OTHER CURRENT LIABILITIES - Summary of Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 30, 2012
Other Liabilities Disclosure [Abstract]
Accrued compensation	$ 13,309	$ 13,996
Deferred revenue	5,198	6,020
Accrued non-income taxes	3,714	3,885
Current portion of pension	2,058	2,058
Accrued customer rebates	4,876	4,814
Other current liabilities	12,870	12,461
Total	$ 42,025	$ 43,234