Selected Components of Working Capital - Accrued Liabilities Table (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Accrued interest expense	$ 133,076	$ 136,006
Short-term asset retirement obligations	6,876	9,942
Short-term remediation and reclamation obligations	8,914	8,376
Income taxes payable	4,710	9,430
Contract liabilities	192,031	22,883
Accrued payroll and benefits	57,660	69,623
Short-term lease liabilities	75,930	65,295
Other	49,646	86,820
Total accrued liabilities	528,843	408,375
WES Operating [Member]
Accrued interest expense	133,076	136,006
Short-term asset retirement obligations	6,876	9,942
Short-term remediation and reclamation obligations	8,914	8,376
Income taxes payable	5,368	9,430
Contract liabilities	192,031	22,883
Accrued payroll and benefits	1,062	4,450
Short-term lease liabilities	75,930	65,295
Other	48,668	70,491
Total accrued liabilities	$ 471,925	$ 326,873

Carrying value of the obligation (known or estimated) arising from requirements to perform activities to remediate one or more sites, payable in twelve months or in the next operating cycle if longer.

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