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Derivative Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Outstanding commodity derivatives | As of December 31, 2016, the Company had the following outstanding commodity derivatives instruments:
|  |  |  |  |  |  | Collars |  |  |  |
|  |  |  |  |  |  | Floor |  | Ceiling |  | Swaps |  | Basis Swaps
Type of Contract |  | Volume |  | Contract Period |  | Range |  | Weighted-Average |  | Range |  | Weighted- Average |  | Weighted- Average |  | Weighted- Average
Natural gas |  | 35.5 |  | Bcf |  | Jan. 2017 - Dec. 2017 |  |  |  |  |  |  |  |  |  |  |  | $ | 3.12 |  |  |
Natural gas |  | 16.2 |  | Bcf |  | Feb. 2017 - Dec. 2017 |  |  |  |  |  |  |  |  |  | $ | 3.46 |  |  |
Natural gas |  | 35.5 |  | Bcf |  | Jan. 2017 - Dec. 2017 |  | $— |  | $ | 3.09 |  |  | $3.42-$3.45 |  | $ | 3.43 |  |  |  |  |  |  |
Natural gas |  | 21.3 |  | Bcf |  | Jan. 2018 - Dec. 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 0.42 |
Crude oil |  | 1.8 |  | Mmbbl |  | Jan. 2017 - Dec. 2017 |  | $— |  | $ | 50.00 |  |  | $56.25-$56.50 |  | $ | 56.39 |  |  |  |  |  |
Effect of Derivative Instruments on the Consolidated Balance Sheet | Effect of Derivative Instruments on the Consolidated Balance Sheet
|  |  |  | Fair Values of Derivative Instruments
|  |  |  | Derivative Assets |  | Derivative Liabilities
|  |  |  | December 31, |  | December 31,
(In thousands) |  | Balance Sheet Location |  | 2016 |  | 2015 |  | 2016 |  | 2015
Commodity contracts |  | Other assets (non-current) |  | $ | 2,991 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commodity contracts |  | Derivative instruments (current) |  | — |  |  | — |  |  | 40,259 |  |  | — |
|  |  |  | $ | 2,991 |  |  | $ | — |  |  | $ | 40,259 |  |  | $ | — |
Schedule of offsetting of derivative liabilities in the condensed consolidated balance sheet | Offsetting of Derivative Assets and Liabilities in the Consolidated Balance Sheet
|  | December 31,
(In thousands) |  | 2016 |  | 2015
Derivative assets |  |  |  |  |  |
Gross amounts of recognized assets |  | $ | 2,991 |  |  | $ | — |
Gross amounts offset in the statement of financial position |  | — |  |  | — |
Net amounts of assets presented in the statement of financial position |  | 2,991 |  |  | — |
Gross amounts of financial instruments not offset in the statement of financial position |  | — |  |  | — |
Net amount |  | $ | 2,991 |  |  | $ | — |
Derivative liabilities |  |  |  |
Gross amounts of recognized liabilities |  | $ | 40,259 |  |  | $ | — |
Gross amounts offset in the statement of financial position |  | — |  |  | — |
Net amounts of liabilities presented in the statement of financial position |  | 40,259 |  |  | — |
Gross amounts of financial instruments not offset in the statement of financial position |  | 757 |  |  | — |
Net amount |  | $ | 41,016 |  |  | $ | — |
Schedule of offsetting of derivative assets in the condensed consolidated balance sheet | Offsetting of Derivative Assets and Liabilities in the Consolidated Balance Sheet
|  | December 31,
(In thousands) |  | 2016 |  | 2015
Derivative assets |  |  |  |  |  |
Gross amounts of recognized assets |  | $ | 2,991 |  |  | $ | — |
Gross amounts offset in the statement of financial position |  | — |  |  | — |
Net amounts of assets presented in the statement of financial position |  | 2,991 |  |  | — |
Gross amounts of financial instruments not offset in the statement of financial position |  | — |  |  | — |
Net amount |  | $ | 2,991 |  |  | $ | — |
Derivative liabilities |  |  |  |
Gross amounts of recognized liabilities |  | $ | 40,259 |  |  | $ | — |
Gross amounts offset in the statement of financial position |  | — |  |  | — |
Net amounts of liabilities presented in the statement of financial position |  | 40,259 |  |  | — |
Gross amounts of financial instruments not offset in the statement of financial position |  | 757 |  |  | — |
Net amount |  | $ | 41,016 |  |  | $ | — |
Effect of Derivative Instruments on Accumulated Other Comprehensive Income (Loss) | The effective portion of gain (loss) recognized in accumulated other comprehensive income (loss) on derivatives is as follows:
| Year Ended December 31,
(In thousands) | 2016 |  | 2015 |  | 2014
Commodity contracts | $ | — |  |  | $ | — |  |  | $ | (133,310 | )
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) | The effective portion of gain (loss) reclassified from accumulated other comprehensive income (loss) into income is as follows:
| Year Ended December 31,
(In thousands) | 2016 |  | 2015 |  | 2014(1)
Natural gas revenues | $ | — |  |  | $ | — |  |  | $ | (143,577 | )
Crude oil and condensate revenues | — |  |  | — |  |  | (626 | )
| $ | — |  |  | $ | — |  |  | $ | (144,203 | )
(1) The Company ceased hedge accounting effective April 1, 2014. As a result, a loss of approximately $73.4 million related to amounts previously frozen in accumulated other comprehensive income (loss) was reclassified into income during 2014.
Effect of Derivative Instruments on the Consolidated Statement of Operations | Effect of Derivative Instruments on the Consolidated Statement of Operations
|  | Year Ended December 31,
(In thousands) |  | 2016 |  | 2015 |  | 2014
Derivatives Designated as Hedges |  |  |  |  |  |
Cash received (paid) on settlement of derivative instruments |  |  |  |  |  |
Natural gas |  | $ | — |  |  | $ | — |  |  | $ | (70,557 | )
Crude oil and condensate |  | — |  |  | — |  |  | (218 | )
|  | $ | — |  |  | $ | — |  |  | $ | (70,775 | )
Derivatives Not Designated as Hedges |  |  |  |  |  |
Cash received (paid) on settlement of derivative instruments |  |  |  |  |  |
Natural gas(1) |  | $ | — |  |  | $ | — |  |  | $ | (73,020 | )
Crude oil and condensate(1) |  | — |  |  | — |  |  | (408 | )
Gain (loss) on derivative instruments |  | (1,682 | ) |  | 194,289 |  |  | 81,716 |
Non-cash gain (loss) on derivative instruments |  |  |  |  |  |
Gain (loss) on derivative instruments |  | (37,268 | ) |  | (137,603 | ) |  | 137,603 |
|  | $ | (38,950 | ) |  | $ | 56,686 |  |  | $ | 145,891 |
|  | $ | (38,950 | ) |  | $ | 56,686 |  |  | $ | 75,116 |
(1) Relates entirely to the reclassification from accumulated other comprehensive income (loss) of previously frozen losses associated with derivatives that were de-designated as cash flow hedges on April 1, 2014.

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) reclassified from accumulated other comprehensive income (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References No definition available. + Details
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- Definition Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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