NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Income Statement Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Variable Interest Entity [Line Items]
Revenues	$ 686,894	$ 695,297	$ 630,299
Net income (loss)	21,297	392,287	(164,487)
Cpg Gs [Member]
Variable Interest Entity [Line Items]
Revenues	10,565	10,427	2,245
Gross Profit	(6,232)	(321)	(9,982)
Net income (loss)	$ (14,321)	$ (21,012)	$ (6,230)