(88)	(86)
Servicing income, gross		8,535	7,727	6,355
Amortization and impairment of servicing assets		(3,554)	(3,387)	(3,384)
Servicing income, net		$ 4,981	$ 4,340	$ 2,971

[1] (1) Mainly consisted of compensatory fees imposed by GSEs.

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