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OTHER COMPREHENSIVE INCOME (LOSS) Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
AFS Debt Securities: |  |  |  |
Unrealized holding gains, pre-tax amount | $ 22,412 | $ (18,115) | $ 15,572 | $ (9,993)
Unrealized holdings gains, tax (expense) benefit | (4,819) | 3,895 | (3,348) | 2,149
Unrealized holdings gains, after-tax amount | 17,593 | (14,220) | 12,224 | (7,844)
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, pre-tax amount | (1,739) | 1,742 | (4,886) | 5,137
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, tax (expense) benefit | 373 | (375) | 1,050 | (1,104)
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, after-tax amount | (1,366) | 1,367 | (3,836) | 4,033
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | 0 | (5,335) | 0 | (5,335)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | 0 | 1,147 | 0 | 1,147
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | 0 | (4,188) | 0 | (4,188)
Net unrealized gains, pre-tax amount | 24,151 | (14,522) | 20,458 | (9,795)
Net unrealized gains, tax (expense) benefit | (5,192) | 3,123 | (4,398) | 2,106
Net unrealized gains, after-tax amount | 18,959 | (11,399) | 16,060 | (7,689)
Cash Flow Hedges: |  |  |  |
Net decrease in fair value, pre-tax amount | (4,956) | 3,950 | (666) | 4,427
Net decrease in fair value, tax (expense) benefit | 1,066 | (849) | 143 | (951)
Net decrease in fair value, after-tax amount | (3,890) | 3,101 | (523) | 3,476
Net decrease in fair value, pre-tax amount | (6,141) | 3,987 | (2,025) | 4,397
Net decrease in fair value, tax (expense) benefit | 1,320 | (857) | 435 | (945)
Net decrease in fair value, after-tax amount | (4,821) | 3,130 | (1,590) | 3,452
Postretirement Plans: |  |  |  |
Net gain on postretirement plans, pre-tax amount | (8) | (6) | (22) | (20)
Net gain on postretirement plans, tax (expense) benefit | 2 | 1 | 5 | 4
Net gain on postretirement plans, net of tax | (6) | (5) | (17) | (16)
Other comprehensive income, pre-tax amount | 18,002 | (10,541) | 18,411 | (5,418)
Other comprehensive income, tax (expense) benefit | (3,870) | 2,267 | (3,958) | 1,165
Other comprehensive income (loss) | 14,132 | (8,274) | 14,453 | (4,253)
Interest Expense, Borrowings |  |  |  |
Cash Flow Hedges: |  |  |  |
Less: effective portion reclassified into interest expense, pre-tax amount | 1,185 | 872 | 3,035 | 2,518
Less: effective portion reclassified into interest expense, tax (expense) benefit | (254) | (187) | (652) | (541)
Less: effective portion reclassified into interest expense, after-tax amount | 931 | 685 | 2,383 | 1,977
Interest Income, Interest and Fees on Loans |  |  |  |
Cash Flow Hedges: |  |  |  |
Less: effective portion reclassified into interest expense, pre-tax amount | 0 | (909) | (1,676) | (2,488)
Less: effective portion reclassified into interest expense, tax (expense) benefit | 0 | 195 | 360 | 535
Less: effective portion reclassified into interest expense, after-tax amount | $ 0 | $ (714) | $ (1,316) | $ (1,953)

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