Business Segment Information (Narrative) (Details) $ in Thousands |
9 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2025
USD ($)
segment
|
Sep. 30, 2024
USD ($)
|
Dec. 31, 2024
USD ($)
|
|
| Segment Reporting [Abstract] | |||
| Number of reportable segments | segment | 3 | ||
| Segment Reporting Information [Line Items] | |||
| Assets held for discontinued operations | $ 0 | $ 2,207,420 | |
| Capital Expenditures | $ 122,371 | $ 292,742 | |
| Costs incurred, percentage | 1 | 1 | |
| Operating Segments | |||
| Segment Reporting Information [Line Items] | |||
| Capital Expenditures | $ 121,381 | $ 282,082 | |
| Operating Segments | Offshore pipeline transportation | |||
| Segment Reporting Information [Line Items] | |||
| Capital Expenditures | 75,332 | 193,875 | |
| Operating Segments | Marine transportation | |||
| Segment Reporting Information [Line Items] | |||
| Capital Expenditures | 40,393 | 72,266 | |
| Operating Segments | Onshore transportation and services | |||
| Segment Reporting Information [Line Items] | |||
| Capital Expenditures | 5,656 | 15,941 | |
| Other | |||
| Segment Reporting Information [Line Items] | |||
| Capital Expenditures | $ 990 | $ 10,660 | |