SHAREHOLDERS' EQUITY AND EMPLOYEE BENEFIT PLANS (Total equity-based compensation expense) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jan. 02, 2016	Dec. 27, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Document Period End Date		Jan. 02, 2016
Total equity-based compensation expense		$ (62)	$ (3,435)
Market-based restricted stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense	[1]	(1,381)	(1,350)
Time-based restricted stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense	[1]	(1,486)	(1,869)
Performance-based restricted stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense	[1]	(43)	(33)
Stock options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense		0	(3)
Common stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense		0	(180)
Cost of sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense		(128)	(128)
Selling, general and administrative (1) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense	[2]	(770)	(2,499)
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total equity-based compensation expense		$ (704)	$ (808)

[1] The equity-based compensation expense for the three months ended January 2, 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 the three months ended January 2, 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.