BASIS OF PRESENTATION (Details) - USD ($)	Dec. 31, 2020	Jan. 16, 2018
Summary Of Significant Accounting Policies [Line Items]
Deferred employer payroll taxes	$ 8,900,000
Accrued Liabilities
Summary Of Significant Accounting Policies [Line Items]
Deferred employer payroll taxes	4,500,000
Other Noncurrent Liabilities
Summary Of Significant Accounting Policies [Line Items]
Deferred employer payroll taxes	4,400,000
Senior Secured Revolving Credit Facility | Line of Credit
Summary Of Significant Accounting Policies [Line Items]
Current borrowing capacity	245,000,000
Credit facility	$ 1,000,000,000.0	$ 1,000,000,000.0