v3.26.3
SEGMENT INFORMATION - Schedule of Industry Segment Results (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]          
(Loss) Gain on Commodity Derivative Instruments $ 160,563 $ 131,695 $ 340,880 $ 24,596  
Other Revenue and Operating Income 42,499 42,129 130,699 135,956  
Total Revenue and Other Operating Income 580,004 583,840 1,985,142 1,628,650  
Lease Operating Expense 23,839 27,127 66,871 76,715  
Production, Ad Valorem and Other Fees 6,669 7,725 22,004 24,666  
Depreciation, Depletion and Amortization 134,645 149,323 405,490 428,979  
Interest Expense 39,588 42,964 119,081 128,616  
Other Segment Items 61,444 (6,044) 186,906 101,974  
Total Costs and Expenses 360,817 318,148 1,100,609 1,050,115  
Income (Loss) Before Income Tax 219,187 265,692 884,533 578,535  
Segment Assets 9,160,014 8,904,118 9,160,014 8,904,118 $ 9,094,446
Capital Expenditures 139,152 75,544 451,058 320,574  
Investments in unconsolidated equity affiliates 9,989 17,881 9,989 17,881  
Natural Gas, NGLs and Oil Revenue          
Segment Reporting [Line Items]          
Revenues 372,516 400,990 1,483,994 1,437,113  
Natural Gas, NGLs and Oil Revenue | DTE Energy Trading, Inc.          
Segment Reporting [Line Items]          
Revenues   49,542 151,429 154,654  
Natural Gas, NGLs and Oil Revenue | NRG Business Marketing LLC          
Segment Reporting [Line Items]          
Revenues 57,654 47,915 271,215 151,213  
Natural Gas, NGLs and Oil Revenue | Citadel Energy Marketing, LLC          
Segment Reporting [Line Items]          
Revenues   43,010   167,758  
Purchased Gas Revenue          
Segment Reporting [Line Items]          
Revenues 4,426 9,026 29,569 30,985  
Transportation, Gathering and Compression          
Segment Reporting [Line Items]          
Transportation, Gathering and Compression 94,632 97,053 300,257 289,165  
Operating Segments          
Segment Reporting [Line Items]          
Revenues 391,737 427,431 1,560,009 1,519,783  
Operating Segments | Shale          
Segment Reporting [Line Items]          
(Loss) Gain on Commodity Derivative Instruments 49,149 21,014 (116,803) (114,942)  
Other Revenue and Operating Income 14,795 17,415 46,446 51,685  
Total Revenue and Other Operating Income 405,533 405,744 1,294,694 1,263,231  
Lease Operating Expense 17,105 20,972 47,211 58,405  
Production, Ad Valorem and Other Fees 5,220 6,180 16,736 19,889  
Depreciation, Depletion and Amortization 112,936 127,334 340,459 364,962  
Interest Expense 0 0 0 0  
Other Segment Items 0 0 0 0  
Total Costs and Expenses 216,432 234,967 659,036 681,836  
Income (Loss) Before Income Tax 189,101 170,777 635,658 581,395  
Segment Assets 7,280,951 7,152,404 7,280,951 7,152,404  
Capital Expenditures 127,481 67,428 425,020 280,663  
Operating Segments | Shale | Natural Gas, NGLs and Oil Revenue          
Segment Reporting [Line Items]          
Revenues 341,589 367,315 1,365,051 1,326,488  
Operating Segments | Shale | Purchased Gas Revenue          
Segment Reporting [Line Items]          
Revenues 0 0 0 0  
Operating Segments | Shale | Transportation, Gathering and Compression          
Segment Reporting [Line Items]          
Transportation, Gathering and Compression 81,171 80,481 254,630 238,580  
Operating Segments | Coalbed Methane          
Segment Reporting [Line Items]          
(Loss) Gain on Commodity Derivative Instruments 3,286 1,358 (6,874) (7,728)  
Other Revenue and Operating Income 0 0 0 0  
Total Revenue and Other Operating Income 33,971 34,103 111,205 101,475  
Lease Operating Expense 6,496 6,298 18,812 18,283  
Production, Ad Valorem and Other Fees 1,438 1,477 5,234 4,695  
Depreciation, Depletion and Amortization 14,803 15,096 44,093 43,714  
Interest Expense 0 0 0 0  
Other Segment Items 0 0 0 0  
Total Costs and Expenses 35,702 39,066 112,298 115,997  
Income (Loss) Before Income Tax (1,731) (4,963) (1,093) (14,522)  
Segment Assets 867,077 915,031 867,077 915,031  
Capital Expenditures 9,525 6,258 21,211 35,506  
Operating Segments | Coalbed Methane | Natural Gas, NGLs and Oil Revenue          
Segment Reporting [Line Items]          
Revenues 30,685 32,745 118,079 109,203  
Operating Segments | Coalbed Methane | Purchased Gas Revenue          
Segment Reporting [Line Items]          
Revenues 0 0 0 0  
Operating Segments | Coalbed Methane | Transportation, Gathering and Compression          
Segment Reporting [Line Items]          
Transportation, Gathering and Compression 12,965 16,195 44,159 49,305  
Other          
Segment Reporting [Line Items]          
(Loss) Gain on Commodity Derivative Instruments 108,128 109,323 464,557 147,266  
Other Revenue and Operating Income 27,704 24,714 84,253 84,271  
Total Revenue and Other Operating Income 140,500 143,993 579,243 263,944  
Lease Operating Expense 238 (143) 848 27  
Production, Ad Valorem and Other Fees 11 68 34 82  
Depreciation, Depletion and Amortization 6,906 6,893 20,938 20,303  
Interest Expense 39,588 42,964 119,081 128,616  
Other Segment Items 61,444 (6,044) 186,906 101,974  
Total Costs and Expenses 108,683 44,115 329,275 252,282  
Income (Loss) Before Income Tax 31,817 99,878 249,968 11,662  
Equity in earnings (loss) of unconsolidated affiliates 227 1,297 1,334 749  
Segment Assets 1,011,986 836,683 1,011,986 836,683  
Capital Expenditures 2,146 1,858 4,827 4,405  
Other | Natural Gas, NGLs and Oil Revenue          
Segment Reporting [Line Items]          
Revenues 242 930 864 1,422  
Other | Purchased Gas Revenue          
Segment Reporting [Line Items]          
Revenues 4,426 9,026 29,569 30,985  
Other | Transportation, Gathering and Compression          
Segment Reporting [Line Items]          
Transportation, Gathering and Compression 496 377 1,468 1,280  
Other | Enviromental Attributes          
Segment Reporting [Line Items]          
Other Revenue and Operating Income $ 17,370 $ 17,949 $ 46,746 $ 61,234