Fair Value Measurements (Details 4) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Fair Value Measurements (Textuals) [Abstract]
Amount charged off in loan balances as compared to amount that would have been charged based on appraised value of collateral	$ 76.3		$ 58.2
Carrying value of impaired collateral dependent commercial real estate loans not subject to appraisals	6.2
Transaction costs related to loans held for investment	16.6	23.2
Transaction costs related to REO	$ 1.7	$ 2.6