Management Agreements and Leases - Radisson Agreement (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) hotel	Mar. 31, 2018 USD ($)
Management Agreements and Leases [Line Items]
Capital improvements from leased facilities, funded	$ 11,738	$ 26,483
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	$ 0	1,275
Number of properties owned | hotel	327
Radisson Agreement | Hotel
Management Agreements and Leases [Line Items]
Number of properties owned | hotel	9
Operating agreement annual rent and return	$ 19,769
Realized returns and rents	4,831	3,230
Increase in guaranty, maximum	849
Guarantee provided to the entity, maximum	46,849
Increase (decrease) in guaranty	(2,646)
Guarantee provided to the entity, remaining amount	39,913
Capital improvements from leased facilities, funded	10,611	$ 0
Increase (decrease) in annual minimum returns and rents	$ 849