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Loans, Allowance for Loan Losses and Loan Portfolio by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Individually evaluated for impairment	$ 132	$ 177
Collectively evaluated for impairment	3,196	3,106
Acquired credit impaired loans	0	292
Balance, end of period	3,328	3,575	$ 3,150	$ 3,129
Loans:
Individually evaluated for impairment	14,217	14,821
Collectively evaluated for impairment	788,299	795,636
Acquired credit impaired loans	7,965	9,346
Balance, end of period	810,481	819,803
Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	7,965	9,346
Commercial and Industrial [Member]
Allowance for loan losses:
Individually evaluated for impairment	8	9
Collectively evaluated for impairment	345	341
Acquired credit impaired loans	0	0
Balance, end of period	353	350	247	244
Loans:
Individually evaluated for impairment	329	337
Collectively evaluated for impairment	39,332	41,466
Balance, end of period	40,066	41,901
Commercial and Industrial [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	405	98
Commercial Secured By Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	30	55
Collectively evaluated for impairment	1,977	1,832
Acquired credit impaired loans	0	292
Balance, end of period	2,007	2,179	1,868	1,908
Loans:
Individually evaluated for impairment	12,036	12,580
Collectively evaluated for impairment	458,586	458,059
Balance, end of period	475,276	476,944
Commercial Secured By Real Estate [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	4,654	6,305
Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	81	100
Collectively evaluated for impairment	728	785
Acquired credit impaired loans	0	0
Balance, end of period	809	885	896	854
Loans:
Individually evaluated for impairment	1,455	1,518
Collectively evaluated for impairment	257,439	262,266
Balance, end of period	261,320	266,255
Residential Real Estate [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	2,426	2,471
Consumer [Member]
Allowance for loan losses:
Individually evaluated for impairment	13	13
Collectively evaluated for impairment	78	83
Acquired credit impaired loans	0	0
Balance, end of period	91	96	81	54
Loans:
Individually evaluated for impairment	63	52
Collectively evaluated for impairment	17,672	19,192
Balance, end of period	17,744	19,261
Consumer [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	9	17
Agricultural [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	66	60
Acquired credit impaired loans	0	0
Balance, end of period	66	60	56	66
Loans:
Individually evaluated for impairment	334	334
Collectively evaluated for impairment	15,132	14,475
Balance, end of period	15,466	14,809
Agricultural [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	0	0
Other [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	2	5
Acquired credit impaired loans	0	0
Balance, end of period	2	5	$ 2	$ 3
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	138	178
Balance, end of period	609	633
Other [Member] | Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	$ 471	$ 455

X

- Definition

Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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