Commitments And Contingencies (Reserve For Loan Repurchases) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments And Contingencies [Abstract]
Beginning balance	$ 3,658	$ 1,595
Provision	3,475	5,725	1,595
Loans Repurchased	(4,864)	(3,662)
Ending balance-reserve for loan repurchases	$ 2,269	$ 3,658	$ 1,595