Quarterly report pursuant to Section 13 or 15(d)

Fair Values of Assets and Liabilities (Fair value option-changes in fair value) (Details 4)

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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, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Mortgages Held For Sale
       
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ 9,224 $ 5,823 $ 12,913 $ 13,725
Automobile Loans
       
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) (546) (3,695) (1,197) (5,079)
Fair Value, Option, Credit Risk, Gains (Losses) on Assets 1,137 2,498 3,715 4,780
Securitization Trust Notes Payable
       
Fair Value, Option, Quantitative Disclosures [Line Items]        
Fair Value, Option, Changes in Fair Value, Gain (Loss) $ (101) $ (2,485) $ (2,023) $ (6,102)