Commitments and Contingencies - Loans Sold to Investors (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Loan Repurchase Demand Liability Rollforward [Abstract]
Beginning Balance	$ 5,087	$ 5,087
Settlements	(350)	0
Ending Balance	$ 4,737	$ 5,087