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Fair Value of Financial Instruments | 12 Months Ended
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Dec. 31, 2023
Fair Value Disclosures [Abstract] |
Fair Value of Financial Instruments | Fair Value of Financial Instruments The following methods and assumptions were used to estimate the fair value of each class of financial instrument for which it is practical to estimate that value. •Cash, cash equivalents and restricted cash - The carrying amount approximates fair value. •Borrowings under the Unsecured Credit Facility, Unsecured Term Loan due 2024 and Unsecured Term Loan due 2026 - The carrying amount approximates fair value because the borrowings are based on variable market interest rates. •Senior unsecured notes payable - The fair value of notes and bonds payable is estimated using cash flow analyses, based on the Company’s current interest rates for similar types of borrowing arrangements. •Mortgage notes payable - The fair value is estimated using cash flow analyses, based on the Company’s current interest rates for similar types of borrowing arrangements. •Interest rate swap agreements - Interest rate swap agreements are recorded in other assets on the Company's Consolidated Balance Sheets at fair value. Fair value, using level 2 inputs, is estimated by utilizing pricing models that consider forward yield curves and discount rates. The table below details the fair value and carrying values for our other financial instruments as of December 31, 2023 and 2022.
| December 31, 2023 | December 31, 2022
Dollars in millions | CARRYING VALUE | FAIR VALUE | CARRYING VALUE | FAIR VALUE
Notes and bonds payable 1, 2 | $ | 4,994.9 |  | $ | 4,872.7 |  | $ | 5,351.8 |  | $ | 5,149.6 |
Real estate notes receivable 1 | $ | 173.6 |  | $ | 172.5 |  | $ | 99.6 |  | $ | 99.6 |
1 Level 2 – model-derived valuations in which significant inputs and significant value drivers are observable in active markets. 2 Fair value for senior notes includes accrued interest as of December 31, 2023.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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