EMPLOYEE BENEFIT PLANS - Schedule of Net Pension Cost (Credit) (Details) - United Kingdom - Pension Plan - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 422	$ 322
Expected return on plan assets	(629)	(504)
Amortization of prior service cost	8	9
Net periodic pension credit	$ (199)	$ (173)

Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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