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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Financing Receivable, Impaired [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment $ 2,855 $ 8,632  
Impaired Financing Receivable, with Related Allowance, Recorded Investment 6,373 2,973  
Impaired Financing Receivable, Recorded Investment 9,228 11,605  
Unpaid Principal Balance, With no related allowance recorded 4,826 8,799  
Unpaid Principal Balance, With an allowance recorded 6,446 3,837  
Unpaid Principal Balance, Total 11,272 12,636  
Associated Allowance 1,613 293  
Average Recorded Investment, Total 9,015 7,725 $ 10,580
Interest Income Recognized, Total 532 508 241
Residential Real Estate Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 168 225  
Impaired Financing Receivable, Recorded Investment 168 225  
Unpaid Principal Balance, With no related allowance recorded 173 233  
Unpaid Principal Balance, Total 173 233  
Associated Allowance 0 0  
Average Recorded Investment, Total 159 233 252
Interest Income Recognized, Total 4 5 5
Commercial Real Estate Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 2,644 8,407  
Impaired Financing Receivable, with Related Allowance, Recorded Investment 6,373 2,973  
Impaired Financing Receivable, Recorded Investment 9,017 11,380  
Unpaid Principal Balance, With no related allowance recorded 4,610 8,566  
Unpaid Principal Balance, With an allowance recorded 6,446 3,837  
Unpaid Principal Balance, Total 11,056 12,403  
Associated Allowance 1,613 293  
Average Recorded Investment, Total 8,847 7,492 10,328
Interest Income Recognized, Total 526 503 236
Commercial, financial and agricultural loans [Member]      
Financing Receivable, Impaired [Line Items]      
Impaired Financing Receivable, with No Related Allowance, Recorded Investment 43    
Impaired Financing Receivable, Recorded Investment 43    
Unpaid Principal Balance, With no related allowance recorded 43    
Unpaid Principal Balance, Total 43    
Associated Allowance 0    
Average Recorded Investment, Total 9 0 0
Interest Income Recognized, Total $ 2 $ 0 $ 0