Summary Of Significant Accounting Policies (Carrying Value Of Indebtedness And Corresponding Estimate Of Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	$ 78,336	$ 77,552
Notes receivable, net	9,641	18,729
Mortgage notes payable, net	3,267,914	2,909,081
Unsecured senior notes, net	9,483,695	9,639,287
Unsecured line of credit	145,000	0
Unsecured term loan, net	0	499,390
Total	3,300,000
Carrying Amount [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	78,336	77,552
Notes receivable, net	9,641	18,729
Total	87,977	96,281
Mortgage notes payable, net	3,267,914	2,909,081
Unsecured senior notes, net	9,483,695	9,639,287
Unsecured line of credit	145,000	0
Unsecured term loan, net	0	499,390
Total	12,896,609	13,047,758
Estimated Fair Value [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	82,867	84,579
Notes receivable, net	10,000	19,372
Total	92,867	103,951
Mortgage notes payable, net	3,395,569	3,144,150
Unsecured senior notes, net	9,966,591	10,620,527
Unsecured line of credit	145,317	0
Unsecured term loan, net	0	500,326
Total	$ 13,507,477	$ 14,265,003