Quarterly report pursuant to sections 13 or 15(d)

CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (Parenthetical)

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CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
OPERATING COSTS AND EXPENSES        
Cost of petrochemical product Sales and Processing, depreciation $ 749 $ 699 $ 1,473 $ 1,372