STOCK-BASED COMPENSATION (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	$ 1,876,000	$ 1,878,000	$ 4,145,000	$ 4,092,000
Unrecognized total compensation cost
Unrecognized stock-based compensation expense related to non-vested stock-based awards	17,200,000		17,200,000
Estimated forfeitures	3,700,000		3,700,000
Weighted-average period over which unrecognized stock-based compensation cost is expected to be recognized			1 year 9 months 18 days
Cost of sales
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	244,000	184,000	453,000	301,000
Selling, general and administrative expenses
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	1,373,000	1,469,000	3,193,000	3,308,000
Research and development expense
Total stock-based compensation expense included in the Company's consolidated statements of operations
Stock-based compensation expense	$ 259,000	$ 225,000	$ 499,000	$ 483,000