Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financial Assets
Securities available for sale	$ 387,093	$ 394,312
Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	387,093	394,312
Yield maintenance provisions	1,563	789
Corporate bonds
Financial Assets
Securities available for sale	1,149	1,134
Corporate bonds | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	1,149	1,134
Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	26,476	27,165
Small Business Administration
Financial Assets
Securities available for sale	19,056	19,299
Small Business Administration | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	19,056	19,299
U.S. Treasury and U.S. government sponsored entities
Financial Assets
Securities available for sale	10,294	11,106
U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	10,294	11,106
State and political subdivisions
Financial Assets
Securities available for sale	139,095	138,723
State and political subdivisions | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	139,095	138,723
Mortgage-backed securities - residential
Financial Assets
Securities available for sale	190,734	196,587
Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	190,734	196,587
Equity securities
Financial Assets
Securities available for sale	289	298
Equity securities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	289	298
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	289	298
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	289	298
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	386,790	393,999
Yield maintenance provisions	1,563	789
Significant Other Observable Inputs (Level 2) | Corporate bonds | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	1,149	1,134
Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	26,476	27,165
Significant Other Observable Inputs (Level 2) | Small Business Administration | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	19,056	19,299
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	10,294	11,106
Significant Other Observable Inputs (Level 2) | State and political subdivisions | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	139,095	138,723
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	190,720	196,572
Significant Other Observable Inputs (Level 2) | Equity securities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	14	15
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	14	15
Significant Unobservable Inputs (Level 3) | Equity securities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	0	0
Interest rate swaps | Fair Value, Measurements, Recurring
Financial Liabilities
Derivative liabilities	1,563	789
Interest rate swaps | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial Liabilities
Derivative liabilities	0	0
Interest rate swaps | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Financial Liabilities
Derivative liabilities	1,563	789
Interest rate swaps | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial Liabilities
Derivative liabilities	$ 0	$ 0