Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 292,000	$ 431,000
Preferred shares of beneficial interest, par value (in usd per share)	$ 0.01	$ 0.01
Preferred shares of beneficial interest, liquidation preference value	$ 715,000,000	$ 715,000,000
Preferred shares of beneficial interest, authorized (in shares)	100,000,000	100,000,000
Preferred shares of beneficial interest, issued (in shares)	28,600,000	28,600,000
Preferred shares of beneficial interest, outstanding (in shares)	28,600,000	28,600,000
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)	123,632,667	126,345,293
Common shares of beneficial interest, outstanding (in shares)	123,632,667	126,345,293