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STOCKHOLDERS' EQUITY (Change in Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 2,372,737 | $ 2,710,071 | $ 2,708,490
Other comprehensive income (loss) | 74,937 | (436,921) | (52,380)
Ending balance | 2,556,327 | 2,372,737 | 2,710,071
Unrealized Gains (Losses) on AFS Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (363,919) | 22,763 | 74,161
Other comprehensive loss before reclassification | 29,006 | (386,684) | (51,329)
Amounts reclassified from AOCI into earnings | 32,381 | 2 | (69)
Other comprehensive income (loss) | 61,387 | (386,682) | (51,398)
Ending balance | (302,532) | (363,919) | 22,763
Unrealized Gains (Losses) for AFS Securities Transferred to HTM |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 17 | 35 | 55
Other comprehensive loss before reclassification | 0 | 0 | 0
Amounts reclassified from AOCI into earnings | (11) | (18) | (20)
Other comprehensive income (loss) | (11) | (18) | (20)
Ending balance | 6 | 17 | 35
Change in Fair Value of Cash Flow Hedge |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (54,610) | (1,567) | 0
Other comprehensive loss before reclassification | 12,445 | (53,043) | (1,520)
Amounts reclassified from AOCI into earnings |  | 0 | (47)
Other comprehensive income (loss) | 12,445 | (53,043) | (1,567)
Ending balance | (42,165) | (54,610) | (1,567)
Unrealized Gains (Losses) on BOLI |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 226 | (2,596) | (3,201)
Other comprehensive loss before reclassification | 10 | 2,205 | 0
Amounts reclassified from AOCI into earnings | 1,106 | 617 | 605
Other comprehensive income (loss) | 1,116 | 2,822 | 605
Ending balance | 1,342 | 226 | (2,596)
AOCI Attributable to Parent |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (418,286) | 18,635 | 71,015
Other comprehensive loss before reclassification | 41,461 | (437,522) | (52,849)
Amounts reclassified from AOCI into earnings | 33,476 | 601 | 469
Other comprehensive income (loss) | 74,937 | (436,921) | (52,380)
Ending balance | $ (343,349) | $ (418,286) | $ 18,635

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