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OTHER COMPREHENSIVE INCOME (LOSS) Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance | $ 652,148 | $ 508,286 | $ 531,231 | $ 495,064
Other comprehensive income before reclassifications | 8,653 | 13,703 | 24,182 | 11,701
Less: Amounts reclassified from AOCI | (804) | (429) | (2,042) | (2,752)
Other comprehensive income | 9,457 | 14,132 | 26,224 | 14,453
Ending Balance | 676,444 | 529,900 | 676,444 | 529,900
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax | 8,473 | 17,593 |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax | 180 | (3,890) |  |
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, after-tax amount | (1,503) | (1,366) |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax |  |  |  | (1,316)
Interest Expense, Borrowings |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Less: Amounts reclassified from AOCI | (693) |  | (1,881) | (2,383)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax | 693 | 931 |  |
Accumulated Other Comprehensive Income (Loss) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance | (77,879) | (101,231) | (94,646) | (101,552)
Ending Balance | (68,422) | (87,099) | (68,422) | (87,099)
Net Unrealized Gains (Losses) on Debt Securities(1) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance | (84,324) | (110,308) | (104,015) | (107,409)
Other comprehensive income before reclassifications | 8,473 | 17,593 |  | 12,224
Less: Amounts reclassified from AOCI | (1,503) | (1,366) | (3,940) | (3,836)
Other comprehensive income | 9,976 | 18,959 | 29,667 | 16,060
Ending Balance | (74,348) | (91,349) | (74,348) | (91,349)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax |  |  | 25,727 | 12,224
Net Unrealized Gains (Losses) on Cash Flow Hedges(1) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance | 6,045 | 9,327 | 8,958 | 6,096
Other comprehensive income before reclassifications | 180 | (3,890) | (1,545) | (523)
Less: Amounts reclassified from AOCI | 693 | 931 |  | 1,067
Other comprehensive income | (513) | (4,821) | (3,426) | (1,590)
Ending Balance | 5,532 | 4,506 | 5,532 | 4,506
Defined Benefit Postretirement Plans(1) |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning Balance | 400 | (250) | 411 | (239)
Other comprehensive income before reclassifications | 0 | 0 | 0 | 0
Less: Amounts reclassified from AOCI | 6 | 6 | 17 | 17
Other comprehensive income | (6) | (6) | (17) | (17)
Ending Balance | $ 394 | $ (256) | $ 394 | $ (256)

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