Annual report pursuant to Section 13 and 15(d)

Fair Values of Assets and Liabilities (Fair value option) (Details 3)

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Fair Values of Assets and Liabilities (Fair value option) (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Mortgages Held For Sale
   
Fair Value, Option, Quantitative Disclosures [Line Items]    
Mortgages Held-for-sale, Fair Value Disclosure $ 452,949 $ 343,588
Mortgages Held For Sale, Unpaid Principal 438,254 328,641
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables 14,695 14,947
Automobile Loans
   
Fair Value, Option, Quantitative Disclosures [Line Items]    
Loans Receivable, Fair Value Disclosure 142,762 296,250
Loans Receivable, Unpaid Principal 140,916 293,174
Fair Value, Option, Aggregate Differences, Loans and Long-term Receivables 1,846 3,076
Securitization Trust Notes Payable
   
Fair Value, Option, Quantitative Disclosures [Line Items]    
Long-term Debt, Fair Value 0 123,039
Long-term Debt, Unpaid Principal 0 121,016
Fair Value, Option, Aggregate Differences, Long-term Debt Instruments $ 0 $ 2,023