EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Postretirement Medical Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 27	$ 20
Interest cost	15	6
Amortization of prior service cost	2	2
Net periodic benefit cost	44	28
Defined Benefit Pension Plans | Chemogas Defined Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	16	11
Interest cost	16	5
Expected return on plan assets	(10)	(10)
Net periodic benefit cost	$ 22	$ 6