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OTHER COMPREHENSIVE INCOME (LOSS) (Details) (USD $)
 3 Months Ended 9 Months Ended
Sep. 27, 2013
Sep. 28, 2012
Sep. 27, 2013
Sep. 28, 2012
Total other comprehensive income (loss), net of tax        
Foreign currency translation $ 100,000 $ 400,000 $ (500,000) $ 400,000
Unrealized gain (loss) on investments 0 [1] 100,000 [1] 0 [1] 0 [1]
Total other comprehensive income (loss), net of tax $ 79,000 [2] $ 504,000 [2] $ (476,000) [2] $ 372,000 [2]
[1] Consists of deferred compensation plan accounts, which are comprised of mutual funds, and available-for-sale securities, which are comprised of certificates of deposits.
[2] The tax impact of the components of other comprehensive income were immaterial.