Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Financial Assets    
Securities available for sale $ 394,312 $ 389,829
Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 394,312 389,829
Loan yield maintenance provisions 789 638
Corporate bonds    
Financial Assets    
Securities available for sale 1,134 931
Corporate bonds | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 1,134 931
Collateralized mortgage obligations    
Financial Assets    
Securities available for sale 27,165 25,175
Collateralized mortgage obligations | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 27,165 25,175
Small Business Administration    
Financial Assets    
Securities available for sale 19,299 22,419
Small Business Administration | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 19,299 22,419
U.S. Treasury and U.S. government sponsored entities    
Financial Assets    
Securities available for sale 11,106 24,821
U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 11,106 24,821
State and political subdivisions    
Financial Assets    
Securities available for sale 138,723 91,881
State and political subdivisions | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 138,723 91,881
Mortgage-backed securities - residential    
Financial Assets    
Securities available for sale 196,587 224,362
Mortgage-backed securities - residential | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 196,587 224,362
Equity securities    
Financial Assets    
Securities available for sale 298 240
Equity securities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 298 240
Interest rate swaps | Fair Value, Measurements, Recurring    
Financial Liabilities    
Derivative liabilities 789 638
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 298 240
Loan yield maintenance provisions 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small Business Administration | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | State and political subdivisions | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 298 240
Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps | Fair Value, Measurements, Recurring    
Financial Liabilities    
Derivative liabilities 0 0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 393,999 389,579
Loan yield maintenance provisions 789 638
Significant Other Observable Inputs (Level 2) | Corporate bonds | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 1,134 931
Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 27,165 25,175
Significant Other Observable Inputs (Level 2) | Small Business Administration | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 19,299 22,419
Significant Other Observable Inputs (Level 2) | U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 11,106 24,821
Significant Other Observable Inputs (Level 2) | State and political subdivisions | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 138,723 91,881
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 196,572 224,352
Significant Other Observable Inputs (Level 2) | Equity securities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Other Observable Inputs (Level 2) | Interest rate swaps | Fair Value, Measurements, Recurring    
Financial Liabilities    
Derivative liabilities 789 638
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 15 10
Loan yield maintenance provisions 0 0
Significant Unobservable Inputs (Level 3) | Corporate bonds | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | Small Business Administration | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | State and political subdivisions | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 15 10
Significant Unobservable Inputs (Level 3) | Equity securities | Fair Value, Measurements, Recurring    
Financial Assets    
Securities available for sale 0 0
Significant Unobservable Inputs (Level 3) | Interest rate swaps | Fair Value, Measurements, Recurring    
Financial Liabilities    
Derivative liabilities $ 0 $ 0