NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Income Statement Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Variable Interest Entity [Line Items]
Net income (loss)	$ 23,201	$ 15,940	$ 61,509	$ (179,276)
Cpg Gs [Member]
Variable Interest Entity [Line Items]
Revenues	375	526	3,244	2,245
Gross profit	(2,347)	(2,889)	(4,310)	(6,557)
Net income (loss)	$ (2,976)	$ (3,709)	$ (7,778)	$ (1,516)