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SHAREHOLDERS’ EQUITY - Changes in Accumulated Other Comprehensive Income After-tax By Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | $ 1,618,233 | $ 1,447,412 | $ 1,522,263 | $ 1,529,116
Ending balance | 1,611,880 | 1,446,218 | 1,611,880 | 1,446,218
Total |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (123,465) | (108,481) | (130,332) | 18,777
Net change | (44,364) | (44,710) | (37,497) | (171,968)
Transfer from available-for-sale to held-to-maturity |  |  |  | 0
Ending balance | (167,829) | (153,191) | (167,829) | (153,191)
Net Unrealized Loss on Available-for-Sale Securities |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (134,533) | (123,521) | (144,549) | 5,271
Net change | (41,257) | (45,283) | (31,241) | (173,878)
Transfer from available-for-sale to held-to-maturity |  |  |  | (197)
Ending balance | (175,790) | (168,804) | (175,790) | (168,804)
Unamortized Gain (Loss) on Held-to-Maturity Securities |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | 11,861 | 14,476 | 13,185 | 15,684
Net change | (647) | (647) | (1,971) | (2,052)
Transfer from available-for-sale to held-to-maturity |  |  |  | 197
Ending balance | 11,214 | 13,829 | 11,214 | 13,829
Net Unrealized Gain (Loss) on Cash Flow Hedges |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Beginning balance | (793) | 564 | 1,032 | (2,178)
Net change | (2,460) | 1,220 | (4,285) | 3,962
Transfer from available-for-sale to held-to-maturity |  |  |  | 0
Ending balance | $ (3,253) | $ 1,784 | $ (3,253) | $ 1,784

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- Definition Amount of gain (loss) in accumulated other comprehensive income (AOCI) of derivative hedging forecasted acquisition of investment in debt security measured at amortized cost (held-to-maturity), transferred to investment in debt security measured at fair value with changes in fair value recognized in other comprehensive income (available-for-sale) and net income (trading). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-10 + Details
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