OTHER CURRENT LIABILITIES - Summary of Other Current Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 30, 2012
Other Liabilities Disclosure [Abstract]
Accrued compensation	$ 12,364	$ 13,996
Deferred revenue	4,820	6,020
Accrued non-income taxes	3,779	3,885
Current portion of pension	2,058	2,058
Accrued customer rebates	4,184	4,814
Other current liabilities	11,214	12,461
Total	$ 38,419	$ 43,234