Description of the Business and Summary of Significant Accounting Policies - Management Fees (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Base management fee (as a percent)	2.00%
Total base management fee	$ 23.3	$ 22.0	$ 21.4
Incentive fees	$ 11.8	$ 6.1	$ 4.8
Gaylord Rockies [Member]
Business Acquisition [Line Items]
Base management fee (as a percent)	3.00%