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Business Segment Information (Schedule of Revenues by Segment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | $ 770,055 | $ 617,729 | $ 607,473
Total revenues | 2,788,957 | 2,125,476 | 1,824,655
Offshore pipeline transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 319,045 | 278,459 | 237,146
Sodium minerals and sulfur services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 1,248,085 | 964,632 | 877,769
Onshore facilities and transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 928,532 | 691,558 | 499,482
Marine transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 293,295 | 190,827 | 210,258
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | 770,055 | 617,729 | 607,473
Capital Expenditures | 460,926 | 316,729 | 144,324
Total revenues | 2,788,957 | 2,125,476 | 1,824,655
Operating Segments | Offshore pipeline transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | 363,373 | 317,560 | 270,078
Capital Expenditures | 241,446 | 50,546 | 13,323
Total revenues | 319,045 | 278,459 | 237,123
Operating Segments | Sodium minerals and sulfur services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | 306,718 | 166,773 | 130,083
Capital Expenditures | 174,518 | 227,118 | 95,511
Total revenues | 1,258,236 | 973,354 | 886,078
Operating Segments | Onshore facilities and transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | 33,755 | 98,824 | 147,254
Capital Expenditures | 5,878 | 4,609 | 4,133
Total revenues | 918,751 | 685,652 | 500,420
Operating Segments | Marine transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total Segment Margin | 66,209 | 34,572 | 60,058
Capital Expenditures | 39,084 | 34,456 | 31,357
Total revenues | 292,925 | 188,011 | 201,034
Intersegment |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 0 | 0 | 0
Intersegment | Offshore pipeline transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 0 | 0 | 23
Intersegment | Sodium minerals and sulfur services |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (10,151) | (8,722) | (8,309)
Intersegment | Onshore facilities and transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 9,781 | 5,906 | (938)
Intersegment | Marine transportation |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ 370 | $ 2,816 | $ 9,224

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- Definition Revenues less product costs, operating expenses (excluding non-cash charges such as depreciation and amortization), and segment general and administrative expenses, plus our equity in distributable cash generated by our equity investees. Also excludes the non-cash effects of our stock appreciation rights compensation plan and includes the non-income portion of payments received under direct financing leases. + References No definition available. + Details
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