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Exit Costs - Exit Costs Included in Accrued Liabilities in Consolidated Balance Sheet - (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Exit costs included in accrued liabilities in consolidated balance sheet    
Ending balance $ 344,308  
Exit Costs | LOUISIANA    
Exit costs included in accrued liabilities in consolidated balance sheet    
Beginning balance 397,449 $ 390,620
Accretion of discount 39,185 41,860
Changes in estimate (2,097) 57,735
Payments (90,229) (92,766)
Ending balance 344,308 397,449
Exit Costs | Pennsylvania Pipeline    
Exit costs included in accrued liabilities in consolidated balance sheet    
Beginning balance 2,540 5,060
Accretion of discount 126 345
Changes in estimate 0 0
Payments (2,666) (2,865)
Ending balance $ 0 $ 2,540