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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Sep. 28, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense $ 11,989 $ 11,336 $ 10,670
Market-based restricted stock [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 4,677 4,960 4,135
Time-based restricted stock [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 6,129 5,419 5,545
Performance-based restricted stock      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 131 131 107
Stock options [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 3 17 43
Common stock [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 1,049 809 840
Cost of sales [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 393 344 295
Selling, general and administrative (1) [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense 9,127 8,906 8,457
Research and development [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Total equity-based compensation expense $ 2,469 $ 2,086 $ 1,918