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SECURITIES (Schedule of Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost $ 2,572,544 $ 2,729,980
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 1,261 2,074
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 376,112 358,271
Debt Securities, Available-for-Sale 2,197,693 2,373,783
Held-to-maturity Securities, Amortized Cost 1,023,342 1,059,387
Held-to-maturity Securities, Gross Unrealized Gains 72 687
Held-to-maturity Securities, Gross Unrealized Losses 170,391 152,228
Securities—held-to-maturity 852,709 907,514
Allowance for Credit Losses (314) (332)
debt securities, held-to-maturity, accrued interest receivable 4,200 4,500
Debt Securities, Available-for-Sale, Accrued Interest Receivable 10,000 10,800
U.S. Government and agency obligations    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 9,228 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 674 740
Debt Securities, Available-for-Sale 8,554 34,189
Held-to-maturity Securities, Amortized Cost 305 307
Held-to-maturity Securities, Gross Unrealized Gains 0 0
Held-to-maturity Securities, Gross Unrealized Losses 6 5
Securities—held-to-maturity 299 302
Allowance for Credit Losses 0 0
Municipal bonds    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 154,076 161,264
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 579 832
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 29,866 29,191
Debt Securities, Available-for-Sale 124,789 132,905
Held-to-maturity Securities, Amortized Cost 444,104 466,032
Held-to-maturity Securities, Gross Unrealized Gains 72 687
Held-to-maturity Securities, Gross Unrealized Losses 61,565 53,563
Securities—held-to-maturity 382,461 412,999
Allowance for Credit Losses (150) 157
Corporate bonds    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 131,333 131,291
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 10,606 12,168
Debt Securities, Available-for-Sale 120,727 119,123
Held-to-maturity Securities, Amortized Cost 2,719 2,781
Held-to-maturity Securities, Gross Unrealized Gains 0 0
Held-to-maturity Securities, Gross Unrealized Losses 18 20
Securities—held-to-maturity 2,537 2,586
Allowance for Credit Losses (164) 175
Mortgage-backed or related securities    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 2,069,774 2,179,947
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 57 942
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 334,966 314,175
Debt Securities, Available-for-Sale 1,734,865 1,866,714
Held-to-maturity Securities, Amortized Cost 576,214 590,267
Held-to-maturity Securities, Gross Unrealized Gains 0 0
Held-to-maturity Securities, Gross Unrealized Losses 108,802 98,640
Securities—held-to-maturity 467,412 491,627
Allowance for Credit Losses 0 0
Asset-backed securities    
Schedule of Securities [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 208,133 222,549
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 625 300
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 1,997
Debt Securities, Available-for-Sale $ 208,758 $ 220,852