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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense $ 11,336 $ 10,670 $ 8,691
Market-based restricted stock [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 4,960 4,135 2,929
Time-based restricted stock [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 5,419 5,545 4,732
Performance-based restricted stock
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 131 107 269
Stock options [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 17 43 41
Common stock [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 809 840 720
Cost of sales [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 344 295 312
Selling, general and administrative (1) [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 8,906 8,457 6,602
Research and development [Member]
      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense $ 2,086 $ 1,918 $ 1,777