EMPLOYEE BENEFIT PLANS - Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Unrecognized prior service cost	$ 9	$ 74
Unrecognized net loss (gain)	(2)	(24)
Postretirement Medical Plans
Defined Benefit Plan Disclosure [Line Items]
Accumulated postretirement benefit obligation	(1,395)	(1,465)
Fair value of plan assets	0	0	$ 0
Funded status	(1,395)	(1,465)
Net amount recognized in consolidated balance sheet (after ASC 715) (included in "Other long-term obligations")	(1,395)	(1,465)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated postretirement benefit obligation	(1,660)	(1,589)
Fair value of plan assets	1,240	1,196
Funded status	(420)	(393)
Net amount recognized in consolidated balance sheet (after ASC 715) (included in "Other long-term obligations")	$ (420)	$ (393)

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

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Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

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Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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