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Fair Value of Financial Instruments
12 Months Ended
Dec. 31, 2022
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, 2022 and 2021. 
 December 31, 2022December 31, 2021
Dollars in millionsCARRYING VALUEFAIR VALUECARRYING VALUEFAIR VALUE
Notes and bonds payable 1, 2
$5,351.8 $5,149.6 $1,801.3 $1,797.4 
Real estate notes receivable 1
$99.6 $99.6 $— $— 
1Level 2 – model-derived valuations in which significant inputs and significant value drivers are observable in active markets.
2Fair value for senior notes includes accrued interest as of December 31, 2022.