Loans, Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for loan losses [Roll Forward]
Beginning balance	$ 9,353	$ 8,554	$ 10,408
Provision for loan losses	1,800	1,200	3,276
Charge-offs	(2,821)	(1,218)	(5,895)
Recoveries	251	817	765
Net charge-offs	(2,570)	(401)	(5,130)
Ending balance	8,583	9,353	8,554
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	860	1,125	1,072
Loans collectively evaluated for impairment	7,723	8,228	7,482
Ending balance	8,583	9,353	8,554
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	10,704	18,757	13,381
Loans collectively evaluated for impairment	534,531	496,245	434,847
Ending Balance	545,235	515,002	448,228
Commercial [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	3,199	2,899	3,598
Provision for loan losses	2,612	91	2,493
Charge-offs	(2,288)	(168)	(3,498)
Recoveries	58	377	306
Net charge-offs	(2,230)	209	(3,192)
Ending balance	3,581	3,199	2,899
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	39	83	95
Loans collectively evaluated for impairment	3,542	3,116	2,804
Ending balance	3,581	3,199	2,899
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	2,678	5,666	3,288
Loans collectively evaluated for impairment	118,073	104,978	85,522
Ending Balance	120,751	110,644	88,810
Commercial Real Estate [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	2,290	1,723	1,747
Provision for loan losses	(396)	533	351
Charge-offs	(69)	(17)	(375)
Recoveries	0	51	0
Net charge-offs	(69)	34	(375)
Ending balance	1,825	2,290	1,723
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	45	63	26
Loans collectively evaluated for impairment	1,780	2,227	1,697
Ending balance	1,825	2,290	1,723
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	976	3,729	3,042
Loans collectively evaluated for impairment	255,979	231,567	185,384
Ending Balance	256,955	235,296	188,426
Agriculture [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	557	915	1,934
Provision for loan losses	23	(360)	(907)
Charge-offs	0	(1)	(116)
Recoveries	0	3	4
Net charge-offs	0	2	(112)
Ending balance	580	557	915
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	580	557	915
Ending balance	580	557	915
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	0	1,591	0
Loans collectively evaluated for impairment	61,144	50,139	52,747
Ending Balance	61,144	51,730	52,747
Residential Mortgage [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,216	1,148	1,135
Provision for loan losses	36	244	877
Charge-offs	(71)	(333)	(864)
Recoveries	0	157	0
Net charge-offs	(71)	(176)	(864)
Ending balance	1,181	1,216	1,148
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	646	701	417
Loans collectively evaluated for impairment	535	515	731
Ending balance	1,181	1,216	1,148
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	4,647	5,575	4,823
Loans collectively evaluated for impairment	45,864	47,234	46,443
Ending Balance	50,511	52,809	51,266
Residential Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	441	724	1,198
Provision for loan losses	(366)	(201)	(648)
Charge-offs	0	(127)	(167)
Recoveries	86	45	341
Net charge-offs	86	(82)	174
Ending balance	161	441	724
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	107	254	433
Loans collectively evaluated for impairment	54	187	291
Ending balance	161	441	724
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	897	943	1,097
Loans collectively evaluated for impairment	5,066	9,501	6,489
Ending Balance	5,963	10,444	7,586
Consumer [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,023	1,110	796
Provision for loan losses	149	301	1,075
Charge-offs	(393)	(572)	(875)
Recoveries	107	184	114
Net charge-offs	(286)	(388)	(761)
Ending balance	886	1,023	1,110
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	23	24	101
Loans collectively evaluated for impairment	863	999	1,009
Ending balance	886	1,023	1,110
Loans individually and collectively evaluated for impairment [Abstract]
Loans individually evaluated for impairment	1,506	1,253	1,131
Loans collectively evaluated for impairment	48,405	52,826	58,262
Ending Balance	49,911	54,079	59,393
Unallocated [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	627	35	0
Provision for loan losses	(258)	592	35
Charge-offs	0	0	0
Recoveries	0	0	0
Net charge-offs	0	0	0
Ending balance	369	627	35
Allowance for loan loss allocations for impairments [Abstract]
Loans individually evaluated for impairment	0	0	0
Loans collectively evaluated for impairment	369	627	35
Ending balance	$ 369	$ 627	$ 35

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A valuation allowance for financing receivables that are expected to be uncollectible.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The increase (decrease) in the allowance for credit losses related to financing receivables.

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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Amount of direct write-downs of financing receivables charged against the allowance.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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