Variable Interest Entities - Schedule of Payments Made to Entity Related to Guarantee Obligations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Variable Interest Entity [Line Items]
Recoveries from Charged-Off Loans	$ 103	$ 234
2009 RSA [Member]
Variable Interest Entity [Line Items]
Regular Payments	1,791	1,990
Discharge Payments	912	0
Recoveries from Charged-Off Loans	(103)	(234)
Net guarantee obligation payments	$ 2,600	$ 1,756

The cash inflow from loans reinstated and recovered that were previously deemed uncollectible.

No definition available.

Name:	us-gaap_ProceedsFromRecoveriesOfLoanPreviouslyChargedOff
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration