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Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financial Assets
Securities available for sale	$ 369,995	$ 394,312
Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	369,995	394,312
Loan yield maintenance provisions	685	789
Corporate bonds
Financial Assets
Securities available for sale	1,339	1,134
Corporate bonds | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	1,339	1,134
Collateralized mortgage obligations
Financial Assets
Securities available for sale	20,693	27,165
Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	20,693	27,165
Small Business Administration
Financial Assets
Securities available for sale	16,706	19,299
Small Business Administration | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	16,706	19,299
U.S. Treasury and U.S. government sponsored entities
Financial Assets
Securities available for sale	5,921	11,106
U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	5,921	11,106
State and political subdivisions
Financial Assets
Securities available for sale	155,303	138,723
State and political subdivisions | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	155,303	138,723
Mortgage-backed securities - residential
Financial Assets
Securities available for sale	169,682	196,587
Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	169,682	196,587
Equity securities
Financial Assets
Securities available for sale	351	298
Equity securities | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	351	298
Interest rate swaps | Fair Value, Measurements, Recurring
Financial Liabilities
Derivative liabilities	685	789
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	351	298
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	351	298
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	369,632	393,999
Loan yield maintenance provisions	685	789
Significant Other Observable Inputs (Level 2) | Corporate bonds | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	1,339	1,134
Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	20,693	27,165
Significant Other Observable Inputs (Level 2) | Small Business Administration | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	16,706	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	5,921	11,106
Significant Other Observable Inputs (Level 2) | State and political subdivisions | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	155,303	138,723
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	169,670	196,572
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	685	789
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Financial Assets
Securities available for sale	12	15
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	12	15
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

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