Summary Of Significant Accounting Policies (Carrying Value Of Indebtedness And Corresponding Estimate Of Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	$ 78,544	$ 78,576
Sales-type lease receivable, net	13,028	12,811
Mortgage notes payable, net	3,273,553	3,272,368
Unsecured senior notes, net	10,240,967	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,194,916	730,000
Carrying Amount [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	78,544	78,576
Sales-type lease receivable, net	13,028	12,811
Total	91,572	91,387
Mortgage notes payable, net	3,273,553	3,272,368
Unsecured senior notes, net	10,240,967	10,237,968
Unsecured line of credit	0	0
Unsecured term loan, net	1,194,916	730,000
Total	14,709,436	14,240,336
Estimated Fair Value [Member]
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net	79,472	79,220
Sales-type lease receivable, net	13,086	13,045
Total	92,558	92,265
Mortgage notes payable, net	2,826,826	2,744,479
Unsecured senior notes, net	8,759,487	9,135,512
Unsecured line of credit	0	0
Unsecured term loan, net	1,200,000	730,000
Total	$ 12,786,313	$ 12,609,991