Summary of Significant Accounting Policies - Segment and Geographic Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment			1
Number of reportable segments | segment			1
Total operating revenues	$ 992,995	$ 800,797	$ 1,816,332	$ 1,615,312
Net investments in real estate	19,620,509		19,620,509		$ 15,517,684
Outside the United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	342,000	150,100	537,500	329,200
Net investments in real estate	7,500,000		7,500,000		3,700,000
United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	650,900	$ 650,700	1,300,000	$ 1,300,000
Net investments in real estate	$ 11,100,000		$ 11,100,000		$ 10,600,000