EMPLOYEE BENEFIT PLANS - Non-qualified deferred compensation plan assets fair value (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Deferred Compensation Plan Assets	$ 27,236	$ 24,485
Level 1
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Deferred Compensation Plan Assets	25	25
NAV
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Deferred Compensation Plan Assets	$ 27,211	$ 24,460