XML 132 R106.htm IDEA: XBRL DOCUMENT v3.25.0.1
Asset Retirement Obligations - Schedule of Change in Asset Retirement Obligations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Change in asset retirement obligations    
Asset retirement obligations at the beginning of year $ 966,001 $ 797,762
Changes attributable to:    
Accretion expense 56,143 44,269
Settlements (18,379) (14,039)
Estimated cash flow revisions 142,821 135,323
Newly incurred obligation 0 2,686
Asset retirement obligations at the end of year $ 1,146,586 $ 966,001