Variable Interest Entities (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019		Mar. 31, 2019	Dec. 31, 2018
Assets:
Net real estate investments	$ 30,375,118	$ 31,119,271	[1]
Cash and cash equivalents	303,423	284,917	[1]
Receivables and other assets	934,951	757,748	[1]
Total assets	32,923,028	33,380,751	[1]
Liabilities and equity:
Secured debt	2,901,232	2,990,962	[1]
Lease liabilities	464,659	473,693	[1]
Total equity	17,066,337	16,506,627	[1]	$ 16,047,831	$ 15,586,599
Total liabilities and equity	32,923,028	33,380,751	[1]
VIE, Primary Beneficiary
Assets:
Net real estate investments	956,254	960,093
Cash and cash equivalents	23,539	27,522
Receivables and other assets	16,461	14,586
Total assets	996,254	1,002,201
Liabilities and equity:
Secured debt	458,191	460,117
Lease liabilities	1,326	1,326
Accrued expenses and other liabilities	20,569	22,215
Total equity	516,168	518,543
Total liabilities and equity	$ 996,254	$ 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.