Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Preferred shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Total authorized for issuance number of preferred shares of beneficial interest (in shares)	50,000,000	50,000,000
Preferred shares of beneficial interest, issued (in shares)	0	0
Preferred shares of beneficial interest, outstanding (in shares)	0	0
Common shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0.01
Total authorized for issuance number of common shares of beneficial interest (in shares)	450,000,000	450,000,000
Common shares of beneficial interest, issued (in shares)	174,019,616	174,869,046
Preferred Stock, Liquidation Preference, Value	$ 328,266	$ 328,266
Limited Liability Company (LLC) Preferred Unit, Liquidation Value	$ 45,544	$ 45,430
Common shares of beneficial interest, outstanding (in shares)	174,019,616	174,869,046
Hotel and other receivables, allowance (in dollars)	$ 598	$ 510
Series A Cumulative Preferred Stock [Member]
Preferred shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 10.00
Total authorized for issuance number of preferred shares of beneficial interest (in shares)	12,950,000	12,950,000,000
Preferred shares of beneficial interest, issued (in shares)	12,879,475	12,879,475,000
Preferred shares of beneficial interest, outstanding (in shares)	12,879,475	12,879,475,000