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STOCK BASED COMPENSATION (Details) (USD $)
12 Months Ended
Sep. 30, 2013
Stock-Based Compensation  
Non-cash compensation expense related to stock-based awards $ 3,251,000
Estimated forfeiture rate (as a percent) 12.50%
RSUs
 
Stock-Based Compensation  
Unrecognized compensation cost related to unvested awards 15,400,000
Weighted-average period of recognition 1 year 8 months 12 days
Aggregate fair value of awards 10,600,000
RSUs | Cost of sales
 
Stock-Based Compensation  
Non-cash compensation expense related to stock-based awards 226,000
RSUs | Selling, general and administrative
 
Stock-Based Compensation  
Non-cash compensation expense related to stock-based awards $ 3,025,000