Consolidated Balance Sheets (Parenthetical) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 281,000	$ 1,142,000
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	$ 740,000,000
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	29,600,000
Preferred shares of beneficial interest, outstanding (in shares)	29,600,000	29,600,000
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)	130,905,132	130,813,750
Common shares of beneficial interest, outstanding (in shares)	130,905,132	130,813,750