Loans and Allowance for Loan Losses (Composition of Loan Portfolio, Excluding Residential Loans Held for Sale) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Deferred loan fees net of costs $ (528) $ (572)  
Loans 1,772,610 1,580,402 1,563,866
Residential real estate loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gross loans 585,996 570,391  
Loans 585,468 569,819 572,173
Commercial real estate loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gross loans 640,661 541,099  
Loans 640,661 541,099 506,231
Commercial loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gross loans 257,515 179,203  
Loans 257,515 179,203 190,454
Home equity loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gross loans 271,709 272,630  
Loans 271,709 272,630 278,375
Consumer loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Gross loans 17,257 17,651  
Loans $ 17,257 $ 17,651 $ 16,633