Management Agreements and Leases - InterContinental (Details) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($) hotel property	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) hotel property	Sep. 30, 2017 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2017 USD ($)
Management Agreements and Leases [Line Items]
Security deposit balance		$ 133,770		$ 133,770			$ 126,078
Capital improvements from leased facilities, funded				111,248	$ 89,955
Hotel
Management Agreements and Leases [Line Items]
Amount by which the cash flow available to pay the entity's minimum rent or return was more than the minimum amount		$ 21,321	$ 31,355	$ 47,901	67,052
InterContinental agreement | Hotel
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | hotel		100		100
Operating agreement annual rent and return				$ 190,521
Realized returns and rents		$ 47,630	46,404	142,316	131,649
Additional returns realized		6,653	$ 8,264	8,373	$ 11,836
Security deposit balance required to be maintained with entity		37,000		37,000
Amount by which the cash flow available to pay the entity's minimum rent or return was more than the minimum amount				100,000
Security deposit balance		$ 100,000		$ 100,000
Percentage increase in minimum returns				8.00%
Minimum | Hotel
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | property		1		1
Maximum | Hotel
Management Agreements and Leases [Line Items]
Number of real estate properties leased or managed | hotel		100		100
Forecast | InterContinental agreement | Hotel
Management Agreements and Leases [Line Items]
Capital improvements from leased facilities, funded	$ 44,600					$ 56,200