Intangible Assets (Schedule of Components of Intangible Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 179,198	$ 181,261
Accumulated Amortization	110,539	105,655
Carrying Value	68,659	75,606
Offshore pipeline contract intangibles | Offshore pipeline transportation
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	158,101	158,101
Accumulated Amortization	92,918	86,678
Carrying Value	65,183	71,423
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,097	23,160
Accumulated Amortization	17,621	18,977
Carrying Value	$ 3,476	$ 4,183