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ROYALTY EXPENSE (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Royalty Expense [Abstract]        
Royalty Expense $ 3,739 $ 2,263 $ 8,740 $ 7,530