Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

v3.20.4
CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 31, 2020
Dec. 31, 2019
Statement of Financial Position [Abstract]    
Preferred shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Preferred shares of beneficial interest, authorized (in shares) 50,000,000 50,000,000
Preferred shares of beneficial interest, issued (in shares) 8,732,719 8,727,119
Preferred shares of beneficial interest, outstanding (in shares) 8,732,719 8,727,119
Common shares of beneficial interest, par value (in dollars per share) $ 0.01 $ 0.01
Common shares of beneficial interest, authorized (in shares) 250,000,000 250,000,000
Common shares of beneficial interest, issued (in shares) 71,293,117 59,659,108
Common shares of beneficial interest, outstanding (in shares) 71,293,117 59,659,108