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Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue |  |  |  |
Total revenues |  | $ 797,963 | $ 1,018,878 | $ 882,431
Throughput and storage |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues | [1] | 86,514 | 80,193 | 75,223
Sulfur services |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 13,430 | 12,337 | 11,799
Terminalling and storage segment |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 86,514 | 80,193 | 75,223
Terminalling and storage segment | Throughput and storage |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 86,514 | 80,193 | 75,223
Transportation segment |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 223,677 | 219,008 | 144,314
Transportation segment | Land transportation |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 166,717 | 166,631 | 111,611
Transportation segment | Inland transportation |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 50,890 | 45,050 | 29,536
Transportation segment | Offshore transportation |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 6,070 | 7,327 | 3,167
Sulfur service segment |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 140,995 | 179,164 | 145,042
Sulfur service segment | Sulfur product sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 30,170 | 42,247 | 32,416
Sulfur service segment | Fertilizer product sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 97,395 | 124,580 | 100,827
Sulfur service segment | Sulfur services |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 13,430 | 12,337 | 11,799
Specialty products segment |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 346,777 | 540,513 | 517,852
Specialty products segment | Natural gas liquids product sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | 214,713 | 398,422 | 414,046
Specialty products segment | Lubricant product sales |  |  |  |
Disaggregation of Revenue |  |  |  |
Total revenues |  | $ 132,064 | $ 142,091 | $ 103,806
[1] | Related Party Transactions Included Above
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Revenues: |  |  |  |  |
Terminalling and storage | $ | 72,138 |  |  | $ | 66,867 |  |  | $ | 62,677 |
Transportation | 29,276 |  |  | 28,393 |  |  | 20,046 |
Product sales | 8,767 |  |  | 554 |  |  | 479 |
Costs and expenses: |  |  |  |  |
Cost of products sold: (excluding depreciation and amortization) |  |  |  |  |
Specialty products | 35,930 |  |  | 39,356 |  |  | 27,856 |
Sulfur services | 11,182 |  |  | 10,717 |  |  | 9,980 |
Terminalling and storage | 75 |  |  | 19 |  |  | 10 |
Expenses: |  |  |  |  |
Operating expenses | 100,851 |  |  | 93,630 |  |  | 78,607 |
Selling, general and administrative | 32,021 |  |  | 31,758 |  |  | 32,924 |

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