NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Components of Net Servicing Income (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Servicing fees		$ 1,898	$ 1,930	$ 5,897	$ 5,657
Late charges and prepayment penalties		103	200	340	505
All Other Fees	[1]	0	0	(35)	(1)
Adjustment To Servicing Assets For Loans Repurchased	[2]	129	91	387	126
Servicing income, gross		2,130	2,221	6,589	6,287
Amortization and impairment of servicing assets		(1,464)	(1,080)	(3,389)	(2,811)
Servicing income, net		$ 666	$ 1,141	$ 3,200	$ 3,476

[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.