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Notes Payable (Narrative) (Details) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 16, 2024 USD ($) | Jan. 04, 2024 USD ($) | Jan. 31, 2024 USD ($) | Dec. 31, 2024 USD ($) yr | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Nov. 01, 2023 USD ($) | Sep. 30, 2022 USD ($) | Apr. 01, 2022 USD ($)
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  |  |  |  | $ 13,300 | $ 5,500 |  |  |  |
Unsecured notes payable |  |  |  |  | 3,155,233 | 3,385,309 |  |  |  |
Total notes payable | [1] |  |  |  | 3,485,600 | 3,715,400 |  |  |  |
Loss on early retirement of debt |  |  |  |  | 921 | 2,513 | $ 0 |  |  |
Available amount under unsecured credit facility |  |  |  |  | $ 1,000,000 |  |  |  |  |
Weighted average interest rate on floating rate debt | [2],[3] |  |  |  | 4.10% |  |  |  |  |
Weighted average maturity of indebtedness (including unsecured credit facility and unsecured short-term borrowings) (in years) | yr |  |  |  |  | 6.2 |  |  |  |  |
Repayments of Notes Payable |  |  |  |  | $ 800,000 | 437,749 | $ 350,000 |  |  |
Secured notes payable |  |  |  |  | 330,358 | 330,127 |  |  |  |
Amortization of Debt Discount (Premium) |  |  |  |  |  | 400 |  |  |  |
The Funds |  |  |  |  |  |  |  |  |  |
Secured notes payable |  |  |  |  |  |  |  |  |  | $ 514,600
Letter Of Credit [Member] |  |  |  |  |  |  |  |  |  |
Maximum Ability to Issue Letters of Credit Under Unsecured Credit Facility |  |  |  |  | 50,000 |  |  |  |  |
Outstanding balance under credit facility |  |  |  |  | 27,500 |  |  |  |  |
Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | 217,900 | 339,900 |  |  |  |
Commercial Banks [Member] | Unsecured Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | 178,000 | 0 |  |  |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | 2,937,300 | 3,045,400 |  |  |  |
Unsecured Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Value not exceeding the amount available under the unsecured credit facility |  |  |  |  | $ 600,000 |  |  |  |  |
Terms Of Bid Rate Loans |  |  |  |  | 180 days |  |  |  |  |
Unsecured Credit Facility [Member] | August 2022 Credit Agreement |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  | $ 1,200,000 |  |  |  |  |
Unsecured Credit Facility [Member] | Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 5.14% |  |  |  |  |
Floating Rate Notes Payable [Member] |  |  |  |  |  |  |  |  |  |
Total notes payable | [4] |  |  |  | $ 721,200 | $ 848,500 |  |  |  |
Weighted average interest rate on floating rate debt |  |  |  |  | 5.60% | 6.50% |  |  |  |
5.52% Term loan Due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | $ 39,900 | $ 39,900 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Sep. 30, 2026 |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 5.52% | 1.85% |  |  |  |
6.21% Term loan, due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | $ 0 | $ 300,000 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Aug. 29, 2024 |  |  |  |  |
Notes payable, effective interest rate |  |  | 6.21% |  |  | 6.21% |  |  |  |
Repayments of Notes Payable |  |  | $ 300,000 |  |  |  |  |  |  |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |
Secured notes payable |  |  |  |  | $ 291,400 | $ 291,300 |  |  |  |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Oct. 01, 2026 |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 3.78% |  |  |  |  |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Apr. 01, 2028 |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 4.04% |  |  |  |  |
3.87% note, due 2028 | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Jan. 01, 2028 |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 3.87% |  |  |  |  |
Secured notes payable |  |  |  |  | $ 39,000 | 38,800 |  |  |  |
Term loan, due 2024 full value | Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  |  |  |  |  | $ 40,000 |
6.69% Note, Due 2026 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable | [5] |  |  |  | $ 503,300 | $ 508,600 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Nov. 03, 2026 |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  | 5.75% | 5.75% |  | 5.85% |  |
Debt Instrument, Face Amount |  |  |  |  |  |  |  | $ 500,000 |  |
Derivative, Notional Amount |  |  |  |  |  |  |  | $ 500,000 |  |
Secured variable rate notes | Secured Debt [Member] |  |  |  |  |  |  |  |  |  |
Loss on early retirement of debt |  |  |  |  | $ (900) |  |  |  |  |
Four Point Nine Percentage Notes Due 2034 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  | 4.90% |  |  |  |  |  |  |
Debt Instrument, Face Amount |  |  | $ 400,000 |  |  |  |  |  |  |
Discounted notes payable face amount |  |  | 99.638% |  |  |  |  |  |  |
Debt Instrument, Interest Rate During Period |  |  | 4.946% |  |  |  |  |  |  |
Proceeds from Issuance of Debt |  |  | $ 394,800 |  |  |  |  |  |  |
4.36% Notes Due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |  |  |  |
Repayments of Notes Payable |  |  |  | $ 250,000 |  |  |  |  |  |
4.36% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  |  | $ 250,000 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Jan. 15, 2024 |  |  |  |  |
Notes payable, effective interest rate |  |  |  | 4.36% |  | 4.36% |  |  |  |
Repayments of Notes Payable |  |  |  | $ 0 |  |  |  |  |  |
3.68% Notes Due 2024 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |
Unsecured notes payable |  |  |  |  | $ 0 | $ 249,700 |  |  |  |
Debt Instrument, Maturity Date |  |  |  |  | Sep. 16, 2024 |  |  |  |  |
Notes payable, effective interest rate |  | 3.68% |  |  |  | 3.68% |  |  |  |
Repayments of Notes Payable |  | $ 250,000 |  |  |  |  |  |  |  |
[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] | Includes the effects of the applicable settled derivatives.
[3] | Includes all available extension options.
[4] | Includes the senior unsecured notes payable and a term loan due in 2026 at December 31, 2024 and 2023, and includes balances outstanding under our unsecured revolving credit facility at December 31, 2024. At December 31, 2023, amount also includes a term loan due in 2024.
[5] | 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.

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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