Basis of Presentation - Narratives (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) variableInterestEntity	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) variableInterestEntity	Sep. 30, 2019 USD ($)	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($) variableInterestEntity
Basis of Consolidation
Decrease in variable interest entity, count | variableInterestEntity			(5)
Variable interest entities, count | variableInterestEntity	13		13			18
Variable interest entities consolidated, count | variableInterestEntity	6		6			11
Variable interest entities unconsolidated, count | variableInterestEntity	7		7			7
Equity investments in real estate	$ 288,444		$ 288,444			$ 324,004
Uncollected rent receivable	5,500		14,000
Contractually deferred revenue	7,900		3,800
Distributions in excess of accumulated earnings	1,800,875		1,800,875			1,557,374
Cumulative effect of Adoption
Basis of Consolidation
Distributions in excess of accumulated earnings					$ (14,800)
Real Estate
Basis of Consolidation
Decrease in revenue	3,300		8,100
Decrease in operating expenses	1,800		4,300
Gross contract revenue	1,974	$ 9,538	9,368	$ 40,970
Real Estate | Hotel
Basis of Consolidation
Gross contract revenue	600	$ 7,400	5,300	$ 21,500
Variable Interest Entity
Basis of Consolidation
Equity investments in real estate	$ 340,600		$ 340,600			$ 298,300
Managed Programs
Basis of Consolidation
Variable interest entities unconsolidated, count | variableInterestEntity	2		2			2
Real Estate
Basis of Consolidation
Variable interest entities unconsolidated, count | variableInterestEntity	5		5			5
Equity investments in real estate	$ 236,862		$ 236,862			$ 194,437