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SECURITIES (Reconciliation of fair value of Available for Sale securities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale, Amortized Cost $ 1,459,862 $ 1,566,779
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 30 54
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (125,636) (167,679)
Debt Securities, Available-for-Sale 1,334,256 1,399,154
Debt Securities, Available-for-Sale, 1,459,862 1,566,779
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
US Government Agencies Debt Securities [Member]    
Debt Securities, Available-for-sale, Amortized Cost 230,198 230,936
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0  
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (23,060) (28,636)
Debt Securities, Available-for-Sale 207,138 202,300
Debt Securities, Available-for-Sale, 230,198 230,936
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
US Treasury Securities [Member]    
Debt Securities, Available-for-sale, Amortized Cost 824,597 874,035
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (55,495) (82,694)
Debt Securities, Available-for-Sale 769,102 791,341
Debt Securities, Available-for-Sale, 824,597 874,035
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Debt Securities, Available-for-sale, Amortized Cost 314,269 359,068
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 24 54
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (37,246) (45,434)
Debt Securities, Available-for-Sale 277,047 313,688
Debt Securities, Available-for-Sale, 314,269 359,068
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Agency collateralized mortgage obligations [Member]    
Debt Securities, Available-for-sale, Amortized Cost 35,713 41,874
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 6  
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (2,530) (3,031)
Debt Securities, Available-for-Sale 33,189 38,843
Debt Securities, Available-for-Sale, 35,713 41,874
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
US States and Political Subdivisions Debt Securities [Member]    
Debt Securities, Available-for-sale, Amortized Cost 195 193
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (5) (2)
Debt Securities, Available-for-Sale 190 191
Debt Securities, Available-for-Sale, 195 193
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Pooled Trust Preferred Securities Issued By Banks And Insurers [Member]    
Debt Securities, Available-for-sale, Amortized Cost 1,188 1,203
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (170) (169)
Debt Securities, Available-for-Sale 1,018 1,034
Debt Securities, Available-for-Sale, 1,188 1,203
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest 0 0
Small Business Administration Pooled Securities [Member]    
Debt Securities, Available-for-sale, Amortized Cost 53,702 59,470
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (7,130) (7,713)
Debt Securities, Available-for-Sale 46,572 51,757
Debt Securities, Available-for-Sale, 53,702 59,470
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest $ 0 $ 0