Fair Values of Assets and Liabilities (Fair value option-changes in fair value) (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Mortgages Held For Sale
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 18,459	$ 9,224	$ (6,885)	$ 12,913
Automobile Loans
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	(618)	(546)	14	(1,197)
Fair Value, Option, Credit Risk, Gains (Losses) on Assets	468	1,137	1,620	3,715
Securitization Trust Notes Payable
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair Value, Option, Changes in Fair Value, Gain (Loss)	$ 0	$ (101)	$ 0	$ (2,023)