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SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 02, 2016 | Sep. 30, 2017 | Oct. 01, 2016 | Oct. 03, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | $ 11,722 | $ 5,730 | [1] | $ 11,989
Market-based restricted stock [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 3,480 | (33) |  | 4,677
Time-based restricted stock [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 7,492 | 5,255 |  | 6,129
Performance-based restricted stock |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 0 | (43) |  | 131
Stock options [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 0 | 0 |  | 3
Common Stock |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 750 | 551 |  | 1,049
Cost of sales [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 463 | 421 |  | 393
Selling, general and administrative (1) [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | 9,015 | 3,244 | [2] | 9,127
Selling, general and administrative (1) [Member] | Forfeiture of Stock Awards [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) | $ (2,000) |  |  |  |
Research and development [Member] |  |  |  |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |  |  |
Total equity-based compensation expense (reversal) |  | $ 2,244 | $ 2,065 |  | $ 2,469
[1] | The equity-based compensation expense for fiscal 2016, includes the reversal of a $2.0 million expense due to the forfeiture of stock awards in connection with the October 2015 retirement of the Company's CEO.
[2] | The selling, general and administrative expense for fiscal 2016, includes the reversal of a $2.0 million expense due to the forfeiture of stock awards in connection with the October 2015 retirement of the Company's CEO.

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