Notes Payable (Narrative) (Details) $ in Thousands |
3 Months Ended | 6 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2025
USD ($)
yr
|
Jun. 30, 2024
USD ($)
|
Jun. 30, 2025
USD ($)
yr
|
Jun. 30, 2024
USD ($)
|
Dec. 31, 2024
USD ($)
|
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| Notes Payable | [1] | $ 3,826,000 | $ 3,826,000 | $ 3,485,600 | |||||||||||
| Unamortized debt discounts and debt issuance costs | 10,600 | 10,600 | 13,300 | ||||||||||||
| Available amount under unsecured credit facility | 1,200,000 | 1,200,000 | |||||||||||||
| Repayment of notes payable | 0 | $ 550,000 | |||||||||||||
| Loss on early retirement of debt | $ 0 | $ 0 | $ 0 | $ (921) | |||||||||||
| Weighted Average Interest Rate | [2],[3] | 4.10% | 4.10% | ||||||||||||
| Weighted average maturity of indebtedness (including unsecured line of credit) (in years) | yr | 5.1 | 5.1 | |||||||||||||
| Secured notes payable | $ 330,476 | $ 330,476 | 330,358 | ||||||||||||
| Unsecured notes payable | 3,495,487 | 3,495,487 | 3,155,233 | ||||||||||||
| Commercial Paper | 600,000 | 600,000 | |||||||||||||
| Letter Of Credit [Member] | |||||||||||||||
| Maximum Ability to Issue Letters of Credit Under Unsecured Credit Facility | 50,000 | 50,000 | |||||||||||||
| Commercial Banks [Member] | |||||||||||||||
| Unsecured notes payable | 555,500 | 555,500 | 217,900 | ||||||||||||
| Senior Unsecured Notes [Member] | |||||||||||||||
| Unsecured notes payable | 2,940,000 | 2,940,000 | 2,937,300 | ||||||||||||
| Secured Debt | |||||||||||||||
| Secured notes payable | 330,500 | $ 330,500 | 330,400 | ||||||||||||
| 5.14% Unsecured revolving credit facility | |||||||||||||||
| Terms Of Bid Rate Loans | 180 days | ||||||||||||||
| Value not exceeding the amount available under the line of credit | $ 600,000 | ||||||||||||||
| 5.14% Unsecured revolving credit facility | September 2022 Credit Agreement | |||||||||||||||
| Maximum borrowing capacity under unsecured credit facility | $ 1,200,000 | $ 1,200,000 | |||||||||||||
| 5.14% Unsecured revolving credit facility | Commercial Banks [Member] | |||||||||||||||
| Notes payable, effective interest rate | 5.14% | 5.14% | |||||||||||||
| Unsecured notes payable | $ 0 | $ 0 | 178,000 | ||||||||||||
| Floating rate notes payable [Member] | |||||||||||||||
| Notes Payable | [4] | $ 1,060,300 | $ 1,060,300 | $ 721,200 | |||||||||||
| Weighted Average Interest Rate | 5.10% | 5.10% | 5.60% | ||||||||||||
| 4.55% Commercial Paper Program | |||||||||||||||
| Debt Instrument, Term | 30 days | ||||||||||||||
| 4.55% Commercial Paper Program | Commercial Banks [Member] | |||||||||||||||
| Weighted Average Interest Rate | 4.55% | 4.55% | |||||||||||||
| Unsecured notes payable | $ 515,600 | $ 515,600 | $ 0 | ||||||||||||
| 5.65% Notes, due 2026 | Senior Unsecured Notes [Member] | |||||||||||||||
| Debt Instrument, Maturity Date | Nov. 03, 2026 | ||||||||||||||
| Notes payable, effective interest rate | 5.63% | 5.63% | |||||||||||||
| Unsecured notes payable | [5] | $ 504,800 | $ 504,800 | 503,300 | |||||||||||
| Hedged Asset, Fair Value Hedge | $ (6,300) | $ (6,300) | $ (5,300) | ||||||||||||
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