CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
OPERATING COSTS AND EXPENSES
Cost of petrochemical product Sales and Processing, depreciation	$ 825	[1]	$ 724	[1]

[1] Restated - See Notes 2 and 3