Fair Value Measurements (Details) (Recurring [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Financial assets and liabilities measured at fair value on a recurring basis [Abstract]
U.S. Treasury	$ 2,053	$ 2,073
U.S. Government agencies and corporations	137,638	129,564
State and political subdivisions	33,583	36,779
Mortgage-backed Securities	4,072	4,569
Corporate debt securities	11,935	14,575
Other securities	2,259	2,255
Total securities available for sale	191,540	189,815
Assets [Abstract]
Impaired loans net of valuation allowance	722	928
Other real estate owned net of valuation allowance	1,094	1,435
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets and liabilities measured at fair value on a recurring basis [Abstract]
U.S. Treasury	0	0
U.S. Government agencies and corporations	0	0
State and political subdivisions	0	0
Mortgage-backed Securities	0	0
Corporate debt securities	0	0
Other securities	0	0
Total securities available for sale	0	0
Assets [Abstract]
Impaired loans net of valuation allowance	0	0
Other real estate owned net of valuation allowance	0	0
Significant Other Observable Inputs (Level 2) [Member]
Financial assets and liabilities measured at fair value on a recurring basis [Abstract]
U.S. Treasury	2,053	2,073
U.S. Government agencies and corporations	137,638	129,564
State and political subdivisions	33,583	36,779
Mortgage-backed Securities	4,072	4,569
Corporate debt securities	11,935	14,575
Other securities	2,259	2,255
Total securities available for sale	191,540	189,815
Assets [Abstract]
Impaired loans net of valuation allowance	0	0
Other real estate owned net of valuation allowance	0	0
Significant Unobservable Inputs (Level 3) [Member]
Financial assets and liabilities measured at fair value on a recurring basis [Abstract]
U.S. Treasury	0	0
U.S. Government agencies and corporations	0	0
State and political subdivisions	0	0
Mortgage-backed Securities	0	0
Corporate debt securities	0	0
Other securities	0	0
Total securities available for sale	0	0
Assets [Abstract]
Impaired loans net of valuation allowance	722	928
Other real estate owned net of valuation allowance	$ 1,094	$ 1,435