v3.26.3
Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
 [2]
Net cash provided from operating activities included:      
Federal income taxes paid to taxing authorities $ (4,750) $ (3,800)  
State income taxes paid to taxing authorities [1] (6,325) (3,300)  
Interest paid (73,068) (99,385)  
Non-cash investing activities included:      
Increase in asset retirement costs capitalized 2,229 [2] 3,007 $ 8,367
Increase in accrued capital expenditures $ 4,331 $ 3,147  
[1] State income taxes paid relate exclusively to Pennsylvania.
[2]

(b) Includes costs incurred whether capitalized or expensed.