Description of Business and Summary of Significant Accounting Policies - Acquisitions and Investments - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)	Dec. 31, 2014 USD ($) Room	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Total Debt	$ 1,591,392		$ 1,502,554
AC Hotel Note Payable [Member]
Business Acquisition [Line Items]
Total Debt		$ 6,000		$ 6,000
Aloft Hotel National Harbor [Member]
Business Acquisition [Line Items]
Number of room purchased | Room		192
Purchase price of hotel		$ 21,800
Hotel opened date	2015-04