Annual report pursuant to Section 13 and 15(d)

Loans sales and securitizations (Details 1)

v2.4.0.6
Loans sales and securitizations (Details 1) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Fair value method | Residential Mortgage [Member]
    
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]    
Constant pre-payment rate, actual 19.52% 20.11%
Constant pre-payment rate, 10% adverse change $ (2,608) $ (4,720)
Constant pre-payment rate, 20% adverse change (5,051) (9,321)
Spread over forward interest rate swap rates, actual 12.88% 6.50%
Spread over forward interest rate swap rates, 10% adverse change (1,290) (1,511)
Spread over forward interest rate swap rates, 20% adverse change (2,580) (3,023)
Amortization method | Residential Mortgage [Member]
    
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]    
Constant pre-payment rate, actual 15.45% 15.92%
Constant pre-payment rate, 10% adverse change (4,936) (3,679)
Constant pre-payment rate, 20% adverse change (9,451) (7,160)
Spread over forward interest rate swap rates, actual 9.40% 9.53%
Spread over forward interest rate swap rates, 10% adverse change (3,060) (2,605)
Spread over forward interest rate swap rates, 20% adverse change (6,119) (5,211)
Amortization method | Automobile Loan [Member]
    
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]    
Constant pre-payment rate, actual 13.80% 15.60%
Constant pre-payment rate, 10% adverse change (880) (362)
Constant pre-payment rate, 20% adverse change (1,771) (708)
Spread over forward interest rate swap rates, actual 5.00%  
Spread over forward interest rate swap rates, 10% adverse change (18)  
Spread over forward interest rate swap rates, 20% adverse change (36)  
Residential Mortgage [Member]
    
Summarize the changes in servicing rights using the amortization method    
Carrying value, beginning of year 72,434 70,516
New servicing assets created 36,123 32,505
Impairment charge/(recovery) (4,374) (17,649)
Amortization and other (18,638) (12,938)
Carrying value, end of period 85,545 72,434
Fair value, end of period 85,612 72,586
Residential Mortgage [Member] | Fair value method
    
Summarize the changes in servicing rights using the amortization method    
Weighted-average life (in years) 3 years 2 months 0 days 3 years 3 months 0 days
Residential Mortgage [Member] | Amortization method
    
Summarize the changes in servicing rights using the amortization method    
Weighted-average life (in years) 3 years 4 months 0 days 3 years 5 months 0 days
Automobile Loan [Member]
    
Summarize the changes in servicing rights using the amortization method    
Carrying value, beginning of year 13,377 97
New servicing assets created 38,043 16,039
Impairment charge/(recovery) (75) 0
Amortization and other (15,739) (2,759)
Carrying value, end of period 35,606 13,377
Fair value, end of period $ 36,470 $ 13,428
Automobile Loan [Member] | Amortization method
    
Summarize the changes in servicing rights using the amortization method    
Weighted-average life (in years) 4 years 3 months 0 days 4 years 8 months 0 days