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Derivative Instruments | 9 Months Ended
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Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivative Instruments | Derivative Instruments The Company enters into natural gas swap contracts to hedge the exposure to variability in expected future cash flows associated with the fluctuations in the price of natural gas related to the Company’s forecasted sales. As of September 30, 2017 (Successor), the Company had natural gas swap contracts outstanding with notional amounts totaling 1,980 million British thermal units maturing in the fourth quarter of 2017 and 2,400 million maturing in the fourth quarter of 2018. As of December 31, 2016 (Successor), the Company had natural gas swap contracts outstanding with notional amounts totaling 7,920 million British thermal units maturing in the fourth quarter of 2017. The Company’s natural gas swap contracts economically hedge certain risk but are not designated as hedges for financial reporting purposes. All changes in the fair value of these derivative instruments are recorded as other revenues in the Condensed Statements of Operations. The Company records all derivative instruments at fair value and had an asset of $0.3 million related to natural gas swap contracts outstanding as of September 30, 2017 (Successor), of which $0.25 million was included in prepaid expenses and $0.05 million was included in other long-term assets, and $3.8 million as of December 31, 2016 (Successor) included in other current liabilities in the accompanying Condensed Balance Sheets.

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