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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disaggregation of Revenue |  |
Revenues | $ 192,543 | $ 180,830
Sulfur services |  |
Disaggregation of Revenue |  |
Revenues | 4,223 | 3,477
Terminalling and storage segment |  |
Disaggregation of Revenue |  |
Revenues | 21,549 | 22,517
Terminalling and storage segment | Throughput and storage |  |
Disaggregation of Revenue |  |
Revenues | 21,549 | 22,517
Transportation segment |  |
Disaggregation of Revenue |  |
Revenues | 52,985 | 58,307
Transportation segment | Land transportation |  |
Disaggregation of Revenue |  |
Revenues | 38,679 | 42,743
Transportation segment | Inland marine transportation |  |
Disaggregation of Revenue |  |
Revenues | 12,002 | 14,323
Transportation segment | Offshore marine transportation |  |
Disaggregation of Revenue |  |
Revenues | 2,304 | 1,241
Sulfur services segment |  |
Disaggregation of Revenue |  |
Revenues | 48,704 | 33,681
Sulfur services segment | Sulfur product sales |  |
Disaggregation of Revenue |  |
Revenues | 9,712 | 5,683
Sulfur services segment | Fertilizer product sales |  |
Disaggregation of Revenue |  |
Revenues | 34,769 | 24,521
Sulfur services segment | Sulfur services |  |
Disaggregation of Revenue |  |
Revenues | 4,223 | 3,477
Specialty products segment |  |
Disaggregation of Revenue |  |
Revenues | 69,305 | 66,325
Specialty products segment | Natural gas liquids product sales |  |
Disaggregation of Revenue |  |
Revenues | 42,120 | 38,131
Specialty products segment | Lubricant product sales |  |
Disaggregation of Revenue |  |
Revenues | $ 27,185 | $ 28,194

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