DISCONTINUED OPERATIONS - Gain on the Sale of the MST Franchise (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds to be paid in January 2023	$ 690,580		$ 688,156
Discontinued Operations, Disposed of by Sale | MST Franchise
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash proceeds	20,000
Proceeds to be paid in January 2023	5,000
Total cash proceeds net	25,000
Less transaction costs:	(4,247)
Less book value of sold assets	(7,748)
Gain on sale, before income taxes	13,005	$ 0
Income tax expense	0
Gain on sale net of tax	$ 13,005