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SECURITIES (Schedule of Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 2,523,968 | $ 2,729,980
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3,380 | 2,074
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 289,409 | 358,271
Debt Securities, Available-for-Sale | 2,237,939 | 2,373,783
Held-to-maturity Securities, Amortized Cost | 1,014,210 | 1,059,387
Held-to-maturity Securities, Gross Unrealized Gains | 127 | 687
Held-to-maturity Securities, Gross Unrealized Losses | 134,752 | 152,228
Securities—held-to-maturity | 879,278 | 907,514
Allowance for Credit Losses | (307) | (332)
debt securities, held-to-maturity, accrued interest receivable | 3,800 | 4,500
Debt Securities, Available-for-Sale, Accrued Interest Receivable | 10,100 | 10,800
U.S. Government and agency obligations |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 8,897 | 34,929
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 412 | 740
Debt Securities, Available-for-Sale | 8,485 | 34,189
Held-to-maturity Securities, Amortized Cost | 304 | 307
Held-to-maturity Securities, Gross Unrealized Gains | 1 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 4 | 5
Securities—held-to-maturity | 301 | 302
Allowance for Credit Losses | 0 | 0
Municipal bonds |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 154,029 | 161,264
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,266 | 832
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 25,159 | 29,191
Debt Securities, Available-for-Sale | 130,136 | 132,905
Held-to-maturity Securities, Amortized Cost | 443,074 | 466,032
Held-to-maturity Securities, Gross Unrealized Gains | 126 | 687
Held-to-maturity Securities, Gross Unrealized Losses | 49,814 | 53,563
Securities—held-to-maturity | 393,238 | 412,999
Allowance for Credit Losses | (148) | (157)
Corporate bonds |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 131,354 | 131,291
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 0 | 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 8,073 | 12,168
Debt Securities, Available-for-Sale | 123,281 | 119,123
Held-to-maturity Securities, Amortized Cost | 2,689 | 2,781
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 8 | 20
Securities—held-to-maturity | 2,522 | 2,586
Allowance for Credit Losses | (159) | (175)
Mortgage-backed or related securities |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 2,030,089 | 2,179,947
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,872 | 942
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 255,764 | 314,175
Debt Securities, Available-for-Sale | 1,776,197 | 1,866,714
Held-to-maturity Securities, Amortized Cost | 568,143 | 590,267
Held-to-maturity Securities, Gross Unrealized Gains | 0 | 0
Held-to-maturity Securities, Gross Unrealized Losses | 84,926 | 98,640
Securities—held-to-maturity | 483,217 | 491,627
Allowance for Credit Losses | 0 | 0
Asset-backed securities |  |
Schedule of Securities [Line Items] |  |
Debt Securities, Available-for-sale, Amortized Cost | 199,599 | 222,549
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 242 | 300
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | 1 | 1,997
Debt Securities, Available-for-Sale | $ 199,840 | $ 220,852

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