Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012 Recurring [Member]	Dec. 31, 2011 Recurring [Member]	Dec. 31, 2012 Recurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2011 Recurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2012 Recurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2011 Recurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2012 Recurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Recurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2012 Nonrecurring [Member]	Dec. 31, 2011 Nonrecurring [Member]	Dec. 31, 2012 Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2011 Nonrecurring [Member] Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]	Dec. 31, 2012 Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2011 Nonrecurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Dec. 31, 2012 Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2011 Nonrecurring [Member] Significant Unobservable Inputs (Level 3) [Member]
Financial assets and liabilities measured at fair value on a recurring basis [Abstract]
U.S. Treasury		$ 2,073	$ 2,150	$ 0	$ 0	$ 2,073	$ 2,150	$ 0	$ 0
U.S. Government agencies and corporations		129,564	96,003	0	0	129,564	96,003	0	0
State and political subdivisions		36,779	49,122	0	0	36,779	49,122	0	0
Mortgage-backed Securities		4,569	7,725	0	0	4,569	7,725	0	0
Corporate debt securities		14,575	16,077	0	0	14,575	16,077	0	0
Other securities		2,255	2,175	0	0	2,255	2,175	0	0
Total securities available for sale		189,815	173,252	0	0	189,815	173,252	0	0
Assets [Abstract]
Impaired loans net of valuation allowance										928	5,968	0	0	0	0	928	5,968
Other real estate owned net of valuation allowance										$ 1,435	$ 1,489	$ 0	$ 0	$ 0	$ 0	$ 1,435	$ 1,489
Period that other borrowed funds are generally repaid from transaction date	120 days