Summary of Significant Accounting Policies - Promotional Allowances (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Promotional allowances
Promotion value excluded from revenue	$ 33,639
Cost of complimentary services	10,203
Lodging
Promotional allowances
Promotion value excluded from revenue	9,687
Cost of complimentary services	1,291
Food And Beverage
Promotional allowances
Promotion value excluded from revenue	22,976
Cost of complimentary services	8,619
Other
Promotional allowances
Promotion value excluded from revenue	976
Cost of complimentary services	$ 293