EMPLOYEE BENEFIT PLANS - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Postretirement Medical Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 87	$ 84
Interest cost	53	41
Amortization of gain (loss)	(7)	(7)
Net periodic benefit cost	133	118
Defined Benefit Pension Plans | Chemogas Defined Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	161	58
Interest cost	61	43
Amortization of gain (loss)	3	0
Expected return on plan assets	(45)	(32)
Net periodic benefit cost	$ 180	$ 69