LOANS, ALLOWANCE FOR LOAN LOSSES AND IMPAIRED LOANS - Changes in the ALL by Loan Type (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Allowance for Loan Losses:
Beginning balance	$ 17,043
Provision	0	$ 2,000
Ending balance	16,860	11,835
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	1,261	1,033	$ 1,115
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	15,599	10,802	15,928
Loans Receivable:
Total Loans	1,201,262	1,189,425	1,246,889
Ending balance: individually evaluated for impairment	40,243	55,951	43,397
Ending balance: collectively evaluated for impairment	1,161,019	1,133,474	1,203,492
Originated Loans
Allowance for Loan Losses:
Beginning balance	14,819	9,551
Charge-offs	(25)	(356)
Recoveries	30	25
Provision	204	1,630
Ending balance	15,028	10,850
Loans Receivable:
Total Loans	937,668	789,856	960,725
Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	17,441	31,231	17,946
Other acquired loans
Allowance for Loan Losses:
Beginning balance	2,224	769
Charge-offs	(200)	(164)
Recoveries	12	10
Provision	(204)	370
Ending balance	1,832
Loans Receivable:
Total Loans	246,153	368,338	268,218
Acquired Loans
Allowance for Loan Losses:
Ending balance	1,832	985
Loans Receivable:
Total Loans	263,594		286,164
Commercial/agriculture real estate
Allowance for Loan Losses:
Ending balance	12,410	7,942
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	1,094	733	698
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	11,316	7,209	11,257
Loans Receivable:
Total Loans	795,476	802,469	797,139
Ending balance: individually evaluated for impairment	24,948	36,470	26,303
Ending balance: collectively evaluated for impairment	770,528	765,999	770,836
Commercial/agriculture real estate \| Originated Loans
Allowance for Loan Losses:
Beginning balance	10,271	6,205
Charge-offs	0	0
Recoveries	5	0
Provision	833	1,072
Ending balance	11,109	7,277
Loans Receivable:
Total Loans	599,182	519,958	586,826
Commercial/agriculture real estate \| Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	14,856	25,452	15,100
Commercial/agriculture real estate \| Other acquired loans
Allowance for Loan Losses:
Beginning balance	1,684	526
Charge-offs	(200)	0
Recoveries	0	0
Provision	(183)	139
Ending balance	1,301
Loans Receivable:
Total Loans	181,438	257,059	195,213
Commercial/agriculture real estate \| Acquired Loans
Allowance for Loan Losses:
Ending balance	1,301	665
C&I/Agricultural operating
Allowance for Loan Losses:
Ending balance	1,727	1,819
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	10	92	190
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	1,717	1,727	2,063
Loans Receivable:
Total Loans	243,114	159,946	273,040
Ending balance: individually evaluated for impairment	6,197	8,759	7,115
Ending balance: collectively evaluated for impairment	236,917	151,187	265,925
C&I/Agricultural operating \| Originated Loans
Allowance for Loan Losses:
Beginning balance	2,112	1,643
Charge-offs	0	(307)
Recoveries	8	0
Provision	(487)	323
Ending balance	1,633	1,659
Loans Receivable:
Total Loans	216,773	107,949	243,449
C&I/Agricultural operating \| Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	1,367	3,845	1,534
C&I/Agricultural operating \| Other acquired loans
Allowance for Loan Losses:
Beginning balance	141	27
Charge-offs	0	(135)
Recoveries	7	0
Provision	(54)	268
Ending balance	94
Loans Receivable:
Total Loans	24,974	48,152	28,057
C&I/Agricultural operating \| Acquired Loans
Allowance for Loan Losses:
Ending balance	94	160
Residential mortgage
Allowance for Loan Losses:
Ending balance	1,329	1,039
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	157	181	226
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	1,172	858	1,150
Loans Receivable:
Total Loans	127,622	173,412	137,646
Ending balance: individually evaluated for impairment	8,843	10,226	9,621
Ending balance: collectively evaluated for impairment	118,779	163,186	128,025
Residential mortgage \| Originated Loans
Allowance for Loan Losses:
Beginning balance	1,041	879
Charge-offs	0	0
Recoveries	7	5
Provision	(107)	40
Ending balance	941	924
Loans Receivable:
Total Loans	87,576	110,455	92,543
Residential mortgage \| Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	1,218	1,934	1,312
Residential mortgage \| Other acquired loans
Allowance for Loan Losses:
Beginning balance	335	163
Charge-offs	0	(27)
Recoveries	1	8
Provision	52	(29)
Ending balance	388
Loans Receivable:
Total Loans	38,828	61,023	43,791
Residential mortgage \| Acquired Loans
Allowance for Loan Losses:
Ending balance	388	115
Consumer installment
Allowance for Loan Losses:
Ending balance	499	575
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	0	27	1
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	499	548	552
Loans Receivable:
Total Loans	35,050	53,598	39,064
Ending balance: individually evaluated for impairment	255	496	358
Ending balance: collectively evaluated for impairment	34,795	53,102	38,706
Consumer installment \| Originated Loans
Allowance for Loan Losses:
Beginning balance	489	467
Charge-offs	(25)	(49)
Recoveries	10	20
Provision	(24)	92
Ending balance	450	530
Loans Receivable:
Total Loans	34,137	51,494	37,907
Consumer installment \| Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	0	0	0
Consumer installment \| Other acquired loans
Allowance for Loan Losses:
Beginning balance	64	53
Charge-offs	0	(2)
Recoveries	4	2
Provision	(19)	(8)
Ending balance	49
Loans Receivable:
Total Loans	913	2,104	1,157
Consumer installment \| Acquired Loans
Allowance for Loan Losses:
Ending balance	49	45
Unallocated
Allowance for Loan Losses:
Ending balance	895	460
Financing Receivable, Allowance for Credit Loss, Additional Information [Abstract]
Amount of allowance for loan losses arising from loans individually evaluated for impairment	0	0	0
Amount of allowance for loan losses arising from loans collectively evaluated for impairment	895	460	906
Loans Receivable:
Total Loans	0	0	0
Ending balance: individually evaluated for impairment	0	0	0
Ending balance: collectively evaluated for impairment	0	0	0
Unallocated \| Originated Loans
Allowance for Loan Losses:
Beginning balance	906	357
Charge-offs	0	0
Recoveries	0	0
Provision	(11)	103
Ending balance	895	460
Loans Receivable:
Total Loans	0	0	0
Unallocated \| Purchased credit impaired loans
Allowance for Loan Losses:
Ending balance	0	0
Loans Receivable:
Total Loans	0	0	0
Unallocated \| Other acquired loans
Allowance for Loan Losses:
Beginning balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provision	0	0
Ending balance	0
Loans Receivable:
Total Loans	0	0	$ 0
Unallocated \| Acquired Loans
Allowance for Loan Losses:
Ending balance	$ 0	$ 0

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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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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Amount of expense related to estimated loss from loan and lease transactions.

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