Quarterly report pursuant to Section 13 or 15(d)

Loans sales and securitizations (Details)

v3.2.0.727
Loans sales and securitizations (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Residential Mortgage [Member]        
Summarizes activity relating to loans sold securitized with servicing retained        
Loans sold with servicing retained $ 938,412,000 $ 566,471,000 $ 1,569,096,000 $ 1,048,308,000
Pretax gains resulting from above loan sales [1] 27,471,000 14,996,000 42,334,000 27,072,000
Summarize the changes in MSRs using the fair value method        
Fair value, beginning of period 20,455,000 30,628,000 22,786,000 34,236,000
Change in fair value during the period due to:        
Time decay 332,000 656,000 671,000 1,381,000
Payoffs 997,000 1,611,000 1,815,000 3,525,000
Changes in valuation inputs or assumptions 1,555,000 (1,614,000) 381,000 (2,583,000)
Fair value, end of period $ 20,681,000 $ 26,747,000 $ 20,681,000 $ 26,747,000
Residential Mortgage [Member] | Fair value method        
Change in fair value during the period due to:        
Weighted-average life (in years) 5 years 1 month 3 years 11 months 5 years 1 month 3 years 11 months
Residential Mortgage [Member] | Amortization method        
Change in fair value during the period due to:        
Weighted-average life (in years) 6 years 6 months 5 years 11 months 6 years 6 months 5 years 11 months
Automobile Loan [Member]        
Summarizes activity relating to loans sold securitized with servicing retained        
Loans sold with servicing retained $ 750,000,000 $ 0   $ 0
Pretax gains resulting from above loan sales $ 5,333,000 $ 0 $ 5,333,000 $ 0
Automobile Loan [Member] | Amortization method        
Change in fair value during the period due to:        
Weighted-average life (in years) 3 years 2 months 3 years 3 years 2 months 3 years
Small Business Association (SBA) Loan [Member]        
Summarizes activity relating to loans sold securitized with servicing retained        
Loans sold with servicing retained $ 53,534,000 $ 45,229,000 $ 95,935,000 $ 86,101,000
Pretax gains resulting from above loan sales [1] $ 4,696,000 $ 5,396,000 $ 8,270,000 $ 9,772,000
Change in fair value during the period due to:        
Weighted-average life (in years) 3 years 4 months 3 years 6 months    
[1] Recorded in mortgage banking income.