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CONSOLIDATED STATEMENTS OF OPERATIONS - (Related Party Transactions) (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Revenues:      
Total revenues $ 1,018,878 $ 882,431 $ 672,142
Cost of products sold: (excluding depreciation and amortization)      
Total cost of products sold (excluding depreciation and amortization) 623,306 533,098 356,926
Expenses:      
Operating expenses 93,630 78,607 80,075
Selling, general and administrative 31,758 32,924 32,886
Terminalling and storage      
Revenues:      
Total revenues [1] 80,268 75,223 80,864
Transportation      
Revenues:      
Total revenues [1] 219,008 144,314 132,492
Product sales      
Revenues:      
Total revenues [1] 707,265 651,095 447,127
Sulfur services      
Revenues:      
Total revenues [1] 166,827 133,243 96,348
Cost of products sold: (excluding depreciation and amortization)      
Total cost of products sold (excluding depreciation and amortization) [1] 120,062 89,134 58,515
Terminalling and storage      
Revenues:      
Total revenues [1] 142,016 103,809 103,300
Cost of products sold: (excluding depreciation and amortization)      
Total cost of products sold (excluding depreciation and amortization) [1] 113,740 81,258 82,516
Related Party      
Expenses:      
Operating expenses 93,630 78,607 80,075
Related Party | Terminalling and storage      
Revenues:      
Total revenues 66,867 62,677 63,823
Related Party | Transportation      
Revenues:      
Total revenues 28,393 20,046 21,997
Expenses:      
Operating expenses 66,682 55,382 55,786
Related Party | Product sales      
Revenues:      
Total revenues 554 479 317
Related Party | Sulfur services      
Cost of products sold: (excluding depreciation and amortization)      
Total cost of products sold (excluding depreciation and amortization) 10,717 9,980 10,519
Expenses:      
Operating expenses 6,165 4,411 4,489
Related Party | Terminalling and storage      
Cost of products sold: (excluding depreciation and amortization)      
Total cost of products sold (excluding depreciation and amortization) 39,375 27,866 18,429
Expenses:      
Operating expenses $ 18,632 $ 16,776 $ 17,797
[1] Related Party Transactions Included Above
Year Ended December 31,
 202220212020
Revenues:   
Terminalling and storage$66,867 $62,677 $63,823 
Transportation28,393 20,046 21,997 
Product sales554 479 317 
Costs and expenses:   
Cost of products sold: (excluding depreciation and amortization)   
Sulfur services10,717 9,980 10,519 
          Terminalling and storage39,375 27,866 18,429 
Expenses:   
Operating expenses93,630 78,607 80,075 
Selling, general and administrative31,758 32,924 32,886