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Fair Value Measurements | 9 Months Ended
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Sep. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements The Company records its financial instruments, principally derivative instruments, at fair value in its Condensed Consolidated Balance Sheets. The Company estimates the fair value using quoted market prices, where available. If quoted market prices are not available, fair value is based upon models that use market-based parameters as inputs, including forward curves, discount rates, volatilities and nonperformance risk. Nonperformance risk considers the effect of the Company’s credit standing on the fair value of liabilities and the effect of the counterparty’s credit standing on the fair value of assets. The Company estimates nonperformance risk by analyzing publicly available market information, including a comparison of the yield on debt instruments with credit ratings similar to the Company’s or counterparty’s credit rating and the yield of a risk-free instrument and credit default swaps rates where available. The Company has categorized its assets and liabilities recorded at fair value into a three-level fair value hierarchy, based on the priority of the inputs to the valuation technique. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets and liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). Assets and liabilities in Level 2 primarily include the Company’s swap, collar and option agreements. Exchange traded commodity swaps are included in Level 1. The fair value of the commodity swaps included in Level 2 is based on standard industry income approach models that use significant observable inputs, including but not limited to NYMEX natural gas forward curves, LIBOR-based discount rates, basis forward curves and natural gas liquids forward curves. The Company’s collars, options and swaptions are valued using standard industry income approach option models. The significant observable inputs utilized by the option pricing models include NYMEX forward curves, natural gas volatilities and LIBOR-based discount rates. The NYMEX natural gas forward curves, LIBOR-based discount rates, natural gas volatilities, basis forward curves and NGLs forward curves are validated to external sources at least monthly. The following assets and liabilities were measured at fair value on a recurring basis during the applicable period:
|  |  |  | Fair value measurements at reporting date using
Description |  | As of September 30, 2018 |  | Quoted prices in active markets for identical assets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
|  | (Thousands)
Assets |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments, at fair value |  | $ | 315,564 |  |  | $ | 7,661 |  |  | $ | 307,903 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |
Derivative instruments, at fair value |  | $ | 183,677 |  |  | $ | 12,058 |  |  | $ | 171,619 |  |  | $ | — |
|  |  |  | Fair value measurements at reporting date using
Description |  | As of December 31, 2017 |  | Quoted prices in active markets for identical assets (Level 1) |  | Significant other observable inputs (Level 2) |  | Significant unobservable inputs (Level 3)
|  | (Thousands)
Assets |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments, at fair value |  | $ | 241,952 |  |  | $ | — |  |  | $ | 241,952 |  |  | $ | — |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |
Derivative instruments, at fair value |  | $ | 139,089 |  |  | $ | — |  |  | $ | 139,089 |  |  | $ | — |
The carrying values of cash equivalents, accounts receivable and accounts payable approximate fair value due to the short-term maturity of the instruments. The carrying values of borrowings under the Company's various credit facilities approximate fair value as the interest rates are based on prevailing market rates. The Company also has an immaterial investment in a fund that invests in companies developing technology and operating solutions for exploration and production companies for which it recognized a cumulative effect of accounting change in the first quarter 2018. The investment is valued using the net asset value as a practical expedient as provided in the financial statements received from fund managers. The Company estimates the fair value of its Senior Notes using its established fair value methodology. Because not all of the Company’s Senior Notes are actively traded, the fair value of the Company's Senior Notes are a Level 2 fair value measurement. Fair value for the Company's non-traded Senior Notes are estimated using a standard industry income approach model that utilizes a discount rate based on market rates for debt with similar remaining time to maturity and credit risk. The estimated fair value of Senior Notes (including EQM’s Senior Notes) on the Condensed Consolidated Balance Sheets was approximately $8.1 billion at September 30, 2018 and $5.7 billion at December 31, 2017. The Company recognizes transfers between Levels as of the actual date of the event or change in circumstances that caused the transfer. There were no transfers between Levels 1, 2 and 3 during the periods presented. For information on the fair values of assets related to the impairments of proved and unproved oil and gas properties and of other long-lived assets, see Note Q and Note 1 in EQT's Annual Report on Form 10-K for the year ended December 31, 2017. For information on the assets acquired in the Rice Merger and the assets acquired in other acquisition transactions, see Notes A and P.

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