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SHAREHOLDERS' EQUITY AND PARTNERS' CAPITAL - Common Stock and Common Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Shareholders Equity [Line Items]
Common stock authorized (shares)	350,000,000	350,000,000
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock issued (shares)	174,115,111	172,656,458
Common stock outstanding (shares)	174,115,111	172,656,458
Operating Partnership
Shareholders Equity [Line Items]
Common units outstanding (shares)	200,189,077	199,414,863
Operating Partnership | Common Units
Shareholders Equity [Line Items]
Noncontrolling interest conversion, calculation of trailing average of trading price, term (days)	5 days
Common Stock
Shareholders Equity [Line Items]
Common stock authorized (shares)	350,000,000
Common stock, par value (USD per share)	$ 0.01
Common stock issued (shares)	174,115,111	172,656,458
Common stock outstanding (shares)	174,115,111	172,656,458

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Noncontrolling Interest Conversion, Calculation of Trailing Average of Trading Price, Term

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Shareholders Equity [Line Items]

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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