Loans, Impaired Loans (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Recorded Investment
With no related allowance recorded	$ 23,558,000		$ 23,558,000		$ 27,702,000
With an allowance recorded	5,092,000		5,092,000		5,673,000
Total	28,650,000		28,650,000		33,375,000
Unpaid Principal Balance
With no related allowance recorded	28,103,000		28,103,000		35,882,000
With an allowance recorded	5,290,000		5,290,000		6,229,000
Total	33,393,000		33,393,000		42,111,000
Related Allowance
With an allowance recorded	373,000		373,000		817,000
Average Recorded Investment
With no related allowance recorded	25,762,000	$ 30,779,000	26,782,000	$ 31,548,000
With an allowance recorded	5,037,000	6,190,000	4,967,000	5,815,000
Total	30,799,000	36,969,000	31,749,000	37,363,000
Interest Income Recognized
With no related allowance recorded	998,000	485,000	1,580,000	898,000
With an allowance recorded	45,000	13,000	88,000	86,000
Total	1,043,000	498,000	1,668,000	984,000
Cash basis interest expense on impaired loans			81,000	0
Commercial and Industrial [Member]
Recorded Investment
With no related allowance recorded	1,882,000		1,882,000		1,092,000
With an allowance recorded	385,000		385,000		401,000
Total	2,267,000		2,267,000		1,493,000
Unpaid Principal Balance
With no related allowance recorded	2,196,000		2,196,000		2,077,000
With an allowance recorded	385,000		385,000		406,000
Total	2,581,000		2,581,000		2,483,000
Related Allowance
With an allowance recorded	10,000		10,000		10,000
Average Recorded Investment
With no related allowance recorded	1,609,000	2,057,000	1,437,000	2,088,000
With an allowance recorded	389,000	494,000	393,000	291,000
Total	1,998,000	2,551,000	1,830,000	2,379,000
Interest Income Recognized
With no related allowance recorded	60,000	38,000	82,000	70,000
With an allowance recorded	6,000	2,000	11,000	13,000
Total	66,000	40,000	93,000	83,000
Commercial Secured By Real Estate [Member]
Recorded Investment
With no related allowance recorded	17,057,000		17,057,000		21,822,000
With an allowance recorded	3,785,000		3,785,000		4,184,000
Total	20,842,000		20,842,000		26,006,000
Unpaid Principal Balance
With no related allowance recorded	19,555,000		19,555,000		26,715,000
With an allowance recorded	3,915,000		3,915,000		4,538,000
Total	23,470,000		23,470,000		31,253,000
Related Allowance
With an allowance recorded	299,000		299,000		717,000
Average Recorded Investment
With no related allowance recorded	19,259,000	23,282,000	20,317,000	23,839,000
With an allowance recorded	3,746,000	4,344,000	3,694,000	4,228,000
Total	23,005,000	27,626,000	24,011,000	28,067,000
Interest Income Recognized
With no related allowance recorded	742,000	327,000	1,099,000	616,000
With an allowance recorded	29,000	0	56,000	50,000
Total	771,000	327,000	1,155,000	666,000
Residential Real Estate [Member]
Recorded Investment
With no related allowance recorded	3,990,000		3,990,000		4,057,000
With an allowance recorded	904,000		904,000		1,069,000
Total	4,894,000		4,894,000		5,126,000
Unpaid Principal Balance
With no related allowance recorded	5,320,000		5,320,000		5,549,000
With an allowance recorded	972,000		972,000		1,265,000
Total	6,292,000		6,292,000		6,814,000
Related Allowance
With an allowance recorded	64,000		64,000		90,000
Average Recorded Investment
With no related allowance recorded	4,175,000	4,528,000	4,305,000	4,682,000
With an allowance recorded	884,000	1,352,000	862,000	1,296,000
Total	5,059,000	5,880,000	5,167,000	5,978,000
Interest Income Recognized
With no related allowance recorded	138,000	101,000	221,000	177,000
With an allowance recorded	10,000	11,000	20,000	23,000
Total	148,000	112,000	241,000	200,000
Consumer [Member]
Recorded Investment
With no related allowance recorded	91,000		91,000		117,000
With an allowance recorded	18,000		18,000		19,000
Total	109,000		109,000		136,000
Unpaid Principal Balance
With no related allowance recorded	159,000		159,000		178,000
With an allowance recorded	18,000		18,000		20,000
Total	177,000		177,000		198,000
Related Allowance
With an allowance recorded	0		0		0
Average Recorded Investment
With no related allowance recorded	93,000	234,000	101,000	246,000
With an allowance recorded	18,000	0	18,000	0
Total	111,000	234,000	119,000	246,000
Interest Income Recognized
With no related allowance recorded	3,000	2,000	7,000	9,000
With an allowance recorded	0	0	1,000	0
Total	3,000	2,000	8,000	9,000
Agricultural [Member]
Recorded Investment
With no related allowance recorded	38,000		38,000		101,000
With an allowance recorded	0		0
Total	38,000		38,000		101,000
Unpaid Principal Balance
With no related allowance recorded	161,000		161,000		619,000
With an allowance recorded	0		0
Total	161,000		161,000		619,000
Related Allowance
With an allowance recorded	0		0		0
Average Recorded Investment
With no related allowance recorded	110,000	118,000	107,000	129,000
With an allowance recorded	0	0	0	0
Total	110,000	118,000	107,000	129,000
Interest Income Recognized
With no related allowance recorded	35,000	7,000	132,000	9,000
With an allowance recorded	0	0	0	0
Total	35,000	7,000	132,000	9,000
Other [Member]
Recorded Investment
With no related allowance recorded	500,000		500,000		513,000
With an allowance recorded	0		0
Total	500,000		500,000		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	560,000	515,000	564,000
With an allowance recorded	0	0	0	0
Total	516,000	560,000	515,000	564,000
Interest Income Recognized
With no related allowance recorded	20,000	10,000	39,000	17,000
With an allowance recorded	0	0	0	0
Total	$ 20,000	$ 10,000	$ 39,000	$ 17,000