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SEGMENT INFORMATION - Schedule of Industry Segment Results (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2025
Segment Reporting Information [Line Items] |  |  |
(Loss) Gain on Commodity Derivative Instruments | $ 3,981 | $ (528,220) |
Other Revenue and Operating Income | 47,942 | 47,964 |
Total Revenue and Other Operating Income | 786,654 | 82,388 |
Lease Operating Expense | 21,770 | 23,333 |
Production, Ad Valorem and Other Fees | 8,789 | 7,273 |
Depreciation, Depletion and Amortization | 134,613 | 127,062 |
Interest Expense | 40,470 | 41,612 |
Other Segment Items | 50,206 | 60,748 |
Total Costs and Expenses | 358,249 | 355,187 |
Income (Loss) Before Income Tax | 428,405 | (272,799) |
Segment Assets | 9,131,183 | 9,046,709 | $ 9,094,446
Capital Expenditures | 169,906 | 131,465 |
Investments in unconsolidated equity affiliates | 5,810 | 18,323 |
Natural Gas, NGLs and Oil Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 722,044 | 551,094 |
Natural Gas, NGLs and Oil Revenue | NRG Business Marketing LLC |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 156,014 |  |
Natural Gas, NGLs and Oil Revenue | DTE Energy Trading, Inc. |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 83,346 |  |
Natural Gas, NGLs and Oil Revenue | Citadel Energy Marketing, LLC |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues |  | 64,800 |
Purchased Gas Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 12,687 | 11,550 |
Transportation, Gathering and Compression |  |  |
Segment Reporting Information [Line Items] |  |  |
Transportation, Gathering and Compression | 102,401 | 95,159 |
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 751,100 | 579,482 |
Operating Segments | Shale |  |  |
Segment Reporting Information [Line Items] |  |  |
(Loss) Gain on Commodity Derivative Instruments | (208,340) | (102,700) |
Other Revenue and Operating Income | 16,369 | 16,838 |
Total Revenue and Other Operating Income | 470,929 | 421,693 |
Lease Operating Expense | 15,542 | 17,219 |
Production, Ad Valorem and Other Fees | 6,564 | 5,500 |
Depreciation, Depletion and Amortization | 112,964 | 106,360 |
Interest Expense | 0 | 0 |
Other Segment Items | 0 | 0 |
Total Costs and Expenses | 221,846 | 207,129 |
Income (Loss) Before Income Tax | 249,083 | 214,564 |
Segment Assets | 7,268,317 | 7,190,127 |
Capital Expenditures | 163,420 | 127,679 |
Operating Segments | Shale | Natural Gas, NGLs and Oil Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 662,900 | 507,555 |
Operating Segments | Shale | Purchased Gas Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 |
Operating Segments | Shale | Transportation, Gathering and Compression |  |  |
Segment Reporting Information [Line Items] |  |  |
Transportation, Gathering and Compression | 86,776 | 78,050 |
Operating Segments | Coalbed Methane |  |  |
Segment Reporting Information [Line Items] |  |  |
(Loss) Gain on Commodity Derivative Instruments | (13,197) | (6,953) |
Other Revenue and Operating Income | 0 | 0 |
Total Revenue and Other Operating Income | 45,564 | 36,325 |
Lease Operating Expense | 6,026 | 5,969 |
Production, Ad Valorem and Other Fees | 2,212 | 1,766 |
Depreciation, Depletion and Amortization | 14,416 | 13,812 |
Interest Expense | 0 | 0 |
Other Segment Items | 0 | 0 |
Total Costs and Expenses | 38,649 | 38,330 |
Income (Loss) Before Income Tax | 6,915 | (2,005) |
Segment Assets | 894,991 | 909,369 |
Capital Expenditures | 5,400 | 2,743 |
Operating Segments | Coalbed Methane | Natural Gas, NGLs and Oil Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 58,761 | 43,278 |
Operating Segments | Coalbed Methane | Purchased Gas Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 0 | 0 |
Operating Segments | Coalbed Methane | Transportation, Gathering and Compression |  |  |
Segment Reporting Information [Line Items] |  |  |
Transportation, Gathering and Compression | 15,995 | 16,783 |
Other |  |  |
Segment Reporting Information [Line Items] |  |  |
(Loss) Gain on Commodity Derivative Instruments | 225,518 | (418,567) |
Other Revenue and Operating Income | 31,573 | 31,126 |
Total Revenue and Other Operating Income | 270,161 | (375,630) |
Lease Operating Expense | 202 | 145 |
Production, Ad Valorem and Other Fees | 13 | 7 |
Depreciation, Depletion and Amortization | 7,233 | 6,890 |
Interest Expense | 40,470 | 41,612 |
Other Segment Items | 50,206 | 60,748 |
Total Costs and Expenses | 97,754 | 109,728 |
Income (Loss) Before Income Tax | 172,407 | (485,358) |
Equity in earnings (loss) of unconsolidated affiliates | 463 | 58 |
Segment Assets | 967,875 | 947,213 |
Capital Expenditures | 1,086 | 1,043 |
Other | Natural Gas, NGLs and Oil Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 383 | 261 |
Other | Purchased Gas Revenue |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenues | 12,687 | 11,550 |
Other | Transportation, Gathering and Compression |  |  |
Segment Reporting Information [Line Items] |  |  |
Transportation, Gathering and Compression | (370) | 326 |
Other | Enviromental Attributes |  |  |
Segment Reporting Information [Line Items] |  |  |
Other Revenue and Operating Income | $ 14,940 | $ 22,886 |

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