Quarterly report pursuant to Section 13 or 15(d)

Loans sales and securitizations (Details)

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Loans sales and securitizations (Details) (USD $)
In Thousands, unless otherwise specified
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
Jun. 30, 2014
Residential Mortgage [Member]
Jun. 30, 2013
Residential Mortgage [Member]
Jun. 30, 2014
Residential Mortgage [Member]
Jun. 30, 2013
Residential Mortgage [Member]
Jun. 30, 2014
Residential Mortgage [Member]
Fair value method
Jun. 30, 2013
Residential Mortgage [Member]
Fair value method
Jun. 30, 2014
Residential Mortgage [Member]
Fair value method
Jun. 30, 2013
Residential Mortgage [Member]
Fair value method
Jun. 30, 2014
Residential Mortgage [Member]
Amortization method
Sep. 30, 2013
Residential Mortgage [Member]
Amortization method
Jun. 30, 2014
Residential Mortgage [Member]
Amortization method
Jun. 30, 2013
Residential Mortgage [Member]
Amortization method
Jun. 30, 2014
Automobile Loan [Member]
Amortization method
Jun. 30, 2013
Automobile Loan [Member]
Amortization method
Jun. 30, 2014
Automobile Loan [Member]
Amortization method
Jun. 30, 2013
Automobile Loan [Member]
Amortization method
Jun. 30, 2014
Small Business Association (SBA) Loan [Member]
Jun. 30, 2013
Small Business Association (SBA) Loan [Member]
Jun. 30, 2014
Small Business Association (SBA) Loan [Member]
Jun. 30, 2013
Small Business Association (SBA) Loan [Member]
Summarizes activity relating to loans sold securitized with servicing retained                                        
Loans sold with servicing retained                                 $ 45,229 $ 39,378 $ 86,101 $ 66,286
Pretax gains resulting from above loan sales 14,996 [1] 32,727 [1] 27,072 [1] 68,295 [1]                         5,396 [1] 4,265 [1] 9,772 [1] 7,341 [1]
Summarize the changes in MSRs using the fair value method                                        
Fair value, beginning of period 30,628 35,582 34,236 35,202                                
Change in fair value during the period due to:                                        
Time decay 656 625 1,381 1,234                                
Payoffs 1,611 3,601 3,525 6,759                                
Changes in valuation inputs or assumptions (1,614) 6,188 (2,583) 10,335                                
Fair value, end of period $ 26,747 $ 37,544 $ 26,747 $ 37,544                                
Weighted-average life (in years)         3 years 11 months 0 days 4 years 2 months 0 days 3 years 11 months 0 days 4 years 2 months 0 days 5 years 11 months 0 days 6 years 5 months 0 days 5 years 11 months 0 days 6 years 5 months 0 days 3 years 0 months 0 days 3 years 10 months 0 days 3 years 0 months 0 days 3 years 10 months 0 days 3 years 6 months 0 days      
[1] Recorded in mortgage banking income.