Variable Interest Entities - Schedule of Payments Made to Entity Related to Guarantee Obligations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Variable Interest Entity [Line Items]
Recoveries from Charged-Off Loans	$ 0	$ (103)
2009 RSA [Member]
Variable Interest Entity [Line Items]
Regular Payments	1,158	306
Discharge Payments	0	0
Recoveries from Charged-Off Loans	0	(103)
Net guarantee obligation payments	$ 1,158	$ 203