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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 | 12 Months Ended | 3 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||
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Jun. 30, 2013
Fair value method
Residential Mortgage [Member]
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Dec. 31, 2012
Fair value method
Residential Mortgage [Member]
|
Jun. 30, 2013
Amortization method
Residential Mortgage [Member]
|
Dec. 31, 2012
Amortization method
Residential Mortgage [Member]
|
Jun. 30, 2013
Amortization method
Automobile Loan [Member]
|
Dec. 31, 2012
Amortization method
Automobile Loan [Member]
|
Jun. 30, 2013
Residential Mortgage [Member]
|
Jun. 30, 2012
Residential Mortgage [Member]
|
Jun. 30, 2013
Residential Mortgage [Member]
|
Jun. 30, 2012
Residential Mortgage [Member]
|
Jun. 30, 2013
Residential Mortgage [Member]
Fair value method
|
Jun. 30, 2012
Residential Mortgage [Member]
Fair value method
|
Jun. 30, 2013
Residential Mortgage [Member]
Fair value method
|
Jun. 30, 2012
Residential Mortgage [Member]
Fair value method
|
Jun. 30, 2013
Residential Mortgage [Member]
Amortization method
|
Jun. 30, 2012
Residential Mortgage [Member]
Amortization method
|
Jun. 30, 2013
Residential Mortgage [Member]
Amortization method
|
Jun. 30, 2012
Residential Mortgage [Member]
Amortization method
|
Jun. 30, 2013
Automobile Loan [Member]
|
Jun. 30, 2012
Automobile Loan [Member]
|
Jun. 30, 2013
Automobile Loan [Member]
|
Jun. 30, 2012
Automobile Loan [Member]
|
Jun. 30, 2013
Automobile Loan [Member]
Amortization method
|
Jun. 30, 2012
Automobile Loan [Member]
Amortization method
|
Jun. 30, 2013
Automobile Loan [Member]
Amortization method
|
Jun. 30, 2012
Automobile Loan [Member]
Amortization method
|
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| Summarize the changes in servicing rights using the amortization method | ||||||||||||||||||||||||||
| Carrying value, beginning of year | $ 104,345 | $ 85,895 | $ 85,545 | $ 72,434 | $ 30,436 | $ 30,780 | $ 35,606 | $ 13,377 | ||||||||||||||||||
| New servicing assets created | 9,465 | 8,069 | 18,750 | 18,356 | 0 | 0 | 0 | 19,883 | ||||||||||||||||||
| Impairment charge/(recovery) | 7,940 | (6,665) | 21,591 | 893 | ||||||||||||||||||||||
| Amortization and other | (3,772) | (4,063) | (7,908) | (8,447) | (4,748) | (4,043) | (9,918) | (6,523) | ||||||||||||||||||
| Carrying value, end of period | 117,978 | 83,236 | 117,978 | 83,236 | 25,688 | 26,737 | 25,688 | 26,737 | ||||||||||||||||||
| Fair value, end of period | 129,050 | 83,320 | 129,050 | 83,320 | 25,742 | 27,596 | 25,742 | 27,596 | ||||||||||||||||||
| Weighted-average life (in years) | 3 years 2 months 0 days | 3 years 2 months 0 days | 3 years 2 months 0 days | 3 years 2 months 0 days | 3 years 4 months 0 days | 3 years 4 months 0 days | 3 years 4 months 0 days | 3 years 4 months 0 days | 4 years 3 months 0 days | 4 years 3 months 0 days | 4 years 3 months 0 days | 4 years 3 months 0 days | ||||||||||||||
| 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 | 11.80% | 19.52% | 7.40% | 15.45% | 15.10% | 13.80% | ||||||||||||||||||||
| Constant pre-payment rate, 10% adverse change | (2,280) | (2,608) | (6,892) | (4,936) | (795) | (880) | ||||||||||||||||||||
| Constant pre-payment rate, 20% adverse change | (4,436) | (5,051) | (13,474) | (9,451) | (1,602) | (1,771) | ||||||||||||||||||||
| Spread over forward interest rate swap rates, actual | 12.33% | 12.88% | 9.15% | 9.40% | 5.00% | 5.00% | ||||||||||||||||||||
| Spread over forward interest rate swap rates, 10% adverse change | (1,560) | (1,290) | (5,175) | (3,060) | (13) | (18) | ||||||||||||||||||||
| Spread over forward interest rate swap rates, 20% adverse change | $ (3,120) | $ (2,580) | $ (10,350) | $ (6,119) | $ (27) | $ (36) | ||||||||||||||||||||