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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024
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Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | $ 13,091 | $ 13,168 | $ 8,413
Nonaccrual with no Allowance for Credit Losses | 12,647 | 12,520 | 7,821
Loans Past Due over 89 Days Still Accruing | 568 | 186 | 326
Commercial/Agricultural Real Estate | Commercial real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 4,948 | 4,594 | 5,340
Nonaccrual with no Allowance for Credit Losses | 4,737 | 4,374 | 5,125
Loans Past Due over 89 Days Still Accruing | 0 | 0 | 0
Commercial/Agricultural Real Estate | Agricultural real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 5,934 | 6,222 | 382
Nonaccrual with no Allowance for Credit Losses | 5,734 | 6,020 | 383
Loans Past Due over 89 Days Still Accruing | 0 | 0 | 0
Commercial/Agricultural Real Estate | Construction and land development |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans |  | 103 |
Nonaccrual with no Allowance for Credit Losses |  | 103 |
Loans Past Due over 89 Days Still Accruing |  | 0 |
C&I/Agricultural operating: | Commercial and industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 701 | 597 | 440
Nonaccrual with no Allowance for Credit Losses | 668 | 564 | 289
Loans Past Due over 89 Days Still Accruing | 0 | 0 | 0
C&I/Agricultural operating: | Agricultural operating |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 725 | 793 | 1,106
Nonaccrual with no Allowance for Credit Losses | 725 | 793 | 1,106
Loans Past Due over 89 Days Still Accruing | 0 | 0 | 0
Residential mortgage: | Residential mortgage |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 665 | 741 | 1,127
Nonaccrual with no Allowance for Credit Losses | 665 | 548 | 900
Loans Past Due over 89 Days Still Accruing | 568 | 186 | 324
Residential mortgage: | Purchased HELOC loans |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 117 | 117 |
Nonaccrual with no Allowance for Credit Losses | 117 | 117 |
Loans Past Due over 89 Days Still Accruing | 0 | 0 |
Consumer installment: | Originated indirect paper |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans | 1 | 1 | 17
Nonaccrual with no Allowance for Credit Losses | 1 | 1 | 17
Loans Past Due over 89 Days Still Accruing | $ 0 | $ 0 | 0
Consumer installment: | Other consumer |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Total Nonaccrual Loans |  |  | 1
Nonaccrual with no Allowance for Credit Losses |  |  | 1
Loans Past Due over 89 Days Still Accruing |  |  | $ 2

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