EMPLOYEE BENEFIT PLANS - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Net losses	$ (12,627)	$ (25,043)
Deferred income tax benefit	1,216	1,216
AOCI	(11,411)	(23,827)
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Net losses	(431)	(491)
Deferred income tax benefit	6	6
AOCI	$ (425)	$ (485)