v3.25.3
Intangible Assets (Schedule of Components of Intangible Assets) (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 181,083 $ 180,734
Accumulated Amortization 103,099 95,447
Carrying Value 77,984 85,287
Offshore pipeline contract intangibles | Offshore pipeline transportation    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 158,101 158,101
Accumulated Amortization 84,598 78,357
Carrying Value 73,503 79,744
Other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 22,982 22,633
Accumulated Amortization 18,501 17,090
Carrying Value $ 4,481 $ 5,543