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Consolidated Income Statements (Unaudited) (Parenthetical) (USD $)
In Thousands
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Costs and expenses:    
Selling and promotional expenses to related parties$ 151$ 2,702$ 612$ 7,694