EMPLOYEE BENEFIT PLANS - Postretirement Benefits Other than Pensions, Plans, Amendments and Obligations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Threshold for unrecognized amount of actuarial gains and losses as a proportion of projected benefit obligation (as a percent)	10.00%
Executive Benefit Restoration Plan
Postretirement medical benefit and postemployment medical benefit obligations
Executive benefit restoration/ postretirement and/or postemployment medical obligations at beginning of period	$ 8,485	$ 9,852
Service cost	323	468
Interest cost	441	300
Plan amendments	0	308
Curtailment	0	(292)
Benefit payments	0	(110)
Actuarial (gain) loss	909	(2,041)
Executive benefit restoration/ postretirement and/or postemployment medical obligations at end of period	10,158	8,485
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year	9,808	8,640
Employer contributions	0	1,734
Benefits paid	0	(109)
Actual return on plan assets	490	(457)
Fair value of plan assets at end of year	10,298	9,808
Net (asset) liability recognized	(140)	(1,323)
Medical Plans
Postretirement medical benefit and postemployment medical benefit obligations
Executive benefit restoration/ postretirement and/or postemployment medical obligations at beginning of period	2,189
Executive benefit restoration/ postretirement and/or postemployment medical obligations at end of period	1,167	2,189
Postretirement Medical Benefit Plans
Postretirement medical benefit and postemployment medical benefit obligations
Executive benefit restoration/ postretirement and/or postemployment medical obligations at beginning of period	2,092	2,809
Interest cost	58	47
Benefit payments	(469)	(732)
Actuarial (gain) loss	(757)	(32)
Executive benefit restoration/ postretirement and/or postemployment medical obligations at end of period	924	2,092
Postemployment Medical Benefit Plans
Postretirement medical benefit and postemployment medical benefit obligations
Executive benefit restoration/ postretirement and/or postemployment medical obligations at beginning of period	97
Executive benefit restoration/ postretirement and/or postemployment medical obligations at end of period	$ 243	$ 97