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Notes Payable (Summary Of Indebtedness) (Details) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2024 | Sep. 16, 2024 | Jan. 31, 2024 | Jan. 04, 2024 | Dec. 31, 2023 | Nov. 01, 2023
Total notes payable | [1] | $ 3,485,600 |  |  |  | $ 3,715,400 |
Unsecured Debt |  | 3,155,233 |  |  |  | 3,385,309 |
Secured Debt |  | 330,358 |  |  |  | 330,127 |
Value Of Real Estate Assets At Cost Subject To Secured Notes |  | 1,358,600 |  |  |  | 1,342,200 |
Commercial Banks [Member] |  |  |  |  |  |  |
Unsecured Debt |  | 217,900 |  |  |  | 339,900 |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Unsecured Debt |  | $ 2,937,300 |  |  |  | $ 3,045,400 |
5.52% Term loan Due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 5.52% |  |  |  | 1.85% |
Debt Instrument, Maturity Date |  | Sep. 30, 2026 |  |  |  |  |
Unsecured Debt |  | $ 39,900 |  |  |  | $ 39,900 |
6.21% Term loan, due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 6.21% | 6.21% |
Debt Instrument, Maturity Date |  | Aug. 29, 2024 |  |  |  |  |
Unsecured Debt |  | $ 0 |  |  |  | $ 300,000 |
Unsecured Credit Facility [Member] | Commercial Banks [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 5.14% |  |  |  |  |
4.36% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  | 4.36% |  | 4.36% |
Debt Instrument, Maturity Date |  | Jan. 15, 2024 |  |  |  |  |
Unsecured Debt |  |  |  |  |  | $ 250,000 |
3.68% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  | 3.68% |  |  | 3.68% |
Debt Instrument, Maturity Date |  | Sep. 16, 2024 |  |  |  |  |
Unsecured Debt |  | $ 0 |  |  |  | $ 249,700 |
6.69% Note, Due 2026 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 5.75% |  |  |  | 5.75% | 5.85%
Debt Instrument, Maturity Date |  | Nov. 03, 2026 |  |  |  |  |
Unsecured Debt | [2] | $ 503,300 |  |  |  | $ 508,600 |
3.74% Notes Due 2028 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 3.74% |  |  |  | 3.74% |
Debt Instrument, Maturity Date |  | Oct. 15, 2028 |  |  |  |  |
Unsecured Debt |  | $ 399,100 |  |  |  | $ 398,700 |
3.67% Notes due 2029 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 3.67% |  |  |  | 3.67% |
Debt Instrument, Maturity Date |  | Jul. 01, 2029 |  |  |  |  |
Unsecured Debt | [3] | $ 596,800 |  |  |  | $ 596,100 |
2.91% Notes due 2030 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 2.91% |  |  |  | 2.91% |
Debt Instrument, Maturity Date |  | May 15, 2030 |  |  |  |  |
Unsecured Debt |  | $ 746,000 |  |  |  | $ 745,400 |
5.06% Notes, due 2034 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 5.06% |  |  |  |  |
Debt Instrument, Maturity Date |  | Jan. 15, 2034 |  |  |  |  |
5.06% Notes, Due 2034 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Unsecured Debt |  | $ 395,200 |  |  |  | $ 0 |
3.41% Notes due 2049 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 3.41% |  |  |  | 3.41% |
Debt Instrument, Maturity Date |  | Nov. 01, 2049 |  |  |  |  |
Unsecured Debt |  | $ 296,900 |  |  |  | $ 296,900 |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] |  |  |  |  |  |  |
Secured Debt |  | $ 291,400 |  |  |  | 291,300 |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] | Minimum [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 3.78% |  |  |  |  |
Debt Instrument, Maturity Date |  | Oct. 01, 2026 |  |  |  |  |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] | Maximum [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 4.04% |  |  |  |  |
Debt Instrument, Maturity Date |  | Apr. 01, 2028 |  |  |  |  |
3.87% note, due 2028 | Secured Debt [Member] |  |  |  |  |  |  |
Notes payable, effective interest rate |  | 3.87% |  |  |  |  |
Debt Instrument, Maturity Date |  | Jan. 01, 2028 |  |  |  |  |
Secured Debt |  | $ 39,000 |  |  |  | 38,800 |
Unsecured Credit Facility [Member] | Commercial Banks [Member] |  |  |  |  |  |  |
Unsecured Debt |  | $ 178,000 |  |  |  | $ 0 |
[1] | Balances are decreased by unamortized debt discounts, debt issuance costs, and fair market value adjustments, net of $13.3 million and $5.5 million as of December 31, 2024 and 2023, respectively.
[2] | Balances are increased by $5.3 million and $11.6 million for fair value adjustments due to changes in benchmark interest rates related to these notes as of December 31, 2024 and 2023, respectively. See Note 9. "Derivative Financial Instruments and Hedging Activities," for further discussion.
[3] | The 2029 Notes have an effective annual interest rate of approximately 3.84% through June 2026, which includes the effect of a settled forward interest rate swap, and approximately 3.28% thereafter, for an all-in average effective rate of approximately 3.67%.

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