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Fair Value Measurement of Financial Instruments
3 Months Ended
Mar. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurement of Financial Instruments Fair Value Measurement of Financial Instruments
Piedmont considers its cash and cash equivalents, tenant receivables, restricted cash and escrows, accounts payable and accrued expenses, interest rate swap agreements, and debt to meet the definition of financial instruments. The following table sets forth the carrying and estimated fair value for each of Piedmont’s financial instruments, as well as its level within the GAAP fair value hierarchy, as of March 31, 2023 and December 31, 2022, respectively (in thousands):

 March 31, 2023December 31, 2022
Financial InstrumentCarrying ValueEstimated
Fair Value
Level Within Fair Value HierarchyCarrying ValueEstimated
Fair Value
Level Within Fair Value Hierarchy
Assets:
Cash and cash equivalents (1)
$170,593 $170,593 Level 1$16,536 $16,536 Level 1
Tenant receivables, net (1)
$6,280 $6,280 Level 1$4,762 $4,762 Level 1
Restricted cash and escrows (1)
$4,183 $4,183 Level 1$3,064 $3,064 Level 1
Interest rate swaps$2,899 $2,899 Level 2$4,183 $4,183 Level 2
Liabilities:
Accounts payable and accrued expenses (1)
$20,184 $20,184 Level 1$63,225 $63,225 Level 1
Interest rate swaps$394 $394 Level 2$— $— Level 2
Debt, net$2,197,955 $2,018,146 Level 2$1,983,681 $1,825,723 Level 2

(1)For the periods presented, the carrying value of these financial instruments, net of applicable allowance, approximates estimated fair value due to their short-term maturity.

Piedmont's debt was carried at book value as of March 31, 2023 and December 31, 2022; however, Piedmont's estimate of its fair value is disclosed in the table above. Piedmont uses widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the debt facilities, including the period to maturity of each instrument, and uses observable market-based inputs for similar debt facilities which have transacted recently in the market. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). Scaling adjustments are
made to these inputs to make them applicable to the remaining life of Piedmont's outstanding debt. Piedmont has not changed its valuation technique for estimating the fair value of its debt.

Piedmont’s interest rate swap agreements presented above, and as further discussed in Note 4, are classified as “Interest rate swaps” in the accompanying consolidated balance sheets and were carried at estimated fair value as of March 31, 2023 and December 31, 2022. The valuation of these derivative instruments was determined using widely accepted valuation techniques including discounted cash flow analysis based on the contractual terms of the derivatives, including the period to maturity of each instrument, and uses observable market-based inputs, including interest rate curves and implied volatilities. Therefore, the estimated fair values determined are considered to be based on significant other observable inputs (Level 2). In addition, Piedmont considered both its own and the respective counterparties’ risk of nonperformance in determining the estimated fair value of its derivative financial instruments by estimating the current and potential future exposure under the derivative financial instruments as of the valuation date. The credit risk of Piedmont and its counterparties was factored into the calculation of the estimated fair value of the interest rate swaps; however, as of March 31, 2023 and December 31, 2022, this credit valuation adjustment did not comprise a material portion of the estimated fair value. Therefore, Piedmont believes that any unobservable inputs used to determine the estimated fair values of its derivative financial instruments are not significant to the fair value measurements in their entirety, and does not consider any of its derivatives to be Level 3 financial instruments.