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Business Segments - Income Statement (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Segment Reporting Information |  |
Total revenue | $ 180,830 | $ 244,529
Depreciation and Amortization | 12,649 | 12,901
Operating Income (Loss) after Eliminations | 17,895 | 17,505
Capital Expenditures and Plant Turnaround Costs | 17,393 | 7,620
Terminalling and storage |  |
Segment Reporting Information |  |
Total revenue | 22,517 | 20,858
Transportation |  |
Segment Reporting Information |  |
Total revenue | 58,307 | 55,723
Sulfur services |  |
Segment Reporting Information |  |
Total revenue | 33,681 | 35,679
Specialty products |  |
Segment Reporting Information |  |
Total revenue | 66,325 | 132,269
Operating Segments |  |
Segment Reporting Information |  |
Total revenue | 186,354 | 253,814
Operating Segments | Terminalling and storage |  |
Segment Reporting Information |  |
Total revenue | 24,285 | 23,919
Depreciation and Amortization | 5,395 | 5,599
Operating Income (Loss) after Eliminations | 1,957 | 64
Capital Expenditures and Plant Turnaround Costs | 7,050 | 3,785
Operating Segments | Transportation |  |
Segment Reporting Information |  |
Total revenue | 62,042 | 61,939
Depreciation and Amortization | 3,476 | 3,762
Operating Income (Loss) after Eliminations | 6,042 | 3,179
Capital Expenditures and Plant Turnaround Costs | 2,855 | 1,528
Operating Segments | Sulfur services |  |
Segment Reporting Information |  |
Total revenue | 33,681 | 35,679
Depreciation and Amortization | 2,982 | 2,677
Operating Income (Loss) after Eliminations | 6,773 | 7,404
Capital Expenditures and Plant Turnaround Costs | 6,336 | 2,048
Operating Segments | Specialty products |  |
Segment Reporting Information |  |
Total revenue | 66,346 | 132,277
Depreciation and Amortization | 796 | 863
Operating Income (Loss) after Eliminations | 6,959 | 11,056
Capital Expenditures and Plant Turnaround Costs | 1,152 | 259
Intersegment Revenues Eliminations |  |
Segment Reporting Information |  |
Total revenue | (5,524) | (9,285)
Intersegment Revenues Eliminations | Terminalling and storage |  |
Segment Reporting Information |  |
Total revenue | (1,768) | (3,061)
Intersegment Revenues Eliminations | Transportation |  |
Segment Reporting Information |  |
Total revenue | (3,735) | (6,216)
Intersegment Revenues Eliminations | Sulfur services |  |
Segment Reporting Information |  |
Total revenue | 0 | 0
Intersegment Revenues Eliminations | Specialty products |  |
Segment Reporting Information |  |
Total revenue | (21) | (8)
Indirect selling, general and administrative |  |
Segment Reporting Information |  |
Operating Income (Loss) after Eliminations | $ (3,836) | $ (4,198)

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