Management Agreements and Leases - Marriott No. 5 (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) hotel agreement property	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | property	522
Hotels
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | hotel	323
Hotels | Marriott No. 5 contract
Property Subject to or Available for Operating Lease [Line Items]
Number of properties owned | property	1
Operating agreement annual rent and return | $	$ 10,159
Realized returns and rents | $	$ 10,159	$ 10,116	$ 10,116
Number of renewal options available | agreement	4
Term of renewal options	15 years