Variable Interest Entities (Details) - USD ($) $ in Thousands		Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019		Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets:
Net real estate investments		$ 29,155,194		$ 31,119,271	[1]
Cash and cash equivalents	[1]			284,917
Receivables and other assets		861,257		757,748	[1]
Total Assets		33,162,652		33,380,751	[1]
Liabilities and equity:
Secured debt	[1]			2,990,962
Lease liabilities		447,424		473,693	[1]
Total equity		16,936,527	$ 17,066,337	16,506,627	[1]	$ 15,969,572	$ 16,047,831	$ 15,586,599
Total liabilities and equity		33,162,652		33,380,751	[1]
VIE, Primary Beneficiary
Assets:
Net real estate investments		457,107		960,093
Cash and cash equivalents		30,438		27,522
Receivables and other assets		12,596		14,586
Total Assets		500,141		1,002,201
Liabilities and equity:
Secured debt		166,567		460,117
Lease liabilities		1,326		1,326
Accrued expenses and other liabilities		14,810		22,215
Total equity		317,438		518,543
Total liabilities and equity		$ 500,141		$ 1,002,201

[1] The consolidated balance sheet at December 31, 2019 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.