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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Other comprehensive income/(loss): |  |  |  |  |  |
Other comprehensive (loss)/income before tax | $ (6,359) |  | $ 32,292 |  | $ 39,245 | $ 20,876
Provision (Benefit) |  |  |  |  |  |
Other comprehensive income/(loss), Provision (Benefit) | (1,336) |  | 6,781 |  | 8,241 | 4,384
After Tax |  |  |  |  |  |
Unrealized (losses) / gain, after tax | (180) |  | 29,790 |  | 40,641 | 24,863
Less reclassification adjustments, provision (benefit) | (4,843) |  | (4,279) |  | (9,637) | (8,371)
Other comprehensive (loss)/income net of tax | (5,023) | $ 36,027 | 25,511 | $ (9,019) | 31,004 | 16,492
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Other comprehensive (loss)/income before tax | (6,359) |  | 32,292 |  | 39,245 | 20,876
Provision (Benefit) |  |  |  |  |  |
Other comprehensive income/(loss), Provision (Benefit) | (1,336) |  | 6,781 |  | 8,241 | 4,384
After Tax |  |  |  |  |  |
Other comprehensive (loss)/income net of tax | (5,023) | $ 36,027 | 25,511 | $ (9,019) | 31,004 | 16,492
Securities | Available-for-Sale Securities |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Unrealized (losses) / gain, before tax | (4,231) |  | 23,339 |  | 35,726 | 24,003
Other comprehensive (loss)/income before tax | (5,287) |  | 23,334 |  | 34,665 | 23,992
Provision (Benefit) |  |  |  |  |  |
Unrealized (losses) / gain, provision (benefit) | (889) |  | 4,901 |  | 7,503 | 5,040
Other comprehensive income/(loss), Provision (Benefit) | (1,111) |  | 4,900 |  | 7,280 | 5,038
After Tax |  |  |  |  |  |
Unrealized (losses) / gain, after tax | (3,342) |  | 18,438 |  | 28,223 | 18,963
Other comprehensive (loss)/income net of tax | (4,176) |  | 18,434 |  | 27,385 | 18,954
Securities | Held-to-Maturity Securities |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Less reclassification adjustments, before tax | 320 |  | (321) |  | (314) | (1,103)
Other comprehensive (loss)/income before tax | 320 |  | (321) |  | (314) | (1,103)
Provision (Benefit) |  |  |  |  |  |
Less reclassification adjustments, Provision (Benefit) | 68 |  | (68) |  | (66) | (232)
Other comprehensive income/(loss), Provision (Benefit) | 68 |  | (68) |  | (66) | (232)
After Tax |  |  |  |  |  |
Less reclassification adjustments, provision (benefit) | 252 |  | (253) |  | (248) | (871)
Other comprehensive (loss)/income net of tax | 252 |  | (253) |  | (248) | (871)
Securities | Gain on sale of available-for sale investment securities | Available-for-Sale Securities |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Less reclassification adjustments, before tax | (1,052) |  | 0 |  | (1,052) | 0
Provision (Benefit) |  |  |  |  |  |
Less reclassification adjustments, Provision (Benefit) | (221) |  | 0 |  | (221) | 0
After Tax |  |  |  |  |  |
Less reclassification adjustments, provision (benefit) | (831) |  | 0 |  | (831) | 0
Securities | Other income | Available-for-Sale Securities |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Less reclassification adjustments, before tax | (4) |  | (5) |  | (9) | (11)
Provision (Benefit) |  |  |  |  |  |
Less reclassification adjustments, Provision (Benefit) | (1) |  | (1) |  | (2) | (2)
After Tax |  |  |  |  |  |
Less reclassification adjustments, provision (benefit) | (3) |  | (4) |  | (7) | (9)
Cash Flow Hedges |  |  |  |  |  |
Other comprehensive income/(loss): |  |  |  |  |  |
Unrealized (losses) / gain, before tax | 4,001 |  | 14,370 |  | 15,719 | 7,469
Less reclassification adjustments, before tax | (5,393) |  | (5,091) |  | (10,825) | (9,482)
Other comprehensive (loss)/income before tax | (1,392) |  | 9,279 |  | 4,894 | (2,013)
Provision (Benefit) |  |  |  |  |  |
Unrealized (losses) / gain, provision (benefit) | 839 |  | 3,018 |  | 3,301 | 1,569
Less reclassification adjustments, Provision (Benefit) | (1,132) |  | (1,069) |  | (2,274) | (1,991)
Other comprehensive income/(loss), Provision (Benefit) | (293) |  | 1,949 |  | 1,027 | (422)
After Tax |  |  |  |  |  |
Unrealized (losses) / gain, after tax | 3,162 |  | 11,352 |  | 12,418 | 5,900
Less reclassification adjustments, provision (benefit) | (4,261) |  | (4,022) |  | (8,551) | (7,491)
Other comprehensive (loss)/income net of tax | $ (1,099) |  | $ 7,330 |  | $ 3,867 | $ (1,591)

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