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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Shareholders’ equity:    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common shares of beneficial interest, shares authorized (in shares) 200,000,000 200,000,000
Common shares of beneficial interest, shares issued (in shares) 48,425,265 48,425,665
Common shares of beneficial interest, shares outstanding (in shares) 48,425,265 48,425,665