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Loans and Allowance for Loan and Lease Losses - Additional Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Accounts Notes And Loans Receivable [Line Items]      
Net deferred origination and factoring fees $ 951,000   $ 1,218,000
Pledged loans 263,680,000   280,289,000
Loans transferred to loans held for sale 2,881,000 $ 0  
Loans transferred to loans held for sale, at fair value 2,805,000    
Recorded investments in troubled debt restructurings 6,232,000   1,383,000
Factored receivables      
Accounts Notes And Loans Receivable [Line Items]      
Customer reserves 21,293,000   $ 21,188,000
Other non interest income      
Accounts Notes And Loans Receivable [Line Items]      
Decline in fair value of loans held sale $ 76,000