Management Agreements and Leases - Marriott No. 234 (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
Security deposit balance		$ 126,078	$ 89,338
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 No. 234 agreement | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | hotel		68
Operating agreement annual rent and return		$ 106,538
Realized returns and rents		106,405	$ 106,275	$ 106,146
Security deposits replenished and increased		64,700
Replenishment (utilization) of security deposit		9,491
Security deposit balance		$ 25,971
Guaranty payments threshold percentage of minimum returns		90.00%
Guarantee provided to the entity, remaining amount		$ 30,672
Capital improvements from leased facilities, funded		$ 1,975
Percentage increase in minimum returns after funding for capital improvements		9.00%
Forecast | Marriott No. 234 agreement | Hotels
Property Subject to or Available for Operating Lease [Line Items]
Capital improvements from leased facilities, funded	$ 8,680