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Loans (Servicing Assets) (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Financing Receivable, Impaired [Line Items]      
Loans sold and serviced but owned by outside investors $ 137,800 $ 118,100  
Servicing assets 2,086 1,389 $ 753
Unamortized discount amount $ 1,282 $ 854  
Percentage of loan portfolio secured by real estate 96.00% 96.00%  
SBA Servicing Assets      
Financing Receivable, Impaired [Line Items]      
Servicing assets $ 779 $ 515  
Discount rate used to determine fair value of mortgage servicing assets 15.00%    
SBA Servicing Assets | Minimum      
Financing Receivable, Impaired [Line Items]      
Interest strip multiples range used to determine fair value 2.08%    
Constant prepayment speeds range used to determine fair value 15.00%    
SBA Servicing Assets | Maximum      
Financing Receivable, Impaired [Line Items]      
Interest strip multiples range used to determine fair value 3.80%    
Constant prepayment speeds range used to determine fair value 18.00%    
Mortgage Servicing Assets      
Financing Receivable, Impaired [Line Items]      
Servicing assets $ 1,307 $ 874  
Discount rate used to determine fair value of mortgage servicing assets 12.00%    
Period used to determine the fair value of mortgage servicing assets 7 years