Loans, Impaired Loans (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Recorded Investment
With no related allowance recorded	$ 22,904,000		$ 22,904,000		$ 27,702,000
With an allowance recorded	5,147,000		5,147,000		5,673,000
Total	28,051,000		28,051,000		33,375,000
Unpaid Principal Balance
With no related allowance recorded	27,295,000		27,295,000		35,882,000
With an allowance recorded	5,309,000		5,309,000		6,229,000
Total	32,604,000		32,604,000		42,111,000
Related Allowance
With an allowance recorded	372,000		372,000		817,000
Average Recorded Investment
With no related allowance recorded	25,350,000	$ 29,966,000	26,414,000	$ 31,136,000
With an allowance recorded	5,184,000	6,050,000	5,191,000	5,677,000
Total	30,534,000	36,016,000	31,605,000	36,813,000
Interest Income Recognized
With no related allowance recorded	465,000	465,000	2,992,000	987,000
With an allowance recorded	45,000	61,000	131,000	154,000
Total	510,000	526,000	3,123,000	1,141,000
Cash basis interest expense on impaired loans			96,000	0
Commercial and Industrial [Member]
Recorded Investment
With no related allowance recorded	1,753,000		1,753,000		1,092,000
With an allowance recorded	378,000		378,000		401,000
Total	2,131,000		2,131,000		1,493,000
Unpaid Principal Balance
With no related allowance recorded	2,059,000		2,059,000		2,077,000
With an allowance recorded	378,000		378,000		406,000
Total	2,437,000		2,437,000		2,483,000
Related Allowance
With an allowance recorded	9,000		9,000		10,000
Average Recorded Investment
With no related allowance recorded	1,609,000	2,053,000	1,437,000	2,085,000
With an allowance recorded	382,000	393,000	389,000	274,000
Total	1,991,000	2,446,000	1,826,000	2,359,000
Interest Income Recognized
With no related allowance recorded	34,000	38,000	175,000	76,000
With an allowance recorded	6,000	6,000	17,000	17,000
Total	40,000	44,000	192,000	93,000
Commercial Secured By Real Estate [Member]
Recorded Investment
With no related allowance recorded	16,615,000		16,615,000		21,822,000
With an allowance recorded	3,979,000		3,979,000		4,184,000
Total	20,594,000		20,594,000		26,006,000
Unpaid Principal Balance
With no related allowance recorded	19,095,000		19,095,000		26,715,000
With an allowance recorded	4,042,000		4,042,000		4,538,000
Total	23,137,000		23,137,000		31,253,000
Related Allowance
With an allowance recorded	295,000		295,000		717,000
Average Recorded Investment
With no related allowance recorded	18,841,000	22,768,000	19,941,000	23,549,000
With an allowance recorded	3,994,000	4,298,000	3,977,000	4,209,000
Total	22,835,000	27,066,000	23,918,000	27,758,000
Interest Income Recognized
With no related allowance recorded	270,000	310,000	1,901,000	698,000
With an allowance recorded	29,000	46,000	85,000	97,000
Total	299,000	356,000	1,986,000	795,000
Residential Real Estate [Member]
Recorded Investment
With no related allowance recorded	3,884,000		3,884,000		4,057,000
With an allowance recorded	790,000		790,000		1,069,000
Total	4,674,000		4,674,000		5,126,000
Unpaid Principal Balance
With no related allowance recorded	5,127,000		5,127,000		5,549,000
With an allowance recorded	889,000		889,000		1,265,000
Total	6,016,000		6,016,000		6,814,000
Related Allowance
With an allowance recorded	68,000		68,000		90,000
Average Recorded Investment
With no related allowance recorded	4,164,000	4,328,000	4,295,000	4,620,000
With an allowance recorded	808,000	1,341,000	825,000	1,176,000
Total	4,972,000	5,669,000	5,120,000	5,796,000
Interest Income Recognized
With no related allowance recorded	124,000	98,000	364,000	179,000
With an allowance recorded	10,000	9,000	29,000	39,000
Total	134,000	107,000	393,000	218,000
Consumer [Member]
Recorded Investment
With no related allowance recorded	94,000		94,000		117,000
With an allowance recorded	0		0		19,000
Total	94,000		94,000		136,000
Unpaid Principal Balance
With no related allowance recorded	151,000		151,000		178,000
With an allowance recorded	0		0		20,000
Total	151,000		151,000		198,000
Related Allowance
With an allowance recorded	0		0		0
Average Recorded Investment
With no related allowance recorded	110,000	158,000	119,000	196,000
With an allowance recorded	0	18,000	0	18,000
Total	110,000	176,000	119,000	214,000
Interest Income Recognized
With no related allowance recorded	7,000	2,000	15,000	8,000
With an allowance recorded	0	0	0	1,000
Total	7,000	2,000	15,000	9,000
Agricultural [Member]
Recorded Investment
With no related allowance recorded	39,000		39,000		101,000
With an allowance recorded	0		0
Total	39,000		39,000		101,000
Unpaid Principal Balance
With no related allowance recorded	151,000		151,000		619,000
With an allowance recorded	0		0
Total	151,000		151,000		619,000
Related Allowance
With an allowance recorded	0		0		0
Average Recorded Investment
With no related allowance recorded	110,000	116,000	107,000	126,000
With an allowance recorded	0	0	0	0
Total	110,000	116,000	107,000	126,000
Interest Income Recognized
With no related allowance recorded	11,000	7,000	479,000	9,000
With an allowance recorded	0	0	0	0
Total	11,000	7,000	479,000	9,000
Other [Member]
Recorded Investment
With no related allowance recorded	519,000		519,000		513,000
With an allowance recorded	0		0
Total	519,000		519,000		513,000
Unpaid Principal Balance
With no related allowance recorded	712,000		712,000		744,000
With an allowance recorded	0		0
Total	712,000		712,000		744,000
Related Allowance
With an allowance recorded	0		0		$ 0
Average Recorded Investment
With no related allowance recorded	516,000	543,000	515,000	560,000
With an allowance recorded	0	0	0	0
Total	516,000	543,000	515,000	560,000
Interest Income Recognized
With no related allowance recorded	19,000	10,000	58,000	17,000
With an allowance recorded	0	0	0	0
Total	$ 19,000	$ 10,000	$ 58,000	$ 17,000