CONSOLIDATED STATEMENTS OF OPERATIONS - (Related Party Transactions) (Parenthetical) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues:
Revenues		$ 797,963	$ 1,018,878	$ 882,431
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		389,680	623,306	533,098
Expenses:
Operating expenses	[1]	252,211	251,886	193,952
Selling, general and administrative	[1]	40,826	41,812	41,012
Terminalling and storage
Revenues:
Revenues	[1]	86,514	80,193	75,223
Transportation
Revenues:
Revenues	[1]	223,677	219,008	144,314
Product sales
Revenues:
Revenues	[1]	474,342	707,340	651,095
Specialty products
Revenues:
Revenues	[1]	346,777	540,513	517,852
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	305,903	503,225	443,896
Sulfur services
Revenues:
Revenues	[1]	127,565	166,827	133,243
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	83,702	120,062	89,134
Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[1]	75	19	68
Related Party
Revenues:
Revenues		110,181	95,814	83,202
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		47,187	50,092	37,846
Expenses:
Operating expenses		100,851	93,630	78,607
Selling, general and administrative		32,021	31,758	32,924
Related Party | Terminalling and storage
Revenues:
Revenues		72,138	66,867	62,677
Related Party | Transportation
Revenues:
Revenues		29,276	28,393	20,046
Expenses:
Operating expenses		73,866	66,682	55,382
Selling, general and administrative		8,927	7,553	6,996
Related Party | Product sales
Revenues:
Revenues		8,767	554	479
Related Party | Specialty products
Revenues:
Revenues		8,547	404	370
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		35,930	39,356	27,856
Expenses:
Selling, general and administrative		4,152	5,565	7,414
Related Party | Sulfur services
Revenues:
Revenues		220	150	109
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		11,182	10,717	9,980
Expenses:
Operating expenses		5,738	6,165	4,411
Selling, general and administrative		3,714	3,917	3,276
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		75	19	10
Expenses:
Operating expenses		21,247	20,783	18,814
Selling, general and administrative		$ 780	$ 804	$ 546

[1] Related Party Transactions Included Above Year Ended December 31, 202320222021Revenues:   Terminalling and storage$72,138 $66,867 $62,677 Transportation29,276 28,393 20,046 Product sales8,767 554 479 Costs and expenses:   Cost of products sold: (excluding depreciation and amortization)   Specialty products35,930 39,356 27,856 Sulfur services11,182 10,717 9,980           Terminalling and storage75 19 10 Expenses:   Operating expenses100,851 93,630 78,607 Selling, general and administrative32,021 31,758 32,924