Segment and Geographic Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) segment	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segment	1
Number of Reportable Segments | segment	1
Operating Revenues	$ 1,127,322	$ 1,090,391
Investments in Real Estate	22,977,039		$ 22,569,930
Net Assets in Foreign Operations	3,200,000	3,900,000
Outside the United States
Segment Reporting Information [Line Items]
Operating Revenues	500,000	400,000
Investments in Real Estate	$ 9,800,000	$ 9,600,000
Outside the United States | Revenue | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk	41.00%	36.60%
United States
Segment Reporting Information [Line Items]
Operating Revenues	$ 700,000	$ 700,000
Investments in Real Estate	$ 11,200,000	$ 11,200,000