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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022
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SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 1,424,988 |  | $ 1,416,135 | $ 1,351,827
Unearned net deferred fees and costs and loans in process |  |  | (2,585) |
Unamortized discount on acquired loans |  |  | (1,766) |
Total allowance for credit losses on loans | 1,424,988 |  | 1,411,784 |
Allowance for credit losses | (23,164) | $ (22,679) | (17,939) |
Loans receivable, net | $ 1,401,824 |  | $ 1,393,845 |
Total, percent | 100.00% |  | 100.30% |
Unearned net deferred fees and costs and loans in process, (in percent) |  |  | (0.20%) |
Unamortized discount on acquired loans (in percent) |  |  | (0.10%) |
Total loans receivable (in percent) |  |  | 100.00% |
Commercial/Agricultural Real Estate |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans |  |  | $ 1,125,279 | 1,075,841
Allowance for credit losses | $ (18,933) | (18,496) | (14,085) |
Commercial/Agricultural Real Estate | Commercial real estate |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 730,391 |  | $ 725,971 |
Total, percent | 51.30% |  | 51.50% |
Commercial/Agricultural Real Estate | Agricultural real estate |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 86,959 |  | $ 87,908 |
Total, percent | 6.10% |  | 6.20% |
Commercial/Agricultural Real Estate | Multi-family real estate |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 208,109 |  | $ 208,908 |
Total, percent | 14.60% |  | 14.80% |
Commercial/Agricultural Real Estate | Construction and land development |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 104,891 |  | $ 102,492 |
Total, percent | 7.40% |  | 7.30% |
C&I/Agricultural operating |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans |  |  | $ 164,819 | 163,471
Allowance for credit losses | $ (1,458) | (1,848) | (2,318) |
C&I/Agricultural operating | Commercial and industrial |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 133,248 |  | $ 136,013 |
Total, percent | 9.40% |  | 9.60% |
C&I/Agricultural operating | Agricultural operating |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 24,381 |  | $ 28,806 |
Total, percent | 1.70% |  | 2.00% |
Residential Mortgage |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans |  |  | $ 108,651 | 91,994
Allowance for credit losses | $ (2,452) | (2,000) | (599) |
Residential Mortgage | Residential mortgage |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 119,118 |  | $ 105,389 |
Total, percent | 8.40% |  | 7.50% |
Residential Mortgage | Purchased HELOC loans |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 3,216 |  | $ 3,262 |
Total, percent | 0.20% |  | 0.20% |
Consumer Installment |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans |  |  | $ 17,386 | $ 20,521
Allowance for credit losses | $ (321) | $ (335) | (129) |
Consumer Installment | Originated indirect paper |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 8,189 |  | $ 10,236 |
Total, percent | 0.60% |  | 0.70% |
Consumer Installment | Other consumer |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Total Loans | $ 6,486 |  | $ 7,150 |
Total, percent | 0.50% |  | 0.50% |

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