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LOANS, ALLOWANCE FOR CREDIT LOSSES - Credit Quality Risk Rating (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	$ 121,811	$ 190,301
One Year Prior	168,238	313,863
Two Years Prior	261,269	420,211
Three Years Prior	349,214	172,168
Four Years Prior	153,207	93,413
Prior	225,687	201,004
Revolving	88,929	69,766
Revolving to Term	626	66
Total	1,368,981	1,460,792
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	135	2
Current period gross charge-offs, Two Years Prior	10	21
Current period gross charge-offs, Three Years Prior	40	43
Current period gross charge-offs, Four Years Prior	5	3
Current period gross charge-offs, Prior	21	91
Current period gross charge-offs, Revolving	10	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	221	160
Commercial/Agricultural real estate: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	49,753	73,898
One Year Prior	77,787	134,279
Two Years Prior	126,597	249,497
Three Years Prior	209,738	95,429
Four Years Prior	89,753	71,287
Prior	145,712	113,853
Revolving	7,669	10,204
Revolving to Term	0	0
Total	707,009	748,447
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	10
Current period gross charge-offs, Three Years Prior	39	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	4
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	39	14
Commercial/Agricultural real estate: | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	3,556	16,335
One Year Prior	11,072	19,557
Two Years Prior	17,637	16,991
Three Years Prior	15,200	7,719
Four Years Prior	7,335	5,646
Prior	17,223	15,900
Revolving	715	1,009
Revolving to Term	0	0
Total	72,738	83,157
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	32
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	0	32
Commercial/Agricultural real estate: | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	8,777	5,016
One Year Prior	7,790	50,617
Two Years Prior	40,426	95,686
Three Years Prior	101,213	45,685
Four Years Prior	43,115	8,591
Prior	19,005	22,364
Revolving	380	45
Revolving to Term	0	0
Total	220,706	228,004
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	0	0
Commercial/Agricultural real estate: | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	23,832	42,639
One Year Prior	25,102	37,783
Two Years Prior	10,186	18,912
Three Years Prior	346	8,014
Four Years Prior	1,297	119
Prior	971	1,288
Revolving	16,412	1,463
Revolving to Term	0	0
Total	78,146	110,218
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	0	0
Commercial/Agricultural operating: | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	17,599	16,758
One Year Prior	13,549	31,915
Two Years Prior	31,479	28,059
Three Years Prior	14,043	11,406
Four Years Prior	8,787	4,751
Prior	4,197	2,025
Revolving	25,255	26,259
Revolving to Term	626	17
Total	115,535	121,190
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	131	0
Current period gross charge-offs, Two Years Prior	7	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	5	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	143	0
Commercial/Agricultural operating: | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	3,373	4,734
One Year Prior	3,111	4,384
Two Years Prior	3,617	1,560
Three Years Prior	920	746
Four Years Prior	438	295
Prior	1,884	2,145
Revolving	17,674	11,831
Revolving to Term	0	0
Total	31,017	25,695
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	0	0
Residential mortgage: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	13,400	28,808
One Year Prior	28,598	33,801
Two Years Prior	30,516	8,743
Three Years Prior	7,369	2,610
Four Years Prior	2,141	2,306
Prior	32,511	36,619
Revolving	17,357	15,544
Revolving to Term	0	48
Total	131,892	128,479
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	10
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	4	68
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	4	78
Residential mortgage: | Purchased HELOC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	2,956	2,880
Revolving to Term	0	0
Total	2,956	2,880
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	0	0
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	0	0
Consumer installment: | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	3,970	6,535
Revolving	0	0
Revolving to Term	0	0
Total	3,970	6,535
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	0	0
Current period gross charge-offs, Two Years Prior	0	0
Current period gross charge-offs, Three Years Prior	0	0
Current period gross charge-offs, Four Years Prior	0	0
Current period gross charge-offs, Prior	17	13
Current period gross charge-offs, Revolving	0	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	17	13
Consumer installment: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	1,521	2,113
One Year Prior	1,229	1,527
Two Years Prior	811	763
Three Years Prior	385	559
Four Years Prior	341	418
Prior	214	275
Revolving	511	531
Revolving to Term	0	1
Total	5,012	6,187
Current period gross charge-offs, Current Fiscal Year	0	0
Current period gross charge-offs, One Year Prior	4	2
Current period gross charge-offs, Two Years Prior	3	1
Current period gross charge-offs, Three Years Prior	1	11
Current period gross charge-offs, Four Years Prior	0	3
Current period gross charge-offs, Prior	0	6
Current period gross charge-offs, Revolving	10	0
Current period gross charge-offs, Revolving to Term	0	0
Current period gross charge-offs, Total	18	23
Risk rating 1 to 5 | Commercial/Agricultural real estate: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	49,580	73,564
One Year Prior	76,381	133,583
Two Years Prior	123,806	236,774
Three Years Prior	207,155	90,881
Four Years Prior	89,539	71,104
Prior	141,264	107,999
Revolving	7,669	10,204
Revolving to Term	0	0
Total	695,394	724,109
Risk rating 1 to 5 | Commercial/Agricultural real estate: | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	3,556	16,335
One Year Prior	10,870	19,026
Two Years Prior	17,160	11,582
Three Years Prior	10,098	7,719
Four Years Prior	7,335	5,463
Prior	16,642	15,418
Revolving	715	1,009
Revolving to Term	0	0
Total	66,376	76,552
Risk rating 1 to 5 | Commercial/Agricultural real estate: | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	8,777	5,016
One Year Prior	7,790	50,617
Two Years Prior	40,426	95,686
Three Years Prior	101,213	45,685
Four Years Prior	43,115	8,591
Prior	19,005	22,364
Revolving	380	45
Revolving to Term	0	0
Total	220,706	228,004
Risk rating 1 to 5 | Commercial/Agricultural real estate: | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	23,832	42,639
One Year Prior	25,102	37,783
Two Years Prior	10,186	18,912
Three Years Prior	346	8,014
Four Years Prior	1,297	119
Prior	868	1,124
Revolving	16,412	1,314
Revolving to Term	0	0
Total	78,043	109,905
Risk rating 1 to 5 | Commercial/Agricultural operating: | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	17,599	16,758
One Year Prior	13,049	31,915
Two Years Prior	28,343	28,059
Three Years Prior	13,629	11,406
Four Years Prior	8,787	4,746
Prior	4,197	2,023
Revolving	24,809	24,059
Revolving to Term	0	0
Total	110,413	118,966
Risk rating 1 to 5 | Commercial/Agricultural operating: | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	3,373	4,734
One Year Prior	3,062	3,908
Two Years Prior	3,144	856
Three Years Prior	563	746
Four Years Prior	198	295
Prior	1,884	2,144
Revolving	17,609	11,831
Revolving to Term	0	0
Total	29,833	24,514
Risk rating 1 to 5 | Residential mortgage: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	13,400	28,808
One Year Prior	28,598	33,660
Two Years Prior	30,386	8,743
Three Years Prior	7,369	2,610
Four Years Prior	2,141	2,292
Prior	30,004	33,744
Revolving	17,349	15,544
Revolving to Term	0	0
Total	129,247	125,401
Risk rating 1 to 5 | Residential mortgage: | Purchased HELOC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	2,839	2,880
Revolving to Term	0	0
Total	2,839	2,880
Risk rating 1 to 5 | Consumer installment: | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	3,944	6,491
Revolving	0	0
Revolving to Term	0	0
Total	3,944	6,491
Risk rating 1 to 5 | Consumer installment: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	1,519	2,104
One Year Prior	1,229	1,525
Two Years Prior	811	763
Three Years Prior	385	559
Four Years Prior	341	402
Prior	214	274
Revolving	511	530
Revolving to Term	0	1
Total	5,010	6,158
Risk rating 6 | Commercial/Agricultural real estate: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	173	309
One Year Prior	1,406	0
Two Years Prior	2,238	9,510
Three Years Prior	138	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	3,955	9,819
Risk rating 6 | Commercial/Agricultural real estate: | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	171
Two Years Prior	0	5,409
Three Years Prior	0	0
Four Years Prior	0	152
Prior	140	482
Revolving	0	0
Revolving to Term	0	0
Total	140	6,214
Risk rating 6 | Commercial/Agricultural real estate: | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 6 | Commercial/Agricultural real estate: | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	103	110
Revolving	0	0
Revolving to Term	0	0
Total	103	110
Risk rating 6 | Commercial/Agricultural operating: | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	3,062	0
Three Years Prior	13	0
Four Years Prior	0	5
Prior	0	0
Revolving	292	2,200
Revolving to Term	626	0
Total	3,993	2,205
Risk rating 6 | Commercial/Agricultural operating: | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	49	0
Two Years Prior	0	0
Three Years Prior	37	0
Four Years Prior	240	0
Prior	0	0
Revolving	65	0
Revolving to Term	0	0
Total	391	0
Risk rating 6 | Residential mortgage: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 6 | Residential mortgage: | Purchased HELOC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 6 | Consumer installment: | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 6 | Consumer installment: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 7 | Commercial/Agricultural real estate: | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	25
One Year Prior	0	696
Two Years Prior	553	3,213
Three Years Prior	2,445	4,548
Four Years Prior	214	183
Prior	4,448	5,854
Revolving	0	0
Revolving to Term	0	0
Total	7,660	14,519
Risk rating 7 | Commercial/Agricultural real estate: | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	202	360
Two Years Prior	477	0
Three Years Prior	5,102	0
Four Years Prior	0	31
Prior	441	0
Revolving	0	0
Revolving to Term	0	0
Total	6,222	391
Risk rating 7 | Commercial/Agricultural real estate: | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	0	0
Revolving to Term	0	0
Total	0	0
Risk rating 7 | Commercial/Agricultural real estate: | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	54
Revolving	0	149
Revolving to Term	0	0
Total	0	203
Risk rating 7 | Commercial/Agricultural operating: | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	500	0
Two Years Prior	74	0
Three Years Prior	401	0
Four Years Prior	0	0
Prior	0	2
Revolving	154	0
Revolving to Term	0	17
Total	1,129	19
Risk rating 7 | Commercial/Agricultural operating: | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	476
Two Years Prior	473	704
Three Years Prior	320	0
Four Years Prior	0	0
Prior	0	1
Revolving	0	0
Revolving to Term	0	0
Total	793	1,181
Risk rating 7 | Residential mortgage: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	141
Two Years Prior	130	0
Three Years Prior	0	0
Four Years Prior	0	14
Prior	2,507	2,875
Revolving	8	0
Revolving to Term	0	48
Total	2,645	3,078
Risk rating 7 | Residential mortgage: | Purchased HELOC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	0	0
Revolving	117	0
Revolving to Term	0	0
Total	117	0
Risk rating 7 | Consumer installment: | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	0	0
One Year Prior	0	0
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	0
Prior	26	44
Revolving	0	0
Revolving to Term	0	0
Total	26	44
Risk rating 7 | Consumer installment: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current Fiscal Year	2	9
One Year Prior	0	2
Two Years Prior	0	0
Three Years Prior	0	0
Four Years Prior	0	16
Prior	0	1
Revolving	0	1
Revolving to Term	0	0
Total	$ 2	$ 29

X

- Definition

Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Loss, Writeoff

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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-Topic 326
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-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

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X

- Definition

Amortized cost excluding accrued interest, of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
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- Definition

Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
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