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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Disaggregation of Revenue |  |  |
Revenues |  | $ 180,830 | $ 244,529
Throughput and storage |  |  |
Disaggregation of Revenue |  |  |
Revenues | [1] | 22,517 | 20,858
Sulfur services |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 3,477 | 3,358
Terminalling and storage segment |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 22,517 | 20,858
Terminalling and storage segment | Throughput and storage |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 22,517 | 20,858
Transportation segment |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 58,307 | 55,723
Transportation segment | Land transportation |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 42,743 | 42,230
Transportation segment | Inland marine transportation |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 14,323 | 12,078
Transportation segment | Offshore marine transportation |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 1,241 | 1,415
Sulfur services segment |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 33,681 | 35,679
Sulfur services segment | Sulfur product sales |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 5,683 | 6,276
Sulfur services segment | Fertilizer product sales |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 24,521 | 26,045
Sulfur services segment | Sulfur services |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 3,477 | 3,358
Specialty products segment |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 66,325 | 132,269
Specialty products segment | Natural gas liquids product sales |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | 38,131 | 98,222
Specialty products segment | Lubricant product sales |  |  |
Disaggregation of Revenue |  |  |
Revenues |  | $ 28,194 | $ 34,047
[1] | Related Party Transactions Included Above
|  |  | Three Months Ended
|  |  | March 31,
|  |  |  |  | 2024 |  | 2023
Revenues:* |  |  |  |  |  |  |
Terminalling and storage |  |  |  |  | $ | 18,549 |  |  | $ | 17,502 |
Transportation |  |  |  |  | 8,601 |  |  | 5,511 |
Product Sales |  |  |  |  | 129 |  |  | 925 |
Costs and expenses:* |  |  |  |  |  |  |
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |  |  |
Specialty products |  |  |  |  | 6,573 |  |  | 9,510 |
Sulfur services |  |  |  |  | 2,993 |  |  | 2,708 |
Terminalling and storage |  |  |  |  | 18 |  |  | 6 |
Expenses: |  |  |  |  |  |  |
Operating expenses |  |  |  |  | 26,423 |  |  | 23,827 |
Selling, general and administrative |  |  |  |  | 6,863 |  |  | 8,516 |

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