Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets measured at fair value on a recurring basis
Securities available for sale	$ 409,285	$ 422,985
Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	409,285	422,985
Yield maintenance provisions	365	275
Corporate bonds
Assets measured at fair value on a recurring basis
Securities available for sale	1,840	1,525
Corporate bonds | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	1,840	1,525
U.S. Treasury and U.S. government sponsored entities
Assets measured at fair value on a recurring basis
Securities available for sale	28,093	51,310
U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	28,093	51,310
State and political subdivisions
Assets measured at fair value on a recurring basis
Securities available for sale	88,889	94,734
State and political subdivisions | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	88,889	94,734
Mortgage-backed securities - residential
Assets measured at fair value on a recurring basis
Securities available for sale	240,073	222,980
Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	240,073	222,980
Collateralized mortgage obligations
Assets measured at fair value on a recurring basis
Securities available for sale	27,074	28,676
Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	27,074	28,676
Small business administration
Assets measured at fair value on a recurring basis
Securities available for sale	23,112	23,573
Small business administration | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	23,112	23,573
Equity securities
Assets measured at fair value on a recurring basis
Securities available for sale	204	187
Equity securities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	204	187
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	204	187
Yield maintenance provisions	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate bonds | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
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
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | State and political subdivisions | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Small business administration | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	204	187
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	409,071	422,788
Yield maintenance provisions	365	275
Significant Other Observable Inputs (Level 2) | Corporate bonds | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	1,840	1,525
Significant Other Observable Inputs (Level 2) | U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	28,093	51,310
Significant Other Observable Inputs (Level 2) | State and political subdivisions | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	88,889	94,734
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	240,063	222,970
Significant Other Observable Inputs (Level 2) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	27,074	28,676
Significant Other Observable Inputs (Level 2) | Small business administration | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	23,112	23,573
Significant Other Observable Inputs (Level 2) | Equity securities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	10	10
Yield maintenance provisions	0	0
Significant Unobservable Inputs (Level 3) | Corporate bonds | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | U.S. Treasury and U.S. government sponsored entities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | State and political subdivisions | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Mortgage-backed securities - residential | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	10	10
Significant Unobservable Inputs (Level 3) | Collateralized mortgage obligations | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Small business administration | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Significant Unobservable Inputs (Level 3) | Equity securities | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Securities available for sale	0	0
Interest rate swaps | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Derivative assets	365	275
Interest rate swaps | Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Derivative assets	0	0
Interest rate swaps | Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Derivative assets	365	275
Interest rate swaps | Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Assets measured at fair value on a recurring basis
Derivative assets	$ 0	$ 0