| Fiscal period | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
| Period End Date | 12/31/2025 | 12/31/2024 | 12/31/2023 | 12/31/2022 | 12/31/2021 | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 |
| Oil and gas sales | 2,815.59 | 2,213.85 | 2,334.66 | 4,911.09 | 3,215.03 | 1,607.71 | 2,255.43 | 2,851.08 | 2,176.29 | 1,197.22 |
| Transportation and gathering | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Brokered natural gas and marketing | 172.57 | 133.05 | 218.60 | 424.22 | 365.41 | 173.27 | 345.51 | 482.76 | 221.39 | 164.12 |
| Revenues: Other | -- | 13.46 | -- | -- | -- | -- | -- | -- | -- | -- |
| Interest and other | 5.82 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Mark-to-market on oil and gas derivatives | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| IPF | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain on formation of Great Lakes | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain (loss) on retirement of securities | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Derivative fair value (loss)income | 121.54 | 56.73 | 821.15 | (1,188.51) | (650.22) | 187.71 | 226.68 | (51.19) | 213.35 | (261.39) |
| Gain on the sale of assets | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Total Revenues | 3,115.52 | 2,417.08 | 3,374.42 | 4,146.80 | 2,930.22 | 1,968.70 | 2,827.62 | 3,282.65 | 2,611.03 | 1,099.94 |
| Brokered natural gas and marketing | 185.55 | 140.55 | 202.88 | 427.05 | 367.29 | 188.32 | 359.89 | 496.05 | 220.31 | 168.58 |
| Exploration | 30.18 | 26.84 | 26.53 | 26.77 | 23.56 | 32.65 | 36.68 | 34.12 | 53.66 | 32.33 |
| Direct operating | 102.17 | 95.32 | 96.09 | 84.29 | 75.29 | 92.16 | 136.28 | 139.53 | 134.25 | 97.39 |
| Transportation, gathering and compression | 1,223.32 | 1,177.93 | 1,113.94 | 1,242.94 | 1,174.47 | 1,088.49 | 1,199.30 | 1,117.82 | 761.18 | 565.21 |
| Depletion, depreciation and amortization | 370.46 | 358.36 | 350.17 | 353.42 | 364.56 | 394.33 | 548.84 | 635.47 | 624.99 | 524.10 |
| Impairment of goodwill | -- | -- | -- | -- | -- | 0.00 | 0.00 | 1,641.20 | -- | -- |
| General and administrative | 178.32 | 172.14 | 164.74 | 168.09 | 169.77 | 159.42 | 181.11 | 209.81 | 233.41 | 184.77 |
| Production and ad valorem taxes | 32.82 | 21.63 | 23.73 | 35.37 | 29.32 | 24.62 | 37.97 | 46.15 | 42.88 | 25.44 |
| Impairment of proved properties | -- | -- | -- | 0.00 | 0.00 | (78.96) | -- | -- | (63.68) | (43.04) |
| Deferred compensation plan | (1.42) | (9.59) | (26.59) | (61.88) | (68.35) | (12.54) | 15.47 | 18.63 | 50.92 | (19.15) |
| IPF | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Termination costs | (25.75) | (37.21) | -- | (70.34) | (21.66) | (547.41) | (9.51) | 0.37 | (3.77) | 0.52 |
| Termination costs - non-cash stock compensation | -- | -- | (99.94) | -- | -- | -- | -- | -- | -- | -- |
| Interest expense | 104.90 | 118.76 | 124.00 | 165.15 | 227.34 | 192.67 | 194.29 | 210.21 | 195.68 | 168.21 |
| Provision for impairment | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Abandonment and impairment of unproved properties | 28.94 | 8.42 | 46.36 | 28.61 | 7.21 | 19.33 | 1,235.34 | 514.99 | 269.73 | 30.08 |
| Impairment of proved properties and other assets | -- | -- | -- | -- | -- | -- | 1,095.63 | 22.61 | -- | -- |
| Memorial merger expenses | -- | -- | -- | -- | -- | -- | -- | -- | 0.00 | (37.23) |
| Loss (Gain) on sale of assets | -- | -- | 0.45 | 0.41 | 0.70 | 110.79 | (30.26) | (10.67) | 23.72 | (7.07) |
| Loss on early extinguishment of debt | 0.00 | -- | 0.44 | (69.49) | (0.10) | 14.07 | -- | -- | -- | -- |
| Debt conversion expense | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Gain (Loss) on early extinguishment of debt | -- | 0.26 | -- | -- | -- | -- | 5.42 | -- | 0.00 | 0.00 |
| Income Before Income Taxes | 831.69 | 250.61 | 1,100.34 | 1,413.83 | 402.04 | (737.33) | (2,216.59) | (1,776.97) | 82.12 | (802.14) |
| Current: U.S. Federal | -- | 3.33 | -- | 0.00 | 0.00 | -- | -- | -- | -- | -- |
| Deferred: U.S. Federal | -- | (7.31) | 230.56 | 245.84 | 6.30 | (24.49) | (434.59) | (25.32) | (302.51) | (266.11) |
| Income tax provision (benefit): Current | 9.39 | 8.17 | 1.55 | 14.69 | 7.98 | (0.52) | 6.15 | -- | 0.02 | 0.10 |
| Income tax provision (benefit): Deferred | 164.27 | (23.90) | 227.65 | 215.77 | (17.73) | (25.03) | (506.44) | (30.49) | (251.04) | (280.85) |
| Current: U.S. state and local | -- | 4.84 | 1.55 | 14.69 | 7.98 | (0.16) | 6.15 | -- | 0.02 | 0.10 |
| Deferred: U.S. state and local | -- | (16.59) | (2.91) | (30.07) | (24.02) | (0.54) | (71.85) | (5.17) | 51.46 | (14.74) |
| Income from continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Discontinued Operations, Net of Taxes | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Income Before Extraordinary Income & Accounting Change | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary item: Gain on retirement of securities, net | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative Effect of Change in Accounting Principle, net of taxes | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Consolidated Net Income (Loss) | -- | 266.34 | 871.14 | 1,183.37 | 411.78 | (711.78) | (1,716.30) | (1,746.48) | 333.15 | (521.39) |
| Net Income (Loss) Attributable to Parent Company | 658.02 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| PREFERRED DIVIDENDS | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Participating basic earnings | 1.30 | 1.30 | 14.97 | 28.58 | 10.80 | -- | 0.25 | -- | 3.75 | 0.22 |
| Reallocation of participating earnings | -- | -- | -- | -- | -- | -- | -- | -- | (0.01) | -- |
| Net Income (Loss) Available to Common Shareholders | 656.73 | 265.04 | 856.17 | 1,154.79 | 400.98 | (711.78) | (1,716.55) | (1,746.48) | 329.40 | (521.61) |
| EPS (Basic) : Continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (Basic) : Discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative effect of change in accounting principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (BASIC) | 2.76 | 1.10 | 3.61 | 4.79 | 1.65 | (2.95) | (6.92) | (7.10) | 1.34 | (2.75) |
| EPS (Diluted) : Continuing operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| EPS (Diluted) : Discontinued operations | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Cumulative effect of change in accounting principle | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Extraordinary Item | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| NET EARNINGS PER SHARE (DILUTED) | 2.74 | 1.09 | 3.57 | 4.69 | 1.61 | (2.95) | (6.92) | (7.10) | 1.34 | (2.75) |
| Weighted Average Shares Outstanding (Basic) | 237.94 | 240.69 | 236.99 | 240.86 | 242.86 | 241.37 | 247.97 | 246.17 | 245.09 | 189.87 |
| Weighted Average Shares Outstanding (Diluted) | 239.79 | 242.75 | 239.84 | 246.38 | 249.31 | 241.37 | 247.97 | 246.17 | 245.46 | 189.87 |
| Dividends per common share | 0.36 | 0.32 | 0.32 | -- | -- | 0.00 | 0.08 | -- | -- | -- |