Management Agreements and Leases - Guarantees and Security Deposits Generally (Details) - Hotel - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Management Agreements and Leases [Line Items]
Amount by which the cash flow available to pay the entity's minimum rent or return was less than the minimum amount	$ 9,216	$ 5,699	$ 31,030	$ 18,971
Reduction of hotel operating expenses	299	0	2,377	2,689
Shortfalls due to unguaranteed portions of minimum returns	9,818	5,699	28,653	16,282
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
Increase in guarantee provided and security deposit to the entity	$ 5,204	$ 10,099	$ 14,299	$ 26,319