EQUITY-BASED COMPENSATION (Shares Issued) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options (in shares)	1,684,318
Less: exercised/vested (in dollars per share)	$ 18.22
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	0
Restricted shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Less: exercised/vested (in dollars per share)	8.90
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	8.08
Common units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Less: exercised/vested (in dollars per share)	1.13
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 1.14
Manager
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options (in shares)	25,998
Manager \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options (in shares)	1,684,318	129,988	1,262,362
Fair value ($ millions)	$ 13.8	$ 0.7	$ 1.8
Expected term	10 years	10 years	10 years
Manager \| Stock options \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	44.78%	61.27%	21.45%
Risk free interest rate	1.34%	0.51%	1.45%
Expected dividend yield	3.16%	6.23%	6.58%
Manager \| Stock options \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	45.60%	62.12%	21.89%
Risk free interest rate	1.70%	0.76%	1.67%
Expected dividend yield	3.64%	11.79%	8.02%

Share-based Compensation Arrangement by Share-based Payment Award, Options, Shares Issued, Grant Date Fair Value

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Gross number of share options (or share units) granted during the period.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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