Management Agreements and Leases - Marriott No. 1 (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) hotel property	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | property		522
Capital improvements from leased facilities, funded		$ 131,120	$ 187,652	$ 180,703
Hotels
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | hotel		323
Marriott Agreement No. 1 | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | hotel		53
Operating agreement annual rent and return		$ 69,232
Realized returns and rents		68,944	68,514	68,154
Additional returns realized		6,180	$ 10,202	$ 3,177
Capital improvements from leased facilities, funded		$ 5,959
Percentage increase in minimum returns after funding for capital improvements		10.00%
Forecast | Marriott Agreement No. 1 | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Capital improvements from leased facilities, funded	$ 6,000