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Related Party Transactions - Schedule of the Impact of Related Party Transactions (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Revenues:      
Revenues $ 707,622 $ 797,963 $ 1,018,878
Cost of products sold:      
Cost of products sold 297,036 389,680 623,306
Operating expenses:      
Operating costs and expenses [1] 255,586 252,211 251,886
Selling, general and administrative:      
Selling, general and administrative expenses [1] 48,502 40,826 41,812
Terminalling and storage      
Revenues:      
Revenues [1] 89,067 86,514 80,193
Transportation      
Revenues:      
Revenues [1] 223,934 223,677 219,008
Specialty products      
Revenues:      
Revenues [1] 264,850 346,777 540,513
Cost of products sold:      
Cost of products sold [1] 228,600 305,903 503,225
Product sales      
Revenues:      
Revenues [1] 380,049 474,342 707,340
Sulfur services      
Revenues:      
Revenues [1] 115,199 127,565 166,827
Cost of products sold:      
Cost of products sold [1] 68,364 83,702 120,062
Terminalling and storage      
Cost of products sold:      
Cost of products sold [1] 72 75 19
Related Party      
Revenues:      
Revenues 106,170 110,181 95,814
Cost of products sold:      
Cost of products sold 43,776 47,187 50,092
Operating expenses:      
Operating costs and expenses 106,831 100,851 93,630
Selling, general and administrative:      
Selling, general and administrative expenses 39,385 32,021 31,758
Related Party | Indirect overhead allocation, net of reimbursement      
Selling, general and administrative:      
Selling, general and administrative expenses 14,235 14,448 13,919
Related Party | Terminalling and storage      
Revenues:      
Revenues 71,799 72,138 66,867
Related Party | Transportation      
Revenues:      
Revenues 33,250 29,276 28,393
Operating expenses:      
Operating costs and expenses 79,441 73,866 66,682
Selling, general and administrative:      
Selling, general and administrative expenses 11,218 8,927 7,553
Related Party | Specialty products      
Revenues:      
Revenues 352 8,547 150
Cost of products sold:      
Cost of products sold 31,789 35,930 39,356
Selling, general and administrative:      
Selling, general and administrative expenses 5,454 4,152 5,565
Related Party | Product sales      
Revenues:      
Revenues 457 8,767 554
Related Party | Sulfur services      
Revenues:      
Revenues 105 220 404
Cost of products sold:      
Cost of products sold 11,915 11,182 10,717
Operating expenses:      
Operating costs and expenses 4,888 5,738 6,165
Selling, general and administrative:      
Selling, general and administrative expenses 5,427 3,714 3,917
Related Party | Terminalling and storage      
Cost of products sold:      
Cost of products sold 72 75 19
Operating expenses:      
Operating costs and expenses 22,502 21,247 20,783
Selling, general and administrative:      
Selling, general and administrative expenses 3,051 780 804
Related Party | Sulfur Services      
Revenues:      
Revenues $ 664 $ 0 $ 0
[1] Related Party Transactions Included Above
Year Ended December 31,
 202420232022
Revenues:   
Terminalling and storage$71,799 $72,138 $66,867 
Transportation33,250 29,276 28,393 
Sulfur Services664 — — 
Product sales457 8,767 554 
Costs and expenses:   
Cost of products sold: (excluding depreciation and amortization)   
Specialty products31,789 35,930 39,356 
Sulfur services11,915 11,182 10,717 
          Terminalling and storage72 75 19 
Expenses:   
Operating expenses106,831 100,851 93,630 
Selling, general and administrative39,385 32,021 31,758