Loans, Past Due (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Loans Considered Non-Accrual [Member]	Dec. 31, 2013 Loans Considered Non-Accrual [Member]	Mar. 31, 2014 Loans Still Accruing [Member]	Dec. 31, 2013 Loans Still Accruing [Member]	Mar. 31, 2014 Real Estate Loans [Member] Residential [Member]	Dec. 31, 2013 Real Estate Loans [Member] Residential [Member]	Mar. 31, 2014 Real Estate Loans [Member] Commercial and Agricultural [Member]	Dec. 31, 2013 Real Estate Loans [Member] Commercial and Agricultural [Member]	Mar. 31, 2014 Real Estate Loans [Member] Mortgages [Member]	Dec. 31, 2013 Real Estate Loans [Member] Mortgages [Member]	Mar. 31, 2014 Real Estate Loans [Member] Home Equity [Member]	Dec. 31, 2013 Real Estate Loans [Member] Home Equity [Member]	Mar. 31, 2014 Real Estate Loans [Member] Commercial [Member]	Dec. 31, 2013 Real Estate Loans [Member] Commercial [Member]	Mar. 31, 2014 Real Estate Loans [Member] Agricultural [Member]	Dec. 31, 2013 Real Estate Loans [Member] Agricultural [Member]	Mar. 31, 2014 Real Estate Loans [Member] Construction [Member]	Dec. 31, 2013 Real Estate Loans [Member] Construction [Member]	Mar. 31, 2014 Consumer [Member]	Dec. 31, 2013 Consumer [Member]	Mar. 31, 2014 Commercial and Other Loans [Member]	Dec. 31, 2013 Commercial and Other Loans [Member]	Mar. 31, 2014 Other Agricultural Loans [Member]	Dec. 31, 2013 Other Agricultural Loans [Member]	Mar. 31, 2014 State and Political Subdivision Loans [Member]	Dec. 31, 2013 State and Political Subdivision Loans [Member]	Mar. 31, 2014 Other Commercial Loans [Member]	Dec. 31, 2013 Other Commercial Loans [Member]
Recorded investment of past due [Abstract]
30 to 59 Days Past Due	$ 1,450	$ 1,207		$ 257	$ 98	$ 1,193	$ 1,109					$ 46	$ 362	$ 406	$ 632	$ 825	$ 88	$ 0	$ 0	$ 0	$ 0	$ 71	$ 96			$ 0	$ 0	$ 0	$ 0	$ 102	$ 29
60 to 89 Days Past Due	392	425		174	164	218	261					93	40	84	2	83	319	0	0	0	0	21	36			0	0	0	0	111	28
90 Days Or Greater	4,511	4,124		3,579	3,427	932	697					805	739	104	229	2,999	3,091	0	0	0	0	15	16			0	0	0	0	588	49
Total Past Due	6,353	5,756		4,010	3,689	2,343	2,067					944	1,141	594	863	3,907	3,498	0	0	0	0	107	148			0	0	0	0	801	106
Current	526,870	534,856		4,223	4,408	522,647	530,448					120,053	118,743	64,313	66,354	188,878	189,589	21,245	22,001	3,510	8,937	8,949	9,415			9,455	9,541	65,255	65,894	45,212	44,382
Total Loans	533,223	540,612		8,233	8,097	524,990	532,515	185,904	187,101	214,030	215,088	120,997	119,884	64,907	67,217	192,785	193,087	21,245	22,001	3,510	8,937	9,056	9,563	55,468	54,029	9,455	9,541	65,255	65,894	46,013	44,488
90 Days and Accruing	932	697										262	301	31	51	305	344	0	0	0	0	0	1			0	0	0	0	334	0
Period of past due after which loans considered as non accrual			90 days
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	$ 8,233	$ 8,097										$ 702	$ 508	$ 110	$ 177	$ 7,066	$ 7,247	$ 0	$ 0	$ 0	$ 0	$ 15	$ 15			$ 0	$ 0	$ 0	$ 0	$ 340	$ 150