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Allowance for Loan Losses and Reserve for Unfunded Loan Commitments (Allowance for Credit Losses on Financing Receivables on Basis of Impairment Method) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]        
Loans and Leases Receivable, Allowance, Total $ 12,634 $ 12,759 $ 12,181 $ 12,551
Total loans 873,766 875,844    
Small Business Administration Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Individually evaluated for impairment 567 705    
Allowance for loan losses, Collectively evaluated for impairment 1,146 1,256    
Loans and Leases Receivable, Allowance, Total 1,713 1,961 1,873 1,883
Loan, Individually evaluated for impairment 1,655 1,907    
Loan, Collectively evaluated for impairment 37,208 37,486    
Total loans 38,863 39,393    
Small Business Administration, 504 Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Collectively evaluated for impairment 598 741    
Loans and Leases Receivable, Allowance, Total 598 741 1,162 1,337
Loan, Individually evaluated for impairment 513 2,226    
Loan, Collectively evaluated for impairment 26,969 27,127    
Total loans 27,482 29,353    
Commercial Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Individually evaluated for impairment 151 137    
Allowance for loan losses, Collectively evaluated for impairment 6,160 6,172    
Loans and Leases Receivable, Allowance, Total 6,311 6,309 5,624 6,270
Loan, Individually evaluated for impairment 1,743 3,040    
Loan, Collectively evaluated for impairment 465,523 462,478    
Total loans 467,266 465,518    
Commercial Other Receivable [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Total loans 50,276 49,332    
Commercial Real Estate Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Total loans 390,345 391,071    
Commercial Real Estate Construction Financing Receivable [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Total loans 26,645 25,115    
Residential Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Collectively evaluated for impairment 2,892 2,769    
Loans and Leases Receivable, Allowance, Total 2,892 2,769 2,341 2,289
Loan, Collectively evaluated for impairment 260,957 264,523    
Total loans 260,957 264,523    
Consumer Portfolio Segment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Collectively evaluated for impairment 836 817    
Loans and Leases Receivable, Allowance, Total 836 817 710 667
Loan, Collectively evaluated for impairment 79,198 77,057    
Total loans 79,198 77,057    
Consumer Home Equity Line Financing Receivable [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Total loans 44,573 45,042    
Consumer Other Financing Receivable [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Total loans 34,625 32,015    
Unallocated Financing Receivables [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Collectively evaluated for impairment 284 162    
Loans and Leases Receivable, Allowance, Total 284 162 $ 471 $ 105
Loans Held for Investment [Member]        
Financing Receivable, Allowance for Credit Losses [Line Items]        
Allowance for loan losses, Individually evaluated for impairment 718 842    
Allowance for loan losses, Collectively evaluated for impairment 11,916 11,917    
Loans and Leases Receivable, Allowance, Total 12,634 12,759    
Loan, Individually evaluated for impairment 3,911 7,173    
Loan, Collectively evaluated for impairment 869,855 868,671    
Total loans $ 873,766 $ 875,844