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ROYALTY EXPENSE (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Royalty Expense [Abstract]        
Royalty Expense $ 3,675 $ 3,942 $ 11,246 $ 10,960