EMPLOYEE BENEFIT PLANS (Details) $ in Thousands		3 Months Ended
	Jan. 01, 2021 plan	Mar. 31, 2022 USD ($) plan	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of savings plan | plan	1	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Benefit obligation		$ 1,197		$ 1,293
Deferred compensation liability		8,206		6,270
Related rabbi trust assets		8,208		6,267
Maximum
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Historical cash payments for retirement medical plan claims per year		$ 200
Postretirement Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Number of defined benefit plans | plan		2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		$ 20	$ 22
Interest cost		6	6
Amortization of prior service cost		2	18
Amortization of gain		0	(6)
Net periodic benefit cost		28	40
Defined Benefit Pension Plan | Chemogas Defined Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		11	17
Interest cost		5	4
Expected return on plan assets		(10)	(9)
Amortization of gain		0	1
Net periodic benefit cost		6	$ 13
Benefit obligation		$ 676		$ 684