EMPLOYEE BENEFIT PLANS - Postretirement Benefits Other than Pensions - Obligations (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($) plan
Medical Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Total postretirement and postemployment medical obligations at end of period	$ 1,016
Postretirement Medical Benefit Plans
Defined Contribution Plan Disclosure [Line Items]
Threshold of unrecognized amount of actuarial gains and losses as a proportion of projected benefit obligation (as a percent)	10.00%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Postretirement medical benefit obligation at beginning of period	$ 924
Interest cost	29
Benefit payments (net of contributions by participants)	(180)
Total postretirement and postemployment medical obligations at end of period	773
Postemployment Medical Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Total postretirement and postemployment medical obligations at end of period	$ 243
Executive Benefit Restoration Plan
Defined Contribution Plan Disclosure [Line Items]
Threshold of unrecognized amount of actuarial gains and losses as a proportion of projected benefit obligation (as a percent)	10.00%
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Postretirement medical benefit obligation at beginning of period	$ 10,158
Interest cost	220
Benefit payments (net of contributions by participants)	(898)
Total postretirement and postemployment medical obligations at end of period	$ 9,628
Non-bargaining unit employees | Medical Benefit Plans
Defined Contribution Plan Disclosure [Line Items]
Number of plans | plan	3
Non-bargaining unit employees | Medical Benefit Plans | Maximum
Defined Contribution Plan Disclosure [Line Items]
Qualifying age	65 years
Non-bargaining unit employees | Postretirement Medical Benefit Plans
Defined Contribution Plan Disclosure [Line Items]
Number of plans | plan	2
Non-bargaining unit employees | Postretirement Medical Benefit Plans | Minimum
Defined Contribution Plan Disclosure [Line Items]
Qualifying age	55 years
Non-bargaining unit employees | Postemployment Medical Benefit Plans
Defined Contribution Plan Disclosure [Line Items]
Number of plans | plan	3