Fair Value Measurements (Details 3) (Measured on a non-recurring basis, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value of Financial Instruments
Losses recognized on assets measured at fair value on a non-recurring basis	$ 45,152	$ 64,925	$ 69,500
Non-performing loans held-for-sale, net
Fair Value of Financial Instruments
Losses recognized on assets measured at fair value on a non-recurring basis	1,066	10,020	5,374
Impaired loans
Fair Value of Financial Instruments
Losses recognized on assets measured at fair value on a non-recurring basis	40,018	48,080	52,022
MSR, net
Fair Value of Financial Instruments
Losses recognized on assets measured at fair value on a non-recurring basis	931	148
REO, net
Fair Value of Financial Instruments
Losses recognized on assets measured at fair value on a non-recurring basis	$ 3,137	$ 6,677	$ 12,104