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Fair Value Measurements
9 Months Ended
Sep. 30, 2017
Fair Value Disclosures [Abstract]  
Fair Value Measurements
Fair Value Measurements
The three-tier value hierarchy the Company utilizes, which prioritizes the inputs used in the valuation methodologies, is:
Level 1—Valuations based on quoted prices for identical assets and liabilities in active markets.
Level 2—Valuations based on observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets and liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data.
Level 3—Valuations based on unobservable inputs reflecting our own assumptions, consistent with reasonably available assumptions made by other market participants.
The fair value of cash, accounts receivable, cash collateralized letters of credit and accounts payable approximate their carrying values. The fair value of cash equivalents are determined using the fair value hierarchy described above. Cash equivalents consisting of money market funds are valued based on quoted prices in active markets and as a result are classified as Level 1.
The Company’s pension plan asset portfolio as of September 30, 2017 and December 31, 2016 is primarily invested in fixed income securities, which generally fall within Level 2 of the fair value hierarchy. Fixed income securities are valued based on evaluated prices provided to the trustee by independent pricing services. Such prices may be determined by various factors which include, but are not limited to, market quotations, yields, maturities, call features, ratings, institutional size trading in similar groups of securities and developments related to specific securities.
As of September 30, 2017, the fair value of the Company's Second Lien Notes (including the bifurcated embedded conversion option) approximates its carrying value of $156,852. The fair value of the Second Lien Notes, which falls within Level 3 of the fair value hierarchy, was determined based on market information and a review of prices and terms available for similar debt instruments that do not contain a conversion feature, as well as other factors related to the callable nature of the Second Lien Notes. Given the nature and the variable interest rates, the fair value of borrowings under the New ABL Facility and the French subsidiary's foreign line of credit approximated their carrying value as of September 30, 2017.
The following valuation assumptions were used in determining the fair value of the Second Lien Notes as of September 30, 2017:
Risk-free interest rate
1.70
%
Credit spreads
13.96
%
PIK premium spread
2.00
%
Volatility
50.00
%

Fair Value Measurements of Embedded Conversion Option
The fair value of the derivative liability for the embedded conversion option of the Second Lien Notes was estimated to be $61,608 as of September 30, 2017. The estimated fair value of the derivative liability for the embedded conversion option of the Second Lien Notes, which falls within Level 3 of the fair value hierarchy, is measured on a recurring basis using a binomial lattice model using the Company's historical volatility over the term corresponding to the remaining contractual term of the Second Lien Notes and observed spreads of similar debt instruments that do not include a conversion feature. The change in the fair value of the Level 3 derivative liability between the Effective Date and September 30, 2017 was not significant.