CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Terminalling and storage	$ 54,211	$ 46,823	$ 19,998
Marine transportation	23,478	28,194	19,370
Product Sales	15,561	14,998	5,838
Cost of products sold: (excluding depreciation and amortization)
Natural gas services	106,312	79,321	56,914
Sulfur services	18,314	16,061	12,583
Expenses:
Operating expenses	59,134	49,286	37,284
Selling, general and administrative	$ 12,852	$ 10,918	$ 7,162