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Borrowings (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Sep. 30, 2003
Debt Instrument [Line Items]      
Other borrowings $ 1,734,000 $ 4,004,000  
Subordinated Debt $ 102,633,000 101,584,000  
Trust redeemable preferred securities issued     $ 35,000,000
Tier Two Risk Based Capital   $ 13,400,000  
Next Call Date March 2016    
DebtInstrumentInterestRateTerms 3-month LIBOR plus 295 basis points    
Debt Instrument Basis Spread On Variable Rate 3.48% 3.19%  
Subordinated Capital Note 2006 [Member]      
Debt Instrument [Line Items]      
Subordinated Debt $ 30,000,000    
DebtInstrumentInterestRateTerms three-month LIBOR    
Debt Instrument Basis Spread On Variable Rate 2.16% 181.00%  
Subordinated Capital Note 2006 Fixed Rate [Member]      
Debt Instrument [Line Items]      
Subordinated Debt $ 37,000,000    
DebtInstrumentInterestRateTerms three-month LIBOR plus 1.56%    
Debt Instrument Basis Spread On Variable Rate 2.16% 1.81%  
Federal Home Loan Bank Advances [Member]      
Debt Instrument [Line Items]      
Loans Receivable, Gross, Commercial, Mortgage $ 1,300,000,000 $ 1,200,000,000  
Additional Borrowing Capacity $ 770,600,000 $ 606,600,000  
Weighted average period remaining maturity of FHLB advances 6.3 months 8.8 months  
Interest Payable $ 362,000    
Term Notes      
Debt Instrument [Line Items]      
Other borrowings   $ 1,000,000  
Index Appreciation   1,300,000  
Repurchase agreement      
Debt Instrument [Line Items]      
Interest Payable $ 2,200,000 $ 2,300,000