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OTHER COMPREHENSIVE INCOME - Changes in the Accumulated Balances (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Changes in the accumulated balances for each component of other comprehensive income |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | $ 183,462 | $ 180,051 | $ 179,084 | $ 180,149 | $ 176,045 | $ 172,821 | $ 173,334 | $ 179,084 | $ 173,334 | $ 173,334
Current year-to-date other comprehensive income | 1,657 |  |  |  | 3,552 |  |  | 3,193 | 3,483 | 908
Balance at end of period | 186,815 | 183,462 | 180,051 | 179,084 | 180,149 | 176,045 | 172,821 | 186,815 | 180,149 | 179,084
Other comprehensive (loss) income, net of tax | 1,657 | 81 | 1,455 | (2,575) | 3,552 | 633 | (702) | 3,193 | 3,483 |
Unrealized Gains (Losses) on AFS Securities |  |  |  |  |  |  |  |  |  |
Changes in the accumulated balances for each component of other comprehensive income |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  |  | (22,753) |  |  |  | (24,001) | (22,753) | (24,001) | (24,001)
Current year-to-date other comprehensive income |  |  |  |  |  |  |  |  |  | 1,248
Balance at end of period | (18,560) |  |  | (22,753) |  |  |  | (18,560) |  | (22,753)
Other comprehensive (loss) income, net of tax |  |  |  |  |  |  |  | 4,193 |  |
Other Accumulated Comprehensive Income (Loss), net of tax |  |  |  |  |  |  |  |  |  |
Changes in the accumulated balances for each component of other comprehensive income |  |  |  |  |  |  |  |  |  |
Balance at beginning of period | (14,884) | (14,965) | (16,420) | (13,845) | (17,397) | (18,030) | (17,328) | (16,420) | (17,328) | (17,328)
Balance at end of period | (13,227) | (14,884) | (14,965) | (16,420) | (13,845) | (17,397) | (18,030) | $ (13,227) | $ (13,845) | $ (16,420)
Other comprehensive (loss) income, net of tax | $ 1,657 | $ 81 | $ 1,455 | $ (2,575) | $ 3,552 | $ 633 | $ (702) |  |  |

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