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Commercial Mortgage Residual Interests (Sensitivity Analysis Table) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Fair value at 25% discount rate
Dec. 31, 2013
Fair value at 27% discount rate
Dec. 31, 2013
Fair value of 1% increases above the CPR Index
Dec. 31, 2013
Fair value of 2% increases above the CPR Index
Dec. 31, 2013
Fair value 2% adverse change
Dec. 31, 2013
Fair value 3% adverse change
Dec. 31, 2013
Fair value of Prime/LIBOR spread contracting 25 basis points
Dec. 31, 2013
Fair value of Prime/LIBOR spread contracting 50 basis points
Dec. 31, 2013
Minimum
Dec. 31, 2013
Maximum
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]                        
Carrying amount of retained interests $ 11,721 $ 13,096                    
Discount rate assumption     9,859 9,208                
Discount rate assumption, percent                     25.00% 27.00%
Prepayment speed assumption         11,719 11,717            
Prepayment speed assumption, percent                     1.00% 2.00%
Expected credit losses             11,502 11,404        
Expected credit losses, percent                     2.00% 3.00%
Yield Assumptions                 $ 11,999 $ 12,267    
Yield Assumptions, basis point                     0.25% 0.50%