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SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Schedule of Components of Other Comprehensive (Loss)/Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Gains (losses) arising during the period |  |  |
Net of Tax | $ (177,805) | $ (34,114) | $ 18,874
Less: reclassification adjustment for gains realized in net income |  |  |
Net of Tax | 4 | 0 | (4)
Other comprehensive income (loss) |  |  |
Total other comprehensive (loss)/income, before tax | (240,074) | (45,801) | 25,237
Total income tax benefit/(expense) related to other comprehensive income (loss) | 62,265 | 11,687 | (6,359)
Total other comprehensive (loss)/income | (177,809) | (34,114) | 18,878
Net unrealized holding (loss) on AFS securities: |  |  |
Gains (losses) arising during the period |  |  |
Before Tax | (235,075) | (46,794) | 25,721
Tax Effect | 60,920 | 11,937 | (6,470)
Net of Tax | (174,155) | (34,857) | 19,251
Less: reclassification adjustment for gains realized in net income |  |  |
Before Tax | 6 | 0 | (5)
Tax Effect | (2) | 0 | 1
Net of Tax | 4 | 0 | (4)
Other comprehensive income (loss) |  |  |
Total other comprehensive (loss)/income, before tax | (235,081) | (46,794) | 25,726
Total income tax benefit/(expense) related to other comprehensive income (loss) | 60,922 | 11,937 | (6,471)
Total other comprehensive (loss)/income | (174,159) | (34,857) | 19,255
Net (loss) on effective cash flow hedging derivatives |  |  |
Gains (losses) arising during the period |  |  |
Before Tax | (6,667) |  |
Tax Effect | 1,789 |  |
Net of Tax | (4,878) | 0 | 0
Less: reclassification adjustment for gains realized in net income |  |  |
Before Tax | 0 |  |
Tax Effect | 0 |  |
Net of Tax | 0 | 0 | 0
Other comprehensive income (loss) |  |  |
Total other comprehensive (loss)/income, before tax | (6,667) |  |
Total income tax benefit/(expense) related to other comprehensive income (loss) | 1,789 |  |
Total other comprehensive (loss)/income | (4,878) | 0 | 0
Net unrealized holding (loss) on pension plans |  |  |
Gains (losses) arising during the period |  |  |
Before Tax | 1,674 | 993 | (489)
Tax Effect | (446) | (250) | 112
Net of Tax | 1,228 | 743 | (377)
Less: reclassification adjustment for gains realized in net income |  |  |
Before Tax | 0 | 0 | 0
Tax Effect | 0 | 0 | 0
Net of Tax | 0 | 0 | 0
Other comprehensive income (loss) |  |  |
Total other comprehensive (loss)/income, before tax | 1,674 | 993 | (489)
Total income tax benefit/(expense) related to other comprehensive income (loss) | (446) | (250) | 112
Total other comprehensive (loss)/income | $ 1,228 | $ 743 | $ (377)

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