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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest income | $ 95,018 | $ 88,623 | $ 279,788 | $ 252,325
Income tax expense | 4,400 | 4,479 | 13,175 | 10,130
Other expense | 2,552 | 2,609 | 10,918 | 7,742
Net income | 23,338 | 25,252 | 69,288 | 64,141
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net income | (397) | (434) | (1,234) | (1,219)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Debt Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense | 103 |  | 320 |
Net income | (385) |  | (1,199) |
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Held-to-Maturity Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Interest income | (488) | (501) | (1,473) | (1,486)
Income tax expense |  | 113 |  | 316
Net income |  | (423) |  | (1,186)
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Available-for-Sale Securities |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net securities gains (losses) | 0 | (35) | (46) | (16)
Income tax expense | 103 |  |  |
Amount Reclassified From Accumulated Other Comprehensive Income (Loss) | Defined Benefit Pension Items |  |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Income tax expense | 4 | 4 | 12 | 12
Other expense | (16) | (15) | (47) | (45)
Net income | $ (12) | $ (11) | $ (35) | $ (33)

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