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SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Components of AOCIL (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total shareholders' equity | $ 458,428 | $ 432,059 | $ 393,450 | $ 424,147
Accumulated other comprehensive income (loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Total shareholders' equity | (51,536) | (49,862) | (58,340) | 2,303
Net unrealized gain (loss) on AFS securities: |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss, before tax | (62,298) | (62,351) |  |
Income taxes related to items of accumulated other comprehensive loss | 14,557 | 14,702 |  |
Total shareholders' equity | (47,741) | (47,649) | (55,246) | 1,985
Net unrealized gain (loss) on hedging derivatives |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss, before tax | (3,368) | (1,322) |  |
Income taxes related to items of accumulated other comprehensive loss | 786 | 312 |  |
Total shareholders' equity | (2,582) | (1,010) | (1,794) | 870
Net unrealized gain (loss) on post-retirement plans |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated other comprehensive loss, before tax | (1,565) | (1,540) |  |
Income taxes related to items of accumulated other comprehensive loss | 352 | 337 |  |
Total shareholders' equity | $ (1,213) | $ (1,203) | $ (1,300) | $ (552)

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