Intangible Assets (Schedule of Components of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 181,509	$ 181,261
Accumulated Amortization	108,186	105,655
Carrying Value	73,323	75,606
Offshore pipeline contract intangibles | Offshore pipeline transportation
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	158,101	158,101
Accumulated Amortization	88,758	86,678
Carrying Value	69,343	71,423
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23,408	23,160
Accumulated Amortization	19,428	18,977
Carrying Value	$ 3,980	$ 4,183