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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2017
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The carrying values of cash and cash equivalents, accounts receivable, accounts payable and accrued payroll and contractor professional pay approximate their fair value based on their short-term nature. Long-term debt recorded in the Company’s consolidated balance sheets at December 31, 2017 was $575.2 million (net of $12.8 million of unamortized deferred loan costs, see “Note 7. Long-Term Debt”). The fair value of the term B loan was determined using Level 1 inputs (quoted prices in active markets for identical liabilities) from the fair value hierarchy. The fair value of the term B loan was $591.7 million as of December 31, 2017. Certain acquisitions included obligations to pay contingent consideration in cash if specific performance targets were met. There were no remaining contingent consideration obligations as of December 31, 2016. The following table summarizes the changes in the balance of contingent consideration for the year ended December 31, 2016 (in thousands):
Balance at beginning of year |  | $ | (20,981 | )
Additions for acquisitions |  | — |
Payments on contingent consideration |  | 21,594 |
Fair value adjustments |  | (613 | )
Balance at end of year |  | $ | — |
Certain assets and liabilities, such as goodwill and trademarks, are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment). For 2017 and 2016, no fair value adjustments were required for non-financial assets or liabilities.

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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