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EQUITY-BASED COMPENSATION - Equity Options (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price			$ 20.50
Equity options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0.2	$ 4.3	$ 5.2
Class A Common Stock | Equity options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Price	$ 4.10	$ 9.28

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- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 1
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-Name Accounting Standards Codification
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-Section S99
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-SubTopic 10
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- Definition

Price of a single share of a number of saleable stocks of a company.

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