EMPLOYEE RETIREMENT PLANS - Information Relating to the Company's Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Change in benefit obligation:
Benefit obligation, beginning of year	$ 78,527	$ 51,117
Service cost	1,675	1,092
Interest cost	1,165	1,285
Actuarial (gain) loss	(14,956)	25,033
Plan amendment	362	0
Benefit obligation, end of year	66,773	78,527
Fair value of plan assets	0	0
Unfunded status of the plan, end of year	(66,773)	(78,527)
Current liability	0	0
Non-current liability	$ 66,773	$ 78,527