CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Related Party Transactions - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020		Jun. 30, 2019
Revenues:
Revenues	$ 140,638	$ 187,323	$ 339,521		$ 427,356
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	63,290	101,788	172,100		254,545
Expenses:
Operating expenses	19,440	24,407	41,211		46,943
Selling, general and administrative	8,055	8,558	16,367		17,093
Terminalling and storage
Revenues:
Revenues	19,908	21,377	40,382	[1]	44,481	[1]
Transportation
Revenues:
Revenues	31,485	41,321	70,426	[1]	79,116	[1]
Product Sales
Revenues:
Revenues	86,331	121,767	222,884	[1]	298,042	[1]
Sulfur services
Revenues:
Revenues	30,506	32,998	55,914		61,732
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	17,559	22,124	32,854	[1]	41,820	[1]
Terminalling and storage
Revenues:
Revenues	25,526	31,371	54,460		62,438
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	21,438	26,118	45,118	[1]	52,989	[1]
Related Party
Expenses:
Operating expenses	19,440	24,407	41,211		46,943
Related Party | Terminalling and storage
Revenues:
Revenues	15,942	17,477	31,816		36,449
Related Party | Transportation
Revenues:
Revenues	5,393	5,856	11,287		11,499
Related Party | Product Sales
Revenues:
Revenues	38	286	130		707
Related Party | Sulfur services
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	2,554	2,884	5,321		5,458
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	$ 4,249	$ 7,203	$ 10,026		$ 13,112

[1] Related Party Transactions Included Above Three Months EndedSix Months EndedJune 30,June 30,2020201920202019Revenues:*    Terminalling and storage$15,942  $17,477  $31,816  $36,449  Transportation5,393  5,856  11,287  11,499  Product Sales38  286  130  707  Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services2,554  2,884  5,321  5,458  Terminalling and storage4,249  7,203  10,026  13,112  Expenses:Operating expenses19,440  24,407  41,211  46,943  Selling, general and administrative8,055  8,558  16,367  17,093