XML 13 R3.htm IDEA: XBRL DOCUMENT v3.21.2
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2021
Dec. 31, 2020
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) 238,374,572 238,268,478
Common shares of beneficial interest, shares outstanding (in shares) 238,374,572 238,268,478