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Allowance for Loan Losses (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period $ 9,921 $ 9,623
Charge-offs (3,582) (271)
Recoveries 81 87
Provision (Credit) 3,100 250
Balance at end of period 9,520 9,689
Commercial [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period 4,244 3,262
Charge-offs (3,339) (121)
Recoveries 7 6
Provision (Credit) 2,655 10
Balance at end of period 3,567 3,157
Commercial loans secured by real estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period 3,449 3,902
Charge-offs 0 0
Recoveries 28 42
Provision (Credit) 229 143
Balance at end of period 3,706 4,087
Real estate — mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period 1,173 1,310
Charge-offs (38) (103)
Recoveries 42 30
Provision (Credit) (20) 67
Balance at end of period 1,157 1,304
Consumer [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period 151 190
Charge-offs (205) (47)
Recoveries 4 9
Provision (Credit) 195 39
Balance at end of period 145 191
Allocation for general risk [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Balance at beginning of period 904 959
Charge-offs 0 0
Recoveries 0 0
Provision (Credit) 41 (9)
Balance at end of period $ 945 $ 950