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SECURITIES (Schedule of Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract] |  |  |  |
Amortized Cost |  | $ 27,203 |  |
Fair Value |  | 28,694 |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 2,729,980 | 3,218,777 |  |
Gross Unrealized Gains | 2,074 | 1,463 |  |
Gross Unrealized Losses | (358,271) | (431,209) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | 2,373,783 | 2,789,031 |  |
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |  |  |
Amortized Cost | 1,059,387 | 1,117,967 |  |
Gross Unrealized Gains | 687 | 109 |  |
Gross Unrealized Losses | (152,228) | (175,896) |  |
Debt Securities, Held-to-maturity, Fair Value | 907,514 | 942,180 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | (332) | (379) | $ (433) | $ (94)
U.S. Government and agency obligations |  |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 34,929 | 56,344 |  |
Gross Unrealized Gains | 0 | 8 |  |
Gross Unrealized Losses | (740) | (1,244) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | 34,189 | 55,108 |  |
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |  |  |
Amortized Cost | 307 | 312 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Losses | (5) | (7) |  |
Debt Securities, Held-to-maturity, Fair Value | 302 | 305 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | 0 | 0 | 0 | 0
Municipal bonds |  |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 161,264 | 301,449 |  |
Gross Unrealized Gains | 832 | 530 |  |
Gross Unrealized Losses | (29,191) | (40,770) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | 132,905 | 261,209 |  |
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |  |  |
Amortized Cost | 466,032 | 503,117 |  |
Gross Unrealized Gains | 687 | 109 |  |
Gross Unrealized Losses | (53,563) | (70,907) |  |
Debt Securities, Held-to-maturity, Fair Value | 412,999 | 432,319 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | (157) | (183) | (203) | (59)
Corporate bonds |  |  |  |
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract] |  |  |  |
Amortized Cost |  | 27,203 |  |
Fair Value |  | 28,694 |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 131,291 | 133,334 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Losses | (12,168) | (11,481) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | 119,123 | 121,853 |  |
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |  |  |
Amortized Cost | 2,781 | 2,961 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Losses | (20) | (16) |  |
Debt Securities, Held-to-maturity, Fair Value | 2,586 | 2,945 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | (175) | (196) | (230) | (35)
Mortgage-backed or related securities |  |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 2,179,947 | 2,505,172 |  |
Gross Unrealized Gains | 942 | 885 |  |
Gross Unrealized Losses | (314,175) | (366,721) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | 1,866,714 | 2,139,336 |  |
Debt Securities, Held-to-Maturity, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |  |  |
Amortized Cost | 590,267 | 611,577 |  |
Gross Unrealized Gains | 0 | 0 |  |
Gross Unrealized Losses | (98,640) | (104,966) |  |
Debt Securities, Held-to-maturity, Fair Value | 491,627 | 506,611 |  |
Debt Securities, Held-to-Maturity, Allowance for Credit Loss | 0 | 0 | $ 0 | $ 0
Asset-backed securities |  |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 222,549 | 222,478 |  |
Gross Unrealized Gains | 300 | 40 |  |
Gross Unrealized Losses | (1,997) | (10,993) |  |
Allowance for Credit Losses | 0 | 0 |  |
Securities—available-for-sale | $ 220,852 | $ 211,525 |  |

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