Loans, Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Allowance for loan losses [Roll Forward]
Balance, beginning of period	$ 2,837	$ 3,370	$ 3,121	$ 3,588
Provision charged to expenses	677	255	746	336
Losses charged off	(856)	(277)	(1,276)	(640)
Recoveries	221	46	288	110
Balance, end of period	2,879	3,394	2,879	3,394
Commercial and Industrial [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	131	72	129	175
Provision charged to expenses	41	255	42	146
Losses charged off	(11)	0	(11)	0
Recoveries	1	4	2	10
Balance, end of period	162	331	162	331
Commercial Secured By Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	1,640	2,530	1,990	2,520
Provision charged to expenses	552	(294)	515	(81)
Losses charged off	(633)	(168)	(946)	(371)
Recoveries	96	0	96	0
Balance, end of period	1,655	2,068	1,655	2,068
Residential Real Estate [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	934	703	926	826
Provision charged to expenses	53	264	117	239
Losses charged off	(115)	(56)	(197)	(175)
Recoveries	42	5	68	26
Balance, end of period	914	916	914	916
Consumer [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	54	64	63	66
Provision charged to expenses	16	17	(13)	14
Losses charged off	(18)	(38)	(29)	(61)
Recoveries	10	26	41	50
Balance, end of period	62	69	62	69
Agricultural [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	77	0	11	0
Provision charged to expenses	6	8	72	8
Losses charged off	(67)	0	(67)	0
Recoveries	67	0	67	0
Balance, end of period	83	8	83	8
Other [Member]
Allowance for loan losses [Roll Forward]
Balance, beginning of period	1	1	2	1
Provision charged to expenses	9	5	13	10
Losses charged off	(12)	(15)	(26)	(33)
Recoveries	5	11	14	24
Balance, end of period	$ 3	$ 2	$ 3	$ 2