Summary Of Significant Accounting Policies (Carrying Value Of Indebtedness And Corresponding Estimate Of Fair Value) (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Summary Of Significant Accounting Policies [Line Items]
Note receivable, net		$ 2,274	$ 1,714
Sales-type lease receivable, net		13,943	13,704
Mortgage notes payable, net		4,368,367	4,166,379
Unsecured senior notes, net		9,794,527	10,491,617
Unsecured line of credit		0	0
Unsecured term loan, net		1,199,430	1,198,301
Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net		88,789	88,779
Carrying Amount [Member]
Summary Of Significant Accounting Policies [Line Items]
3-Month United States Treasury Bills	[1]	0	302,746
Sales-type lease receivable, net		13,943	13,704
Total		105,006	104,197
Mortgage notes payable, net		4,368,367	4,166,379
Unsecured senior notes, net		9,794,527	10,491,617
Unsecured line of credit		0	0
Unsecured term loan, net		1,199,430	1,198,301
Total		15,362,324	15,856,297
Carrying Amount [Member] | Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net		88,789	88,779
Carrying Amount [Member] | Nonrelated Party
Summary Of Significant Accounting Policies [Line Items]
Note receivable, net		2,274	1,714
Estimated Fair Value [Member]
Summary Of Significant Accounting Policies [Line Items]
3-Month United States Treasury Bills	[1]	0	302,746
Sales-type lease receivable, net		13,416	13,338
Total		106,247	105,608
Mortgage notes payable, net		3,935,382	3,705,513
Unsecured senior notes, net		8,979,934	9,697,393
Unsecured line of credit		0	0
Unsecured term loan, net		1,198,951	1,196,945
Total		14,114,267	14,599,851
Estimated Fair Value [Member] | Related Party
Summary Of Significant Accounting Policies [Line Items]
Related party note receivable, net		90,582	90,593
Estimated Fair Value [Member] | Nonrelated Party
Summary Of Significant Accounting Policies [Line Items]
Note receivable, net		$ 2,249	$ 1,677

[1] Per the guidance in ASC 326 “Financial Instruments — Credit Losses” (“ASC 326”), the Company concluded that the risk of nonpayment is nonexistent because the U.S. Government has a long history with no credit losses and therefore, no credit loss allowance was recorded.