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Notes Payable (Narrative) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) yr | Dec. 31, 2022 USD ($) yr | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2022 USD ($) | Apr. 01, 2022 USD ($) | Mar. 31, 2019 USD ($)
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net |  |  | $ 18,000 | $ 18,000 | $ 19,600 |  |  |  |
Unsecured Debt |  |  | 3,165,924 | 3,165,924 | 3,170,367 |  |  |  |
Total notes payable | [1] |  | 3,680,900 | 3,680,900 | 3,170,400 |  |  |  |
Loss on early retirement of debt |  |  |  | 0 | 0 | $ 176 |  |  |
Available amount under unsecured credit facility |  |  | $ 1,100,000 | $ 1,100,000 |  |  |  |  |
Weighted average interest rate on floating rate debt | [2] |  | 4.00% | 4.00% |  |  |  |  |
Weighted average maturity of indebtedness (including unsecured credit facility and unsecured short-term borrowings) (in years) | yr |  |  | 6.4 | 6.4 |  |  |  |  |
Repayments of Notes Payable |  |  |  | $ 350,000 | 0 | $ 100,000 |  |  |
Secured Debt |  |  | $ 514,989 | 514,989 | 0 |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net |  |  |  |  |  |  |  | $ 2,400 |
Amortization of Debt Discount (Premium) |  |  | 400 |  |  |  |  |  |
The Funds |  |  |  |  |  |  |  |  |
Secured Debt |  |  |  |  |  |  |  | $ 514,600 |
Letter Of Credit [Member] |  |  |  |  |  |  |  |  |
Maximum Ability to Issue Letters of Credit Under Unsecured Credit Facility |  |  | 50,000 | 50,000 |  |  |  |  |
Outstanding balance under credit facility |  |  | 14,200 | 14,200 |  |  |  |  |
Commercial Banks [Member] | Unsecured Credit Facility [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  | 42,000 | 42,000 | 0 |  |  |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  | 2,784,100 | 2,784,100 | 3,130,500 |  |  |  |
Secured Debt [Member] | Minimum [Member] | The Funds |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  |  |  |  | 2.47% |
Secured Debt [Member] | Maximum [Member] | The Funds |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  |  |  |  |  |  | 4.04% |
secured notes payable | The Funds |  |  |  |  |  |  |  |  |
Secured Debt |  |  |  |  |  |  |  | $ 514,600 |
Unsecured Credit Facility [Member] |  |  |  |  |  |  |  |  |
Value not exceeding the amount available under the unsecured credit facility |  |  |  | 600,000 |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  | $ 1,200,000 | $ 1,200,000 |  |  |  |  |
Terms Of Bid Rate Loans |  |  |  | 180 days |  |  |  |  |
Line of Credit Facility, Increase (Decrease), Net |  | $ 300,000 |  |  |  |  |  |  |
Unsecured Credit Facility [Member] | March 2019 Credit Agreement |  |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  |  |  | $ 900,000
Unsecured Credit Facility [Member] | Commercial Banks [Member] |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  | 5.13% | 5.13% |  |  |  |  |
Floating Rate Notes Payable [Member] |  |  |  |  |  |  |  |  |
Total notes payable | [3] |  | $ 566,900 | $ 566,900 | $ 39,900 |  |  |  |
Weighted average interest rate on floating rate debt |  |  | 5.50% | 5.50% | 1.90% |  |  |  |
5.31% Term loan Due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  | $ 39,800 | $ 39,800 | $ 39,900 |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Sep. 30, 2024 |  |  |  |  |
Notes payable, effective interest rate |  |  | 5.31% | 5.31% | 1.85% |  |  |  |
5.20% Term loan, due 2024 | Commercial Banks [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  | $ 300,000 | $ 300,000 | $ 0 |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Aug. 29, 2025 |  |  |  |  |
Notes payable, effective interest rate |  |  | 5.20% | 5.20% |  |  |  |  |
3.78% - 4.04% Conventional Mortgage Notes, due 2026 - 2028 | Secured Debt [Member] |  |  |  |  |  |  |  |  |
Secured Debt |  |  | $ 291,200 | $ 291,200 | 0 |  |  |  |
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% |  |  |  |  |
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% | 4.04% |  |  |  |  |
6.16% Variable Rate Notes, due 2026 | Secured Debt [Member] |  |  |  |  |  |  |  |  |
Notes payable, effective interest rate |  |  | 6.16% | 6.16% |  |  |  |  |
Secured Debt |  |  | $ 166,200 | $ 166,200 | 0 |  |  |  |
6.16% Variable Rate Notes, due 2026 | Secured Debt [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Apr. 01, 2026 |  |  |  |  |
6.16% Variable Rate Notes, due 2026 | Secured Debt [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Oct. 01, 2026 |  |  |  |  |
6.49% Variable Rate Construction Note, due 2024 | Secured Debt [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Jun. 20, 2024 |  |  |  |  |
Notes payable, effective interest rate |  |  | 6.49% | 6.49% |  |  |  |  |
Secured Debt |  |  | $ 18,900 | $ 18,900 | 0 |  |  |  |
3.87% note, due 2028 | Secured Debt [Member] |  |  |  |  |  |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Jan. 01, 2028 |  |  |  |  |
Notes payable, effective interest rate |  |  | 3.87% | 3.87% |  |  |  |  |
Secured Debt |  |  | $ 38,700 | $ 38,700 | 0 |  |  |  |
3.15% Notes Due 2022 | Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  | $ 0 | $ 0 | $ 349,300 |  |  |  |
Debt Instrument, Maturity Date |  |  |  | Dec. 15, 2022 |  |  |  |  |
Notes payable, effective interest rate |  |  | 3.15% | 3.15% | 3.15% |  |  |  |
Repayments of Notes Payable |  |  |  | $ 350,000 |  |  |  |  |
Term loan, due 2024 full value | Commercial Banks [Member] |  |  |  |  |  |  |  |  |
Unsecured Debt |  |  |  |  |  |  | $ 40,000 |  |
[1] | Unamortized debt discounts, debt issuance costs, and fair market value adjustments of $18.0 million and $19.6 million are included in senior unsecured notes payable as of December 31, 2022 and 2021, respectively.
[2] | Includes the effects of the applicable settled forward interest rate swaps.
[3] | Includes balances outstanding under our unsecured credit facility at December 31, 2022.

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 + Details
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