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BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF ACCOUNTING POLICIES - Goodwill and Intangible Franchise Rights (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) region	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information
Goodwill impairment	$ 0	$ 0	$ 0
U.S and U.K
Segment Reporting Information
Number of geographic regions | region	2
Intangible Franchise Rights
Segment Reporting Information
Impairment of intangible assets	$ 0	$ 20,700,000	$ 19,000,000

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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