NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Income Statement Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Variable Interest Entity [Line Items]
Net (loss) income	$ (10,752)	$ 24,074	$ 42,787	$ 69,371