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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Statement of Financial Position [Abstract]    
Common shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common shares of beneficial interest, shares authorized (in shares) 300,000,000 300,000,000
Common shares of beneficial interest, shares issued (in shares) 238,988,296 238,994,894
Common shares of beneficial interest, shares outstanding (in shares) 238,988,296 238,994,894