EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost with interest to end of year	$ 113	$ 108	$ 79
Interest cost	55	62	26
Amortization of prior service cost	0	0	9
Amortization of (gain) loss	(10)	8	(2)
Total net periodic benefit cost	158	178	112
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost with interest to end of year	72	65	44
Interest cost	54	65	17
Expected return on plan assets	(40)	(42)	(37)
Total net periodic benefit cost	$ 86	$ 88	$ 24