EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Postretirement Medical Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 81	$ 59
Interest cost	46	20
Amortization of prior service cost	0	6
Amortization of loss	6	0
Net periodic benefit cost	133	85
Defined Benefit Pension Plans | Chemogas Defined Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	46	30
Interest cost	47	12
Expected return on plan assets	(30)	(26)
Net periodic benefit cost	$ 63	$ 16