Loans (Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
Allowance for Loan Losses:
Individually Evaluated for Impairment	$ 3,995		$ 3,095
Collectively Evaluated for Impairment	11,482		11,481
Acquired with Deteriorated Credit Quality	7		8
Total Ending Allowance Balance	15,484		14,584		15,734	15,520
Loans:
Loans Individually Evaluated for Impairment	11,406		8,458
Loans Collectively Evaluated for Impairment	1,347,214		1,367,591
Loans Acquired with Deteriorated Credit Quality	13,869		14,753
Total Ending Loans Balance	1,372,489	[1]	1,390,802	[2]
Commercial and Industrial Loans and Leases [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	1,536		45
Collectively Evaluated for Impairment	3,838		3,938
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	5,374		3,983		4,753	4,555
Loans:
Loans Individually Evaluated for Impairment	6,380		2,114
Loans Collectively Evaluated for Impairment	336,856		347,808
Loans Acquired with Deteriorated Credit Quality	1,636		1,981
Total Ending Loans Balance	344,872	[1]	351,903	[2]
Commercial Real Estate Loans [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	2,459		3,050
Collectively Evaluated for Impairment	5,404		5,277
Acquired with Deteriorated Credit Quality	7		8
Total Ending Allowance Balance	7,870		8,335		8,879	8,931
Loans:
Loans Individually Evaluated for Impairment	5,026		6,344
Loans Collectively Evaluated for Impairment	575,305		566,389
Loans Acquired with Deteriorated Credit Quality	10,337		10,871
Total Ending Loans Balance	590,668	[1]	583,604	[2]
Agricultural Loans [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	0		0
Collectively Evaluated for Impairment	930		946
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	930		946		766	989
Loans:
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	176,860		195,171
Loans Acquired with Deteriorated Credit Quality	0		0
Total Ending Loans Balance	176,860	[1]	195,171	[2]
Home Equity Loans [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	0		0
Collectively Evaluated for Impairment	209		239
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	209		239		118	141
Loans:
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	81,527		81,812
Loans Acquired with Deteriorated Credit Quality	0		0
Total Ending Loans Balance	81,527	[1]	81,812	[2]
Consumer Loans [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	0		0
Collectively Evaluated for Impairment	186		188
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	186		188		189	214
Loans:
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	46,798		49,131
Loans Acquired with Deteriorated Credit Quality	130		134
Total Ending Loans Balance	46,928	[1]	49,265	[2]
Residential Mortgage Loans [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	0		0
Collectively Evaluated for Impairment	257		281
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	257		281		300	186
Loans:
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	129,868		127,280
Loans Acquired with Deteriorated Credit Quality	1,766		1,767
Total Ending Loans Balance	131,634	[1]	129,047	[2]
Unallocated [Member]
Allowance for Loan Losses:
Individually Evaluated for Impairment	0		0
Collectively Evaluated for Impairment	658		612
Acquired with Deteriorated Credit Quality	0		0
Total Ending Allowance Balance	658		612		729	504
Loans:
Loans Individually Evaluated for Impairment	0		0
Loans Collectively Evaluated for Impairment	0		0
Loans Acquired with Deteriorated Credit Quality	0		0
Total Ending Loans Balance	$ 0	[1]	$ 0	[2]

[1] Total recorded investment in loans includes $5,305 in accrued interest.

[2] Total recorded investment in loans includes $5,590 in accrued interest.