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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 Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants in the principal market or, if none exists, the most advantageous market, for the specific asset or liability at the measurement date (referred to as the "exit price"). Fair value is a market-based measurement that should be determined based upon assumptions that market participants would use in pricing an asset or liability, including consideration of nonperformance risk. The Company assesses the inputs used to measure fair value using the three-tier hierarchy promulgated under U.S. GAAP. This hierarchy indicates the extent to which inputs used in measuring fair value are observable in the market. Level 1: Inputs that reflect quoted prices for identical assets or liabilities in active markets that are observable. Level 2: Inputs other than quoted prices included in Level 1 that are observable either directly or indirectly, including quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or model-derived valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data. Level 3: Inputs that are unobservable to the extent that observable inputs are not available for the asset or liability at the measurement date and include management's judgment about assumptions that market participants would use in pricing the asset or liability. Under U.S. GAAP, entities are allowed to measure certain financial instruments and other items at fair value. The Company has not elected the fair value measurement option for any of its assets or liabilities that meet the criteria for this option. Irrespective of the fair value option previously described, U.S. GAAP requires certain financial and non-financial assets and liabilities of the Company to be measured on either a recurring basis or on a nonrecurring basis as shown in the sections that follow. Assets and Liabilities Measured at Fair Value on a Recurring Basis The fair value of cash, accounts receivable, accounts payable and accrued liabilities, to the extent the underlying liability will be settled in cash, approximates carrying values because of the short-term nature of these instruments. The Company's assessment of goodwill and other intangible assets for impairment includes an assessment using various Level 2 (EBITDA multiples and discount rate) and Level 3 (forecasted cash flows) inputs. See Note 2, "Basis of Presentation and Recently Issued Accounting Pronouncements-Goodwill and Indefinite-Lived Intangible Assets," for more information on the application of the use of fair value methodology. Cash Equivalents and Investments Cash equivalents, when held, primarily consist of money market accounts which are classified as Level 1 assets which the Company measures at fair value on a recurring basis. The Company determines the fair value of cash equivalents using a market approach based on quoted prices in active markets. The Company had no cash equivalents at December 31, 2017 or 2016. Financial Instruments The fair value of the Company's financial instruments as of December 31, 2017 and 2016 are shown in Note 17, "Financial Instruments." The Company's financial instruments are classified as Level 2 assets and liabilities and are priced using quoted market prices for similar assets or liabilities in active markets. Debt Obligations The fair value of the Company's debt is estimated based on quoted market rates as well as borrowing rates currently available for loans with similar terms and average maturities (Level 2 inputs) (in millions).
| December 31, 2017 |  | December 31, 2016
| Nominal Unpaid Principal Balance |  | Aggregate Fair Value |  | Nominal Unpaid Principal Balance |  | Aggregate Fair Value
Debt | $ | 2,174.3 |  |  | $ | 2,260.9 |  |  | $ | 2,215.3 |  |  | $ | 2,275.5 |

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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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