PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS (Defined Benefit Retirement Plan) (Details) - Pension Plan - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
PENSION AND SUPPLEMENTAL EXECUTIVE RETIREMENT PLANS
Consecutive period of service considered for highest average annual salaries for calculation of benefits under the reactivated plan			60 months
Increase in unrecognized prior service cost due to reactivation of the plan			$ 5,900
Amortization period of increase in prior service cost			13 years
Settlement expense	$ 0	$ 4,884	$ 0	$ 4,884