Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,142,000	$ 183,000
Preferred shares of beneficial interest, par value (in usd per share)	$ 0.01	$ 0.01
Preferred shares of beneficial interest, liquidation preference value	$ 740,000,000	$ 510,000,000
Preferred shares of beneficial interest, authorized (in shares)	100,000,000	100,000,000
Preferred shares of beneficial interest, issued (in shares)	29,600,000	20,400,000
Preferred shares of beneficial interest, outstanding (in shares)	29,600,000	20,400,000
Common shares of beneficial interest, par value (in usd per share)	$ 0.01	$ 0.01
Common shares of beneficial interest, authorized (in shares)	500,000,000	500,000,000
Common shares of beneficial interest, issued (in shares)	130,813,750	130,673,300
Common shares of beneficial interest, outstanding (in shares)	130,813,750	130,673,300