Quarterly report pursuant to Section 13 or 15(d)

Loans sales and securitizations (Details 1)

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Loans sales and securitizations (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2012
Residential Mortgage [Member]
Dec. 31, 2011
Residential Mortgage [Member]
Jun. 30, 2012
Residential Mortgage [Member]
Jun. 30, 2011
Residential Mortgage [Member]
Jun. 30, 2012
Residential Mortgage [Member]
Jun. 30, 2011
Residential Mortgage [Member]
Jun. 30, 2012
Automobile Loan [Member]
Jun. 30, 2011
Automobile Loan [Member]
Jun. 30, 2012
Automobile Loan [Member]
Jun. 30, 2011
Automobile Loan [Member]
Summarize the changes in servicing rights using the amortization method                    
Carrying value, beginning of year     $ 85,895 $ 83,352 $ 72,434 $ 70,516 $ 30,780 $ 69 $ 13,377 $ 97
New servicing assets created     8,069 4,525 18,356 19,978 0 0 19,883 0
Impairment charge/(recovery)     (6,665) 0 893 0        
Amortization and other     (4,063) (3,135) (8,447) (5,752) (4,043) (20) (6,523) (48)
Carrying value, end of period     83,236 84,742 83,236 84,742 26,737 49 26,737 49
Fair value, end of period     83,320 95,829 83,320 95,829 27,596 159 27,596 159
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 19.30% 20.11%                
Constant pre-payment rate, 10% adverse change (3,060) (4,720)                
Constant pre-payment rate, 20% adverse change (6,025) (9,321)                
Spread over forward interest rate swap rates, actual 12.29% 6.50%                
Spread over forward interest rate swap rates, 10% adverse change (1,641) (1,511)                
Spread over forward interest rate swap rates, 20% adverse change $ (3,282) $ (3,023)