EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Postretirement Medical Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 56	$ 54
Interest cost	28	31
Amortization of (gain) loss	(5)	4
Net periodic benefit cost	79	89
Defined Benefit Pension Plans | Chemogas Defined Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	37	32
Interest cost	28	32
Expected return on plan assets	(21)	(21)
Net periodic benefit cost	$ 44	$ 43