SECURITIES (Held to maturity securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 834,673	$ 829,403
Gross Unrealized Gains	2,775	3,096
Gross Unrealized Losses	(30,506)	(55,942)
Estimated Fair Value	806,942	776,557
Obligations of states and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	834,673	829,403
Gross Unrealized Gains	2,775	3,096
Gross Unrealized Losses	(30,506)	(55,942)
Estimated Fair Value	$ 806,942	$ 776,557