Loans, Loans Portfolio by Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	$ 811,662	$ 770,938
Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	40,112	45,287
Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	467,169	419,320
Residential real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	269,041	273,581
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	18,842	18,599
Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	15,879	13,486
Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	619	665
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	775,281	741,540
Pass [Member] | Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	39,237	44,596
Pass [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	438,732	397,938
Pass [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	263,583	267,567
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	18,779	18,528
Pass [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	14,331	12,246
Pass [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	619	665
OAEM [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	2,236	12,101
OAEM [Member] | Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	318	0
OAEM [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	1,400	9,316
OAEM [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	518	1,935
OAEM [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
OAEM [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	850
OAEM [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	34,145	17,297
Substandard [Member] | Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	557	691
Substandard [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	27,037	12,066
Substandard [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	4,940	4,079
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	63	71
Substandard [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	1,548	390
Substandard [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Commercial and industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Commercial, secured by real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Residential real estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	0	0
Doubtful [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans, net of deferred origination costs (fees)	$ 0	$ 0