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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
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The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were 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.

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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 balance of financing receivables that were collectively evaluated for impairment.

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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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Loans, Allowance for Loan Losses and Loan Portfolio by Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Individually evaluated for impairment	$ 216	$ 191
Collectively evaluated for impairment	3,313	3,212
Acquired credit impaired loans	0	0
Balance, end of period	3,529	3,403	$ 3,328	$ 3,575
Loans:
Individually evaluated for impairment	12,865	13,167
Collectively evaluated for impairment	837,172	828,411
Acquired credit impaired loans	6,620	7,482
Balance, end of period	856,657	849,060
Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	6,620	7,482
Commercial and Industrial [Member]
Allowance for loan losses:
Individually evaluated for impairment	11	8
Collectively evaluated for impairment	382	370
Acquired credit impaired loans	0	0
Balance, end of period	393	378	353	350
Loans:
Individually evaluated for impairment	294	303
Collectively evaluated for impairment	36,603	34,792
Balance, end of period	37,155	36,103
Commercial and Industrial [Member] \| Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	258	1,008
Commercial Secured By Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	4	146
Collectively evaluated for impairment	2,139	2,032
Acquired credit impaired loans	0	0
Balance, end of period	2,143	2,178	2,007	2,179
Loans:
Individually evaluated for impairment	10,879	11,289
Collectively evaluated for impairment	527,656	512,259
Balance, end of period	542,524	527,596
Commercial Secured By Real Estate [Member] \| Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	3,989	4,048
Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	189	29
Collectively evaluated for impairment	680	688
Acquired credit impaired loans	0	0
Balance, end of period	869	717	809	885
Loans:
Individually evaluated for impairment	1,468	1,351
Collectively evaluated for impairment	243,526	248,674
Balance, end of period	246,955	252,049
Residential Real Estate [Member] \| Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	1,961	2,024
Consumer [Member]
Allowance for loan losses:
Individually evaluated for impairment	12	8
Collectively evaluated for impairment	66	68
Acquired credit impaired loans	0	0
Balance, end of period	78	76	91	96
Loans:
Individually evaluated for impairment	46	47
Collectively evaluated for impairment	17,240	17,516
Balance, end of period	17,286	17,563
Consumer [Member] \| Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	0	0
Agricultural [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	44	53
Acquired credit impaired loans	0	0
Balance, end of period	44	53	66	60
Loans:
Individually evaluated for impairment	178	177
Collectively evaluated for impairment	12,053	15,033
Balance, end of period	12,231	15,210
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	1
Acquired credit impaired loans	0	0
Balance, end of period	2	1	$ 2	$ 5
Loans:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	94	137
Balance, end of period	506	539
Other [Member] \| Acquired credit impaired loans [Member]
Loans:
Acquired credit impaired loans	$ 412	$ 402