Management Agreements and Leases - Marriott No. 5 (Details) - Hotel $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) hotel	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) agreement hotel	Sep. 30, 2017 USD ($)
Management Agreements and Leases [Line Items]
Number of properties owned | hotel	325		325
Marriott No 5 contract
Management Agreements and Leases [Line Items]
Number of properties owned | hotel	1		1
Operating agreement annual rent and return | $			$ 10,321
Realized returns and rents | $	$ 2,580	$ 2,540	$ 7,740	$ 7,620
Number of renewal options | agreement			4
Term of renewal options	15 years		15 years