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SECURITIES (Schedule of Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Schedule of Securities [Line Items] |  |
Debt Securities, Trading, Amortized Cost | $ 27,203 | $ 27,203
Securities—trading | 25,268 | 28,694
Debt Securities, Available-for-sale, Amortized Cost, Total | 2,774,972 | 3,218,777
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 207 | 1,463
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 486,436 | 431,209
Debt Securities, Available-for-sale, Allowance for Credit Loss | (750) | 0
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | 2,287,993 | 2,789,031
Held-to-maturity Securities, Amortized Cost | 1,082,505 | 1,117,967
Held-to-maturity Securities, Gross Unrealized Gains | 12 | 109
Held-to-maturity Securities, Gross Unrealized Losses | 228,515 | 175,896
Securities—held-to-maturity | 853,653 | 942,180
Allowance for Credit Losses | (349) | (379)
debt securities, held-to-maturity, accrued interest receivable | 4,200 | 4,800
Debt Securities, Available-for-Sale, Accrued Interest Receivable | 11,000 | 12,400
U.S. Government and agency obligations |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost, Total | 35,342 | 56,344
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 1,015 | 1,244
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | 34,327 | 55,108
Held-to-maturity Securities, Amortized Cost | 308 | 312
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 8 | 7
Securities—held-to-maturity | 300 | 305
Allowance for Credit Losses | 0 | 0
Municipal bonds |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost, Total | 166,902 | 301,449
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 530
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 43,304 | 40,770
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | 123,598 | 261,209
Held-to-maturity Securities, Amortized Cost | 491,152 | 503,117
Held-to-maturity Securities, Gross Unrealized Gains | 12 | 109
Held-to-maturity Securities, Gross Unrealized Losses | 95,444 | 70,907
Securities—held-to-maturity | 395,551 | 432,319
Allowance for Credit Losses | (169) | 183
Corporate bonds |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Trading, Amortized Cost | 27,203 | 27,203
Securities—trading | 25,268 | 28,694
Debt Securities, Available-for-sale, Amortized Cost, Total | 106,015 | 133,334
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 14,247 | 11,481
Debt Securities, Available-for-sale, Allowance for Credit Loss | (750) |
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | 91,018 | 121,853
Held-to-maturity Securities, Amortized Cost | 2,813 | 2,961
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 27 | 16
Securities—held-to-maturity | 2,606 | 2,945
Allowance for Credit Losses | (180) | 196
Mortgage-backed or related securities |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost, Total | 2,244,179 | 2,505,172
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 885
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 424,727 | 366,721
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | 1,819,452 | 2,139,336
Held-to-maturity Securities, Amortized Cost | 588,232 | 611,577
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 133,036 | 104,966
Securities—held-to-maturity | 455,196 | 506,611
Allowance for Credit Losses | 0 | 0
Asset-backed securities |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost, Total | 222,534 | 222,478
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 207 | 40
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 3,143 | 10,993
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |
Securities—available-for-sale, net of allowance for credit losses of $750 and none, respectively; amortized cost $2,774,972 and $3,218,777, respectively | $ 219,598 | $ 211,525

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