Income Taxes (Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Deferred tax asset | ||
| Federal net operating loss carryforward | $ 107,935 | $ 86,629 |
| Statutory depletion carryforward | 8,843 | 8,876 |
| Alternative minimum tax credit carryforward | 208 | 208 |
| Asset retirement obligations | 630 | 1,003 |
| Other | 8,241 | 6,621 |
| Deferred tax asset before valuation allowance | 125,857 | 103,337 |
| Deferred tax liability | ||
| Oil and natural gas properties | 6,488 | 54,723 |
| Other | 10,526 | 10,140 |
| Total deferred tax liability | 17,014 | 64,863 |
| Net deferred tax asset before valuation allowance | 108,843 | 38,474 |
| Less: Valuation allowance | $ (108,843) | |
| Total deferred tax asset | $ 38,474 |
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- Definition Deferred Tax Assets, Statutory Depletion Carryforward No definition available.
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- Definition Deferred TaxAssets Liabilities Net Before Valuation Allowance No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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