Equity (Details) - USD ($)		9 Months Ended
	Aug. 31, 2017	Sep. 30, 2017	Mar. 31, 2018	Dec. 31, 2017	Feb. 17, 2017	Oct. 30, 2015
Equity, Class of Treasury Stock
Share repurchase program, authorized amount					$ 440,000,000.0	$ 400,000,000.0
Share repurchase program, additional authorized amount					$ 40,000,000.0
Preferred Stock, Shares Authorized			50,000,000	50,000,000
Common shares of beneficial interest, par value (in dollars per share)	$ 0.01		$ 0.01	$ 0.01
Share repurchase program, remaining authorized amount			$ 198,932,517
Series A Cumulative Preferred Stock [Member]
Equity, Class of Treasury Stock
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	12,879,475
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Share Price	$ 28.49
Preferred Stock, Shares Authorized			12,950,000	12,950,000
Partnership Interest [Member]
Equity, Class of Treasury Stock
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Share Price	$ 20.18
Business Acquisition, Common Units Issued or Issuable, Number of Units	215,152
Common Stock [Member]
Equity, Class of Treasury Stock
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	50,400,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Share Price	$ 20.18
RLJ Lodging Trust [Member] | Series A Cumulative Preferred Stock [Member]
Equity, Class of Treasury Stock
Preferred Stock, Dividend Rate, Per-Dollar-Amount		$ 1.95