Summary of Significant Accounting Policies - Segment and Geographic Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)	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	$ 823,337	$ 814,515
Net investments in real estate	19,188,902		$ 15,517,684
Outside the United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	195,400	179,100
Net investments in real estate	7,100,000		3,700,000
United States
Summary Of Significant Accounting Policies [Line Items]
Total operating revenues	627,900	$ 635,400
Net investments in real estate	$ 11,000,000		$ 10,600,000