CONSOLIDATED AND CONDENSED STATEMENTS OF OPERATIONS - Related Party Transactions - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Revenues:
Revenues	$ 152,533	$ 177,900	$ 492,054		$ 605,256
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	77,345	92,187	249,445		346,732
Expenses:
Operating expenses	18,915	21,745	60,126		66,409
Selling, general and administrative	8,356	8,358	24,723		24,148
Terminalling and storage
Revenues:
Revenues	20,706	21,193	61,088	[1]	65,674	[1]
Transportation
Revenues:
Revenues	31,938	40,211	102,364	[1]	119,327	[1]
Product Sales
Revenues:
Revenues	96,974	113,637	319,858	[1]	411,679	[1]
Sulfur services
Revenues:
Revenues	18,965	20,213	74,879		81,945
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	13,313	14,442	46,167	[1]	56,262	[1]
Terminalling and storage
Revenues:
Revenues	25,659	32,553	80,119		94,991
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	19,124	26,009	64,242	[1]	78,998	[1]
Related Party
Expenses:
Operating expenses	18,915	21,745	60,126		66,409
Related Party | Terminalling and storage
Revenues:
Revenues	15,902	17,538	47,718		53,987
Related Party | Transportation
Revenues:
Revenues	5,514	6,442	16,801		17,941
Related Party | Product Sales
Revenues:
Revenues	69	122	199		829
Related Party | Sulfur services
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	2,512	2,620	7,833		8,078
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	$ 4,303	$ 6,300	$ 14,329		$ 19,412

[1] Related Party Transactions Included Above Three Months EndedNine Months EndedSeptember 30,September 30,2020201920202019Revenues:*    Terminalling and storage$15,902 $17,538 $47,718 $53,987 Transportation5,514 6,442 16,801 17,941 Product Sales69 122 199 829 Costs and expenses:* Cost of products sold: (excluding depreciation and amortization) Sulfur services2,512 2,620 7,833 8,078 Terminalling and storage4,303 6,300 14,329 19,412 Expenses:Operating expenses18,915 21,745 60,126 66,409 Selling, general and administrative8,356 8,358 24,723 24,148