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SECURITIES (Reconciliation of amortized cost of held to maturity securities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss $ 1,705,120 $ 1,066,818
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 729 12,474
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (181,139) (15,159)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 1,524,710 1,064,133
US Government Agencies Debt Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 31,258 32,987
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 0
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (2,222) (441)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 29,036 32,546
US Treasury Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 100,634 102,560
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 6
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (11,755) (324)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 88,879 102,242
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 898,927 493,012
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 408 8,495
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (83,383) (4,271)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 815,952 497,236
Agency collateralized mortgage obligations [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 535,971 415,736
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 0 3,232
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (77,554) (10,123)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 458,417 408,845
Single issuer trust preferred securities issued by banks [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 1,500 1,500
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 8 8
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss 0 0
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value 1,508 1,508
Small Business Administration Pooled Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Held-to-Maturity, Excluding Accrued Interest, before Allowance for Credit Loss 136,830 21,023
Debt Securities, Held-to-maturity, Accumulated Unrecognized Gain 313 733
Debt Securities, Held-to-maturity, Accumulated Unrecognized Loss (6,225) 0
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Fair Value $ 130,918 $ 21,756