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Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2017
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured on Recurring Basis | The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis by the fair value hierarchy (in thousands): September 30, 2017
| Fair Value Measurements |  | Netting(1) |  | Assets/Liabilities at Fair Value
| Level 1 |  | Level 2 |  | Level 3
Assets |  |  |  |  |  |  |  |  |
Commodity derivative contracts | $ | — |  |  | $ | 9,641 |  |  | $ | — |  |  | $ | (1,023 | ) |  | $ | 8,618 |
Investments | 4,918 |  |  | — |  |  | — |  |  | — |  |  | 4,918 |
| $ | 4,918 |  |  | $ | 9,641 |  |  | $ | — |  |  | $ | (1,023 | ) |  | $ | 13,536 |
Liabilities |  |  |  |  |  |  |  |  |
Commodity derivative contracts | $ | — |  |  | $ | 1,031 |  |  | $ | — |  |  | $ | (1,023 | ) |  | $ | 8 |
| $ | — |  |  | $ | 1,031 |  |  | $ | — |  |  | $ | (1,023 | ) |  | $ | 8 |
December 31, 2016
| Fair Value Measurements |  | Netting(1) |  | Assets/Liabilities at Fair Value
| Level 1 |  | Level 2 |  | Level 3
Assets |  |  |  |  |  |  |  |  |
Investments | $ | 7,541 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7,541 |
| $ | 7,541 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 7,541 |
Liabilities |  |  |  |  |  |  |  |  |
Commodity derivative contracts | $ | — |  |  | $ | 29,714 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,714 |
| $ | — |  |  | $ | 29,714 |  |  | $ | — |  |  | $ | — |  |  | $ | 29,714 |
____________________ (1)Represents the effect of netting assets and liabilities for counterparties with which the right of offset exists.
Fair Value, Reconciliation of Level 3 Fair Value Measurements - Liabilities | The table below sets forth a reconciliation of the Predecessor Company’s Level 3 fair value measurements for debt holder conversion features (in thousands):
|  | Nine Months Ended September 30, 2016
Beginning balance |  | $ | 29,355 |
Gain on derivative holder conversion feature |  | (880 | )
Conversions |  | (21,194 | )
Write off of derivative holder conversion feature to reorganization items |  | (7,281 | )
Ending balance |  | $ | — |
Long-Term Debt Carrying Amount and Fair Value Table | The estimated fair values and carrying values of the Company’s long-term debt are as follows (in thousands):
| September 30, 2017 |  | December 31, 2016
| Fair Value |  | Carrying Value |  | Fair Value |  | Carrying Value
Convertible Notes | $ | — |  |  | $ | — |  |  | $ | 334,800 |  |  | $ | 268,780 |
Building Note | $ | 41,638 |  |  | $ | 37,601 |  |  | $ | 40,608 |  |  | $ | 36,528 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=75026489&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258 + Details
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