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Fair Value Measurements - Narrative (Details) - USD ($) | Sep. 30, 2017 | Dec. 31, 2016 | Oct. 04, 2016 | Sep. 30, 2016
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Predecessor | Fair Value Measurements Level 2 | 8.125% Senior Notes due 2022 | Senior Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Long-term debt, fixed interest rate |  |  |  | 8.125%
Predecessor | Fair Value Measurements Level 2 | 7.5% Senior Notes due 2023 | Senior Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Long-term debt, fixed interest rate |  |  |  | 7.50%
Successor | Convertible Notes | Convertible Debt |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Long-term debt, fixed interest rate | 0.00% |  |  |
Face amount of debt instrument |  |  | $ 281,800,000 |
Successor | New Building Note | Secured Notes |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Face amount of debt instrument | $ 35,000,000.0 |  | $ 35,000,000.0 |
Successor | Fair Value, Measurements, Recurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Fair value of investments | 4,918,000 | $ 7,541,000 |  |
Successor | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Fair value of investments | 4,918,000 | 7,541,000 |  |
Successor | Fair Value, Measurements, Recurring | Fair Value Measurements Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Fair value of investments | 0 | 0 |  |
Successor | Other current assets | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Fair value of investments | $ 4,900,000 | 2,800,000 |  |
Successor | Other assets | Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring Basis |  |  |  |
Fair value of investments |  | $ 4,800,000 |  |

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