Loans, Past Due (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Minimum [Member]	Sep. 30, 2014 Loans Considered Non-Accrual [Member]	Dec. 31, 2013 Loans Considered Non-Accrual [Member]	Sep. 30, 2014 Loans Still Accruing [Member]	Dec. 31, 2013 Loans Still Accruing [Member]	Sep. 30, 2014 Mortgages [Member]	Dec. 31, 2013 Mortgages [Member]	Sep. 30, 2014 Home Equity [Member]	Dec. 31, 2013 Home Equity [Member]	Sep. 30, 2014 Commercial [Member]	Dec. 31, 2013 Commercial [Member]	Sep. 30, 2014 Agricultural [Member]	Dec. 31, 2013 Agricultural [Member]	Sep. 30, 2014 Construction [Member]	Dec. 31, 2013 Construction [Member]	Sep. 30, 2014 Residential [Member]	Dec. 31, 2013 Residential [Member]	Sep. 30, 2014 Commercial and Agricultural [Member]	Dec. 31, 2013 Commercial and Agricultural [Member]	Sep. 30, 2014 Consumer [Member]	Dec. 31, 2013 Consumer [Member]	Sep. 30, 2014 Other Commercial Loans [Member]	Dec. 31, 2013 Other Commercial Loans [Member]	Sep. 30, 2014 Other Agricultural Loans [Member]	Dec. 31, 2013 Other Agricultural Loans [Member]	Sep. 30, 2014 State and Political Subdivision Loans [Member]	Dec. 31, 2013 State and Political Subdivision Loans [Member]	Sep. 30, 2014 Commercial and Other Loans [Member]	Dec. 31, 2013 Commercial and Other Loans [Member]
Recorded investment of past due [Abstract]
30 to 59 Days Past Due	$ 1,382	$ 1,207		$ 81	$ 98	$ 1,301	$ 1,109	$ 277	$ 362	$ 505	$ 632	$ 484	$ 88	$ 42	$ 0	$ 0	$ 0					$ 53	$ 96	$ 21	$ 29	$ 0	$ 0	$ 0	$ 0
60 to 89 Days Past Due	272	425		22	164	250	261	196	40	51	2	22	319	0	0	0	0					3	36	0	28	0	0	0	0
90 Days Or Greater	2,789	4,124		2,026	3,427	763	697	807	739	330	229	1,309	3,091	0	0	0	0					0	16	343	49	0	0	0	0
Total Past Due	4,443	5,756		2,129	3,689	2,314	2,067	1,280	1,141	886	863	1,815	3,498	42	0	0	0					56	148	364	106	0	0	0	0
Current	539,312	534,856		4,622	4,408	534,690	530,448	122,104	118,743	63,045	66,354	185,877	189,589	24,154	22,001	4,960	8,937					8,742	9,415	44,781	44,382	11,519	9,541	74,130	65,894
Total Loans	543,755	540,612		6,751	8,097	537,004	532,515	123,384	119,884	63,931	67,217	187,692	193,087	24,196	22,001	4,960	8,937	187,315	187,101	211,888	215,088	8,798	9,563	45,145	44,488	11,519	9,541	74,130	65,894	56,664	54,029
90 Days and Accruing	763	697						257	301	175	51	331	344	0	0	0	0					0	1	0	0	0	0	0	0
Period of past due after which loans considered as non accrual			90 days
Financing receivables on nonaccrual status [Abstract]
Financing receivable nonaccrual status	$ 6,751	$ 8,097						$ 734	$ 508	$ 179	$ 177	$ 5,003	$ 7,247	$ 0	$ 0	$ 0	$ 0					$ 50	$ 15	$ 785	$ 150	$ 0	$ 0	$ 0	$ 0