Variable Interest Entities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Assets:
Net real estate investments	$ 29,276,536		$ 28,474,947	[1]
Cash and cash equivalents	513,602		1,545,046	[1]
Receivables and other assets	671,062		629,031	[1]
Total Assets	32,176,116		32,483,642	[1]
Liabilities and equity:
Secured debt	2,304,178		2,377,930	[1]
Lease liabilities	409,628		418,266	[1]
Total equity	16,850,829	$ 16,691,017	16,881,572	[1]	$ 16,936,527	$ 17,066,337	$ 16,506,627
Total liabilities and equity	32,176,116		32,483,642	[1]
VIE, Primary Beneficiary
Assets:
Net real estate investments	449,437		454,333
Cash and cash equivalents	12,469		15,547
Receivables and other assets	8,755		11,171
Total Assets	470,661		481,051
Liabilities and equity:
Secured debt	164,510		165,671
Lease liabilities	1,324		1,325
Accrued expenses and other liabilities	11,368		14,997
Total equity	293,459		299,058
Total liabilities and equity	$ 470,661		$ 481,051

[1] Note: The consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.