Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue
Revenues		$ 229,305	$ 211,258	$ 775,502	$ 596,525
Lubricant product sales
Disaggregation of Revenue
Revenues	[1]	40,546	30,598	110,130	75,606
Throughput and storage
Disaggregation of Revenue
Revenues	[1]	20,007	18,980	59,859	56,060
Natural gas liquids
Disaggregation of Revenue
Revenues	[1]	80,891	91,764	299,034	257,081
Sulfur services
Disaggregation of Revenue
Revenues		3,085	2,950	9,253	8,849
Terminalling and storage segment
Disaggregation of Revenue
Revenues		60,553	49,578	169,989	131,666
Terminalling and storage segment | Lubricant product sales
Disaggregation of Revenue
Revenues		40,546	30,598	110,130	75,606
Terminalling and storage segment | Throughput and storage
Disaggregation of Revenue
Revenues		20,007	18,980	59,859	56,060
Natural gas liquids segment
Disaggregation of Revenue
Revenues		80,891	91,764	299,034	257,081
Natural gas liquids segment | Natural gas liquids
Disaggregation of Revenue
Revenues		80,891	91,764	299,034	257,081
Sulfur services segment
Disaggregation of Revenue
Revenues		28,868	30,837	144,944	103,958
Sulfur services segment | Sulfur product sales
Disaggregation of Revenue
Revenues		10,341	7,768	33,975	22,222
Sulfur services segment | Fertilizer product sales
Disaggregation of Revenue
Revenues		15,442	20,119	101,716	72,887
Sulfur services segment | Sulfur services
Disaggregation of Revenue
Revenues		3,085	2,950	9,253	8,849
Transportation segment
Disaggregation of Revenue
Revenues		58,993	39,079	161,535	103,820
Transportation segment | Land transportation
Disaggregation of Revenue
Revenues		45,604	30,273	124,089	80,715
Transportation segment | Inland transportation
Disaggregation of Revenue
Revenues		11,542	7,465	31,997	20,822
Transportation segment | Offshore transportation
Disaggregation of Revenue
Revenues		$ 1,847	$ 1,341	$ 5,449	$ 2,283

[1] Related Party Transactions Included Above Three Months EndedNine Months EndedSeptember 30,September 30,2022202120222021Revenues:*    Terminalling and storage$16,065 $15,866 $49,685 $46,741 Transportation7,111 5,564 20,862 14,463 Product Sales61 68 477 253 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services2,616 2,441 7,884 7,379 Terminalling and storage10,202 7,259 30,062 18,863 Expenses:Operating expenses23,856 20,088 68,682 58,046 Selling, general and administrative7,626 7,659 23,932 23,624