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Selected Components of Working Capital - Accrued Liabilities Table (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Accrued interest expense $ 123,663 $ 136,006
Short-term asset retirement obligations 8,493 9,942
Short-term remediation and reclamation obligations 8,359 8,376
Income taxes payable 11,567 9,430
Contract liabilities 185,942 22,883
Accrued payroll and benefits 39,267 69,623
Short-term lease liabilities 67,675 65,295
Other 52,992 86,820
Total accrued liabilities 497,958 408,375
WES Operating [Member]    
Accrued interest expense 123,663 136,006
Short-term asset retirement obligations 8,493 9,942
Short-term remediation and reclamation obligations 8,359 8,376
Income taxes payable 12,271 9,430
Contract liabilities 185,942 22,883
Accrued payroll and benefits 0 4,450
Short-term lease liabilities 67,675 65,295
Other 50,146 70,491
Total accrued liabilities $ 456,549 $ 326,873