PENSION AND RETIREMENT PLANS LIABILITIES - SERP (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Unrealized gain/loss due to change in fair value of SERP liabilities	$ (576)	$ (195)	$ (17,254)	$ (390)
Non-qualified Supplemental Retirement Plan ("SERP")
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,400		25,400		$ 24,200
Trading gains (losses), net	808	(2,600)	1,200	(4,100)
SERP Liabilities	23,500		23,500		$ 23,100
Unrealized gain/loss due to change in fair value of SERP liabilities	$ 872	$ (2,500)	1,300	$ 3,900
Retirement Income Plan
Defined Benefit Plan Disclosure [Line Items]
Cash contribution			$ 5,400