Summary Of Significant Accounting Policies (Carrying Value Of Indebtedness And Corresponding Estimate Of Fair Value) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	$ 88,834	$ 78,576
Sales-type lease receivable, net	13,250	12,811
Mortgage notes payable, net	3,274,764	3,272,368
Unsecured senior notes, net	10,985,395	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,196,046	730,000
Carrying Amount [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	88,834	78,576
Sales-type lease receivable, net	13,250	12,811
Total	102,084	91,387
Mortgage notes payable, net	3,274,764	3,272,368
Unsecured senior notes, net	10,985,395	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,196,046	730,000
Total	15,456,205	14,240,336
Estimated Fair Value [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	90,500	79,220
Sales-type lease receivable, net	13,173	13,045
Total	103,673	92,265
Mortgage notes payable, net	2,765,657	2,744,479
Unsecured senior notes, net	9,751,688	9,135,512
Unsecured line of credit	0	0
Unsecured term loan, net	1,194,895	730,000
Total	$ 13,712,240	$ 12,609,991