Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
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)	174,869,046	124,364,178
Preferred Stock, Liquidation Preference, Value	$ 328,266	$ 0
Limited Liability Company (LLC) Preferred Unit, Liquidation Value	$ 45,430	$ 0
Common shares of beneficial interest, outstanding (in shares)	174,869,046	124,364,178
Hotel and other receivables, allowance (in dollars)	$ 510	$ 182
Series A Cumulative Preferred Stock [Member]
Preferred shares of beneficial interest, par value (in dollars per share)	$ 0.01	$ 0
Total authorized for issuance number of preferred shares of beneficial interest (in shares)	12,950,000	0
Preferred shares of beneficial interest, issued (in shares)	12,879,475	0
Preferred shares of beneficial interest, outstanding (in shares)	12,879,475	0