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v3.20.4

Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Components of the provision for income taxes |  |  |
Current Federal Tax Expense (Benefit) | $ 0 | $ 3,826 | $ 0
Current State and Local Tax Expense (Benefit) | (449) | (1,618) | (1,662)
Deferred portion of income tax (expense) benefit | 192,540 | 41,835 | (141,708)
Income tax (expense) benefit | $ 192,091 | $ 44,043 | $ (143,370)
Effective tax rate (as a percent) | 20.10% | 19.10% | 22.00%
Deferred income taxes [Abstract] |  |  |
Deferred tax liabilities, oil and gas properties | $ 83,816 | $ 224,686 |
Deferred tax liabilities, derivatives assets | 0 | 4,646 |
Deferred tax liabilities, other | 10,054 | 12,361 |
Total deferred tax liabilities | 93,870 | 241,693 |
Derivative tax assets, derivative liabilities | 36,311 | 0 |
Derivative tax assets, debt discount and deferred financing costs | 23,925 | 0 |
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Asset Retirement Obligations | 18,424 | 19,658 |
Deferred tax assets, credit carryover | 7,543 | 11,270 |
Deferred tax assets, pension | 7,183 | 5,971 |
Deferred tax assets, federal and state tax net operating loss carryovers | 3,898 | 4,172 |
Deferred tax assets, stock compensation | 2,701 | 3,503 |
Deferred tax assets, other liabilities | 7,273 | 10,803 |
Total deferred tax assets | 107,258 | 55,377 |
Deferred tax assets, valuation allowance | (13,388) | (3,070) |
Net deferred tax assets | 93,870 | 52,307 |
Total net deferred tax liabilities | 0 | 189,386 |
State and local jurisdiction [Member] |  |  |
Deferred income taxes [Abstract] |  |  |
Current state income tax payable | 853 | 1,404 |
Net operating loss carryforwards | 4,900 |  |
Internal Revenue Service (IRS) [Member] | Domestic tax authority [Member] |  |  |
Deferred income taxes [Abstract] |  |  |
Current federal income tax refundable | 0 | $ 3,885 |
Internal Revenue Service (IRS) [Member] | Domestic tax authority [Member] | Research and development tax credit carryforward [Member] |  |  |
Deferred income taxes [Abstract] |  |  |
Deferred tax assets, credit carryover | $ 7,500 |  |

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