Variable Interest Entities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets:
Net real estate investments	$ 32,287,110	$ 28,474,947
Cash and cash equivalents	269,265	1,545,046
Receivables and other assets	803,453	629,031
Total assets	34,910,325	32,483,642
Liabilities and equity:
Secured debt	2,192,261	2,377,930
Lease liabilities	545,944	418,266
Accrued expenses and other liabilities	1,235,554	1,041,594
Total equity	18,596,579	16,881,572	$ 16,506,627	$ 15,586,599
Total liabilities and equity	34,910,325	32,483,642
VIE, Primary Beneficiary
Assets:
Net real estate investments	445,776	454,333
Cash and cash equivalents	9,964	15,547
Receivables and other assets	7,617	11,171
Total assets	463,357	481,051
Liabilities and equity:
Secured debt	163,519	165,671
Lease liabilities	1,324	1,325
Accrued expenses and other liabilities	12,394	14,997
Total equity	286,120	299,058
Total liabilities and equity	$ 463,357	$ 481,051