FAIR VALUE MEASUREMENTS	6 Months Ended
FAIR VALUE MEASUREMENTS	Jun. 30, 2018
FAIR VALUE MEASUREMENTS
FAIR VALUE MEASUREMENTS	NOTE K — FAIR VALUE MEASUREMENTS Fair Value Measurements We follow the authoritative guidance for financial assets and liabilities, which establishes a framework for measuring fair value and requires enhanced disclosures about fair value measurements. The authoritative guidance requires disclosure about how fair value is determined for assets and liabilities and establishes a hierarchy by which these assets and liabilities must be categorized, based on significant levels of inputs as follows: Level 1 consists of securities for which there are quoted prices in active markets for identical securities; Level 2 consists of securities for which observable inputs other than Level 1 inputs are used, such as quoted prices for similar securities in active markets or quoted prices for identical securities in less active markets and model-derived valuations for which the variables are derived from, or corroborated by, observable market data; and Level 3 consists of securities for which there are no observable inputs to the valuation methodology that are significant to the measurement of the fair value. The determination of where assets and liabilities fall within this hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Financial Instruments We hold investments in money market funds which are measured at fair value on a recurring basis. As of June 30, 2018 and December 31, 2017, $2.3 million and $3.3 million, respectively, of money market funds which are restricted from general use are presented within “Other current assets.” The fair values of our money market funds are based on Level 1 observable market prices and are equivalent to one dollar per share. The carrying value of accounts receivable and accounts payable approximate their fair values based on the short-term nature of these instruments. In March 2018, we refinanced our credit facilities with the Credit Agreement. The carrying value of our outstanding term loan as of June 30, 2018 was $503.7 million compared to its fair value of $501.8 million. The carrying value of our outstanding term loan as of December 31, 2017 was $151.9 million compared to its fair value of $149.4 million. The carrying value of our outstanding Term Loan B as of December 31, 2017 was $280.0 million compared to its fair value of $283.5 million. Our estimates of fair value are based on a discounted cash flow model and indicative quote using unobservable inputs, primarily, our risk-adjusted credit spread, which represents a Level 3 measurement. As of June 30, 2018, we had no amounts outstanding on our revolving credit facility. The carrying value of the amount outstanding on our revolving credit facilities as of December 31, 2017 was $5.0 million compared to the fair value $4.9 million. Our estimates of fair value are based on a discounted cash flow model using unobservable inputs, primarily, our risk-adjusted credit spread, which represents a Level 3 measurement. In March 2018, we entered into interest rate swap agreements with notional values of $325.0 million, at inception, which reduces $12.5 million annually until the swaps mature on March 6, 2024. The interest rate swap agreements are designated as cash flow hedges and are measured at fair value based on inputs other than quoted market prices that are observable, which represents a Level 2 measurement. See Note J - “Long-Term Debt” and Note L - “Derivative Financial Instruments” for further information. The carrying value of our outstanding subordinated promissory notes issued in connection with acquisitions (“Seller Notes”) as of June 30, 2018 and December 31, 2017 was $4.1 million and $5.9 million, respectively. We believe that the carrying value of the Seller Notes approximates their fair values based on a discounted cash flow model using unobservable inputs, primarily, our credit spread for subordinated debt, which represents a Level 3 measurement.

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.