| **Consolidated Statements of Cash Flows - USD ($) $ in Thousands**                              | 3 Months Ended |
|-------------------------------------------------------------------------------------------------|----------------|
||
| **Statement of Cash Flows [Abstract]**                                                          |           |   |
| Net income (loss)                                                                               | $ 414,132      | $ (31,960) |
| **Adjustments to net income (loss) to reconcile to net cash provided by operating activities:** |           |   |
| Net change in fair value of unsettled commodity derivatives                                     | (230,386)      | 406,461 |
| Depreciation, depletion and amortization                                                        | 207,187        | 151,055 |
| Impairment of properties and equipment                                                          | 1,373          | 943 |
| Accretion of asset retirement obligations                                                       | 3,714          | 2,987 |
| Non-cash stock-based compensation                                                               | 6,564          | 5,474 |
| Loss (gain) on sale of properties and equipment                                                 | 155            | (125) |
| Amortization of debt discount and issuance costs                                                | 1,361          | 1,357 |
| Deferred income taxes                                                                           | 113,675        | 3,600 |
| Other                                                                                           | 258            | (1,030) |
| Changes in assets and liabilities                                                               | 70,445         | (49,839) |
| Net cash from operating activities                                                              | 588,323        | 489,048 |
| **Cash flows from investing activities:**                                                       |           |   |
| Capital expenditures for development of crude oil and natural gas properties                    | (362,251)      | (187,021) |
| Capital expenditures for midstream assets                                                       | (3,574)        | 0 |
| Capital expenditures for other properties and equipment                                         | (6,651)        | (67) |
| Proceeds from sale of properties and equipment                                                  | 37             | 89 |
| Proceeds from Divestiture of Businesses                                                         | 0              | 465 |
| Net cash from investing activities                                                              | (372,439)      | (236,534) |
| **Cash flows from financing activities:**                                                       |           |   |
| Proceeds from revolving credit facility                                                         | 496,000        | 100,500 |
| Repayment of revolving credit facility                                                          | (514,000)      | (100,500) |
| Payments of Debt Issuance Costs                                                                 | 0              | 30 |
| Purchase of treasury shares for employee stock-based compensation tax withholding obligations   | (19,243)       | (9,203) |
| Purchase of treasury shares under stock repurchase program                                      | (129,944)      | (80,853) |
| Dividends paid                                                                                  | (37,179)       | (24,681) |
| Finance Lease, Principal Payments                                                               | (569)          | (419) |
| Net cash from financing activities                                                              | (204,935)      | (115,186) |
| Net change in cash, cash equivalents, and restricted cash                                       | 10,949         | 137,328 |
| Cash, cash equivalents and restricted cash, beginning of period                                 | 6,494          | 33,829 |
| Cash, cash equivalents and restricted cash, end of period                                       | 17,443         | 171,157 |
| Escrow Deposit Disbursements Related to Property Acquisition                                    | $ 0            | $ (50,000) |
| Treasury Stock, Common, Shares                                                                  | 88,328         |   |

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Payments To Explore And Develop Oil And Gas Properties, Midstream Assets
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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.
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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
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Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability.
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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.
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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.
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Amount of escrow deposit disbursements related to property acquisition in noncash investing or financing transactions.
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Amount of cash outflow for principal payment on finance lease.
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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.
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The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.
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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.
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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.
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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.
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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.
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Other cash or noncash adjustments to reconcile net income to cash provided by (used in) operating activities that are not separately disclosed in the statement of cash flows (for example, cash received or cash paid during the current period for miscellaneous operating activities, net change during the reporting period in other assets or other liabilities).
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The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use.
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The cash outflow to reacquire common stock during the period.
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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.
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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.
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Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.
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The cash outflow for exploration and development of oil and gas properties. It includes cash payments related to development of oil and gas wells drilled at previously untested geologic structures (to determine the presence of oil or gas) and wells drilled at sites where the presence of oil or gas has already been established (to extract the oil or gas).
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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.
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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.
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The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.
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Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.
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Amount of noncash expense for share-based payment arrangement.
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Number of previously issued common shares repurchased by the issuing entity and held in treasury.
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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.
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