EMPLOYEE BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost with interest to end of year	$ 115	$ 113	$ 108
Interest cost	71	55	62
Amortization of (gain) loss	(9)	(10)	8
Total net periodic benefit cost	177	158	178
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost with interest to end of year	215	72	65
Interest cost	81	54	65
Expected return on plan assets	(59)	(40)	(42)
Amortization of (gain) loss	4	0	0
Total net periodic benefit cost	$ 241	$ 86	$ 88