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SECURITIES (Schedule of Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost $ 2,292,835 $ 2,460,262
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 6,442 1,091
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 280,752 356,842
Debt Securities, Available-for-Sale 2,018,525 2,104,511
Held-to-maturity Securities, Amortized Cost 971,901 1,001,861
Held-to-maturity Securities, Gross Unrealized Gains 41 36
Held-to-maturity Securities, Gross Unrealized Losses 156,210 176,072
Securities—held-to-maturity 815,434 825,528
Allowance for Credit Losses (298) (297)
debt securities, held-to-maturity, accrued interest receivable 3,600 4,200
Debt Securities, Available-for-Sale, Accrued Interest Receivable 8,000 9,000
U.S. Government and agency obligations    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 6,892 8,492
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 344 559
Debt Securities, Available-for-Sale 6,548 7,933
Held-to-maturity Securities, Amortized Cost 279 302
Held-to-maturity Securities, Gross Unrealized Gains 1 0
Held-to-maturity Securities, Gross Unrealized Losses 3 4
Securities—held-to-maturity 277 298
Allowance for Credit Losses 0 0
Municipal bonds    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 159,353 153,982
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 479 453
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 28,617 30,453
Debt Securities, Available-for-Sale 131,215 123,982
Held-to-maturity Securities, Amortized Cost 433,560 438,196
Held-to-maturity Securities, Gross Unrealized Gains 40 36
Held-to-maturity Securities, Gross Unrealized Losses 63,161 62,809
Securities—held-to-maturity 370,288 375,280
Allowance for Credit Losses (151) (143)
Corporate bonds    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 123,679 131,379
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 3,446 100
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 3,421 6,489
Debt Securities, Available-for-Sale 123,704 124,990
Held-to-maturity Securities, Amortized Cost 2,573 2,658
Held-to-maturity Securities, Gross Unrealized Gains 0 0
Held-to-maturity Securities, Gross Unrealized Losses 1 6
Securities—held-to-maturity 2,425 2,498
Allowance for Credit Losses (147) (154)
Mortgage-backed or related securities    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 1,868,033 1,995,805
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 2,313 383
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 248,370 319,340
Debt Securities, Available-for-Sale 1,621,976 1,676,848
Held-to-maturity Securities, Amortized Cost 535,489 560,705
Held-to-maturity Securities, Gross Unrealized Gains 0 0
Held-to-maturity Securities, Gross Unrealized Losses 93,045 113,253
Securities—held-to-maturity 442,444 447,452
Allowance for Credit Losses 0 0
Asset-backed securities    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 134,878 170,604
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 204 155
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 1
Debt Securities, Available-for-Sale $ 135,082 $ 170,758