COMMITMENTS AND CONTINGENCIES (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)
COMMITMENTS AND CONTINGENCIES
Employee severance benefits	$ 6.0	$ 6.0
Insurance expense	1.5	3.2
Cash collateral for letters of credit	0.9	0.9
Non-depleting cash collateral	$ 1.5	$ 1.5

Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

No definition available.

Name:	us-gaap_SupplementalUnemploymentBenefitsSeveranceBenefits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant