v3.26.3
Related Party Transactions - Schedule of Impact of Related Party Transactions (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenues:        
Revenues $ 231,727 $ 168,717 $ 633,001 $ 541,936
Cost of products sold:        
Cost of products sold 126,930 75,743 324,018 243,823
Operating expenses:        
Operating expenses [1] 71,392 64,882 207,145 193,718
Selling, general and administrative:        
Selling, general and administrative [1] 10,045 9,257 30,264 31,913
Terminalling and storage        
Revenues:        
Revenues [1] 24,008 23,930 70,188 67,883
Transportation        
Revenues:        
Revenues [1] 56,629 49,709 166,075 156,520
Product sales        
Revenues:        
Revenues [1] 146,863 91,005 383,884 305,164
Specialty products        
Revenues:        
Revenues [1] 89,502 62,443 234,256 192,066
Cost of products sold:        
Cost of products sold [1] 79,819 54,844 206,640 167,608
Sulfur services        
Revenues:        
Revenues [1] 57,361 28,562 149,628 113,098
Cost of products sold:        
Cost of products sold [1] 47,111 20,899 117,378 76,215
Related Party        
Revenues:        
Revenues 30,781 26,090 86,245 79,203
Cost of products sold:        
Cost of products sold 18,901 11,276 43,574 30,871
Operating expenses:        
Operating expenses 27,849 27,857 82,431 83,245
Selling, general and administrative:        
Selling, general and administrative 7,290 7,133 23,310 23,160
Related Party | Indirect, including overhead allocation        
Selling, general and administrative:        
Selling, general and administrative 3,402 3,375 10,136 10,517
Related Party | Terminalling and storage        
Revenues:        
Revenues 19,698 18,622 57,436 54,105
Operating expenses:        
Operating expenses 6,525 6,053 18,761 17,672
Selling, general and administrative:        
Selling, general and administrative 111 124 540 718
Related Party | Transportation        
Revenues:        
Revenues 9,698 6,521 25,624 21,811
Operating expenses:        
Operating expenses 19,304 20,282 59,325 61,271
Selling, general and administrative:        
Selling, general and administrative 2,142 1,907 6,600 6,115
Related Party | Product sales        
Revenues:        
Revenues 1,385 947 3,185 3,287
Related Party | Specialty products        
Revenues:        
Revenues 627 45 722 548
Cost of products sold:        
Cost of products sold 15,530 7,973 33,597 21,260
Selling, general and administrative:        
Selling, general and administrative 976 910 3,549 3,033
Related Party | Sulfur services        
Revenues:        
Revenues 758 902 2,463 2,739
Cost of products sold:        
Cost of products sold 3,371 3,303 9,977 9,611
Operating expenses:        
Operating expenses 2,020 1,522 4,345 4,302
Selling, general and administrative:        
Selling, general and administrative $ 659 $ 817 $ 2,485 $ 2,777
[1] Related Party Transactions Included Above
Three Months EndedNine Months Ended
September 30,September 30,
2026202520262025
Revenues:*
Terminalling and storage$19,698 $18,622 $57,436 $54,105 
Transportation9,698 6,521 25,624 21,811 
Product Sales1,385 947 3,185 3,287 
Costs and expenses:*
Cost of products sold: (excluding depreciation and amortization)
Specialty products15,530 7,973 33,597 21,260 
Sulfur services3,371 3,303 9,977 9,611 
Expenses:
Operating expenses27,849 27,857 82,431 83,245 
Selling, general and administrative7,290 7,133 23,310 23,160