Summary Of Significant Accounting Policies (Carrying Value Of Indebtedness And Corresponding Estimate Of Fair Value) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Sales-type lease receivable, net	$ 13,475	$ 12,811
Mortgage notes payable, net	3,275,974	3,272,368
Unsecured senior notes, net	10,488,568	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,197,173	730,000
Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	88,807	78,576
Carrying Amount [Member]
Summary Of Significant Accounting Policies [Line Items]
Sales-type lease receivable, net	13,475	12,811
Total	102,282	91,387
Mortgage notes payable, net	3,275,974	3,272,368
Unsecured senior notes, net	10,488,568	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,197,173	730,000
Total	14,961,715	14,240,336
Carrying Amount [Member] | Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	88,807	78,576
Estimated Fair Value [Member]
Summary Of Significant Accounting Policies [Line Items]
Sales-type lease receivable, net	13,257	13,045
Total	103,605	92,265
Mortgage notes payable, net	2,658,844	2,744,479
Unsecured senior notes, net	9,163,931	9,135,512
Unsecured line of credit	0	0
Unsecured term loan, net	1,195,007	730,000
Total	13,017,782	12,609,991
Estimated Fair Value [Member] | Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	$ 90,348	$ 79,220