CONSOLIDATED STATEMENTS OF OPERATIONS - (Related Party Transactions) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017
Revenues:
Revenues		$ 847,118	$ 1,020,104	[1]	$ 973,386	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		492,795	659,306	[1]	594,675	[1]
Expenses:
Operating expenses		88,194	90,878	[2]	95,546	[2]
Selling, general and administrative		32,622	26,441	[2]	26,393	[2]
Terminalling and storage
Revenues:
Revenues	[3]	87,397	96,204	[1]	99,643	[1]
Transportation revenue
Revenues:
Revenues	[3]	159,622	150,121	[1]	135,350	[1]
Product sales
Revenues:
Revenues	[3]	588,665	762,631	[1]	727,441	[1]
Natural gas liquids
Revenues:
Revenues	[3]	366,502	496,007	[1]	473,317	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[3]	325,376	449,103	[1]	406,388	[1]
Sulfur services
Revenues:
Revenues	[3]	99,906	121,388	[1]	123,732	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[3]	65,893	83,641	[1]	76,119	[1]
Terminalling and storage
Revenues:
Revenues	[3]	122,257	145,236	[1]	130,392	[1]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold	[3]	101,526	126,562	[1]	112,168	[1]
Related Party
Expenses:
Operating expenses		88,194	90,878		95,546
Related Party | Terminalling and storage
Revenues:
Revenues		71,733	79,137	[2]	82,142	[2]
Related Party | Transportation revenue
Revenues:
Revenues		24,243	27,588	[2]	29,807	[2]
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		61,376	62,965		63,487
Related Party | Natural gas liquids
Revenues:
Revenues		0	0	[2]	122	[2]
Related Party | Product sales
Revenues:
Revenues		931	1,297	[2]	3,497	[2]
Related Party | Natural gas liquids
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		0	0	[2]	4,354	[2]
Related Party | Sulfur services
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		10,765	10,641	[2]	9,345	[2]
Related Party | Terminalling and storage
Cost of products sold: (excluding depreciation and amortization)
Cost of products sold		$ 23,859	$ 24,613	[2]	$ 16,672	[2]

[1] Financial information has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 2 – Significant Accounting Policies and Practices.

[2] Financial information has been revised to include results attributable to MTI acquired from Martin Resource Management Corporation. See Note 2 – Significant Accounting Policies and Practices.

[3] *Related Party Transactions Included Above   Year Ended December 31,   2019   2018¹   2017¹ Revenues:           Terminalling and storage $ 71,733
  $ 79,137
  $ 82,142
Transportation 24,243
  27,588
  29,807
Natural gas liquids —
  —
  122
Product sales 931
  1,297
  3,497
Costs and expenses:  
   
   
Cost of products sold: (excluding depreciation and amortization)  
   
   
Natural gas liquids —
  —
  4,354
Sulfur services 10,765
  10,641
  9,345
          Terminalling and storage 23,859
  24,613
  16,672
Expenses:  
   
   
Operating expenses 88,194
  90,878
  95,546
Selling, general and administrative 32,622
  26,441
  26,393