Fair Value of Financial Instruments	9 Months Ended
Fair Value of Financial Instruments	Sep. 30, 2021
Fair Value of Financial Instruments [Abstract]
Fair Value of Financial Instruments	NOTE E – Fair Value of Financial Instruments The fair values of our cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, accounts payable and customer deposits approximate their carrying values due to their short-term nature. The assets related to our self-directed, non-qualified deferred compensation plans for certain executives and employees are valued using quoted market prices multiplied by the number of shares held, a Level 1 valuation technique. The assets related to our deferred compensation plans totaled approximately $9.2 million at September 30, 2021 and $7.9 million at December 31, 2020 and are included in other assets. Amounts for the related liabilities are included in other liabilities and totaled approximately $9.2 million at September 30, 2021 and $8.1 million at December 31, 2020.

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.