PENSION AND POST-RETIREMENT PLANS - DEFINED CONTRIBUTION PLANS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
401 K plan
Defined Contribution Plans
Employer matching contribution (as a percent)	3.00%
Employer matching contribution expenses	$ 3.2	$ 3.0	$ 2.9
Profit sharing plan
Defined Contribution Plans
Profit sharing expense recorded	$ 2.5	$ 2.2	$ 0.5