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
Mar. 31, 2014
Residential Mortgage [Member]
Mar. 31, 2013
Residential Mortgage [Member]
Mar. 31, 2014
Residential Mortgage [Member]
Fair value method
Mar. 31, 2013
Residential Mortgage [Member]
Fair value method
Mar. 31, 2014
Residential Mortgage [Member]
Amortization method
Sep. 30, 2013
Residential Mortgage [Member]
Amortization method
Mar. 31, 2014
Automobile Loan [Member]
Amortization method
Mar. 31, 2013
Automobile Loan [Member]
Amortization method
Mar. 31, 2014
Small Business Association (SBA) Loan [Member]
Mar. 31, 2013
Small Business Association (SBA) Loan [Member]
Summarizes activity relating to loans sold securitized with servicing retained                    
Loans sold with servicing retained                 $ 40,871 $ 26,908
Pretax gains resulting from above loan sales 12,076 [1] 35,569 [1]             4,375 [1] 3,076 [1]
Summarize the changes in MSRs using the fair value method                    
Fair value, beginning of period 34,236 35,202                
Change in fair value during the period due to:                    
Time decay 725 609                
Payoffs 1,915 3,157                
Changes in valuation inputs or assumptions (968) 4,146                
Fair value, end of period $ 30,628 $ 35,582                
Weighted-average life (in years)     4 years 1 month 0 days 3 years 7 months 0 days 6 years 6 months 0 days 4 years 7 months 0 days 3 years 2 months 0 days 4 years 1 month 0 days 4 years 6 months 0 days  
[1] Recorded in mortgage banking income.