LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Allowance for Credit Losses Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Allowance for Credit Losses - Loans:
Beginning of the period	$ 20,549	$ 22,908	$ 22,908
Charge-offs	(82)	(5)	(221)
Recoveries	89	58	121
(Reversals)/additions to ACL - Loans via provision for credit losses charged to operations	(351)	(525)	(2,259)
Ending of the period	20,205	22,436	20,549
Commercial/Agricultural Real Estate
Allowance for Credit Losses - Loans:
Beginning of the period	16,516	18,784	18,784
Charge-offs	(51)	0	(39)
Recoveries	40	39	56
(Reversals)/additions to ACL - Loans via provision for credit losses charged to operations	(261)	(568)	(2,285)
Ending of the period	16,244	18,255	16,516
C&I/Agricultural operating:
Allowance for Credit Losses - Loans:
Beginning of the period	1,330	1,105	1,105
Charge-offs	(20)	0	(143)
Recoveries	45	15	36
(Reversals)/additions to ACL - Loans via provision for credit losses charged to operations	75	46	332
Ending of the period	1,430	1,166	1,330
Residential mortgage:
Allowance for Credit Losses - Loans:
Beginning of the period	2,489	2,744	2,744
Charge-offs	0	0	(4)
Recoveries	1	1	7
(Reversals)/additions to ACL - Loans via provision for credit losses charged to operations	(152)	20	(258)
Ending of the period	2,338	2,765	2,489
Consumer installment:
Allowance for Credit Losses - Loans:
Beginning of the period	214	275	275
Charge-offs	(11)	(5)	(35)
Recoveries	3	3	22
(Reversals)/additions to ACL - Loans via provision for credit losses charged to operations	(13)	(23)	(48)
Ending of the period	$ 193	$ 250	$ 214

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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-Name Accounting Standards Codification
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-Paragraph 1
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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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