Accounting Policies and Related Matters - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in operational cost	$ 18,192	$ 68,628
Cost of property operating expense		46,000
Allowance for credit loss on loans receivable	$ 84,895	$ 84,895	$ 68,372	$ 68,372	$ 68,372
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member	us-gaap:AccountingStandardsUpdate201613Member
Accounting Standards Update 2016-13 | Cumulative effect, period of adoption, adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit loss on loans receivable			$ 5,212		$ 0
COVID-19
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Rent collected percentage	99.00%
Percentage of rent cash collection	97.00%
Percentage of rent approved for deferral	2.00%
Percentage of deferred rent collected	99.00%