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Related Party Transactions - Schedule of the Impact of Related Party Transactions (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenues:        
Revenues $ 176,697 $ 229,305 $ 616,862 $ 775,502
Cost of products sold:        
Cost of products sold 75,782 152,187 312,849 480,695
Operating expenses:        
Operating expenses [1] 64,375 66,158 187,857 186,735
Selling, general and administrative:        
Selling, general and administrative [1] 10,424 10,273 30,043 31,420
Terminalling and storage        
Revenues:        
Revenues [1] 22,202 19,988 64,744 59,808
Transportation        
Revenues:        
Revenues [1] 55,223 58,993 165,696 161,535
Specialty products        
Revenues:        
Revenues [1] 66,695 121,456 277,836 409,215
Cost of products sold:        
Cost of products sold [1] 56,298 126,951 245,863 380,602
Product sales        
Revenues:        
Revenues [1] 95,914 147,239 376,349 544,906
Sulfur services        
Revenues:        
Revenues [1] 29,219 25,783 98,513 135,691
Cost of products sold:        
Cost of products sold [1] 19,461 25,230 66,932 100,078
Terminalling and storage        
Cost of products sold:        
Cost of products sold [1] 23 6 54 15
Related Party        
Revenues:        
Revenues 26,090 23,239 82,879 71,033
Cost of products sold:        
Cost of products sold 12,706 12,817 35,517 37,945
Operating expenses:        
Operating expenses 25,606 23,856 74,491 68,682
Selling, general and administrative:        
Selling, general and administrative 8,477 7,627 23,549 23,933
Related Party | Indirect, including overhead allocation        
Selling, general and administrative:        
Selling, general and administrative 3,612 3,465 10,853 10,413
Related Party | Terminalling and storage        
Revenues:        
Revenues 18,542 16,065 54,121 49,685
Operating expenses:        
Operating expenses 5,449 5,342 15,729 15,400
Selling, general and administrative:        
Selling, general and administrative 323 165 551 627
Related Party | Transportation        
Revenues:        
Revenues 7,426 7,111 20,214 20,862
Operating expenses:        
Operating expenses 18,531 17,220 54,546 48,954
Selling, general and administrative:        
Selling, general and administrative 2,307 1,766 6,509 5,569
Related Party | Specialty products        
Revenues:        
Revenues 59 46 8,348 400
Cost of products sold:        
Cost of products sold 9,896 10,196 27,324 30,047
Selling, general and administrative:        
Selling, general and administrative 1,101 1,288 2,982 4,386
Related Party | Product sales        
Revenues:        
Revenues 122 63 8,544 486
Related Party | Sulfur services        
Revenues:        
Revenues 63 17 196 86
Cost of products sold:        
Cost of products sold 2,787 2,616 8,139 7,884
Operating expenses:        
Operating expenses 1,626 1,294 4,216 4,328
Selling, general and administrative:        
Selling, general and administrative 1,134 943 2,654 2,938
Related Party | Terminalling and storage        
Cost of products sold:        
Cost of products sold $ 23 $ 5 $ 54 $ 14
[1] Related Party Transactions Included Above
Three Months EndedNine Months Ended
September 30,September 30,
2023202220232022
Revenues:*    
Terminalling and storage$18,542 $16,065 $54,121 $49,685 
Transportation7,426 7,111 20,214 20,862 
Product Sales122 63 8,544 486 
Costs and expenses:*
Cost of products sold: (excluding depreciation and amortization)
Specialty products9,896 10,196 27,324 30,047 
Sulfur services2,787 2,616 8,139 7,884 
Terminalling and storage23 5 54 14 
Expenses:
Operating expenses25,606 23,856 74,491 68,682 
Selling, general and administrative8,477 7,627 23,549 23,933