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NET INCOME PER SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 29, 2012
Jul. 01, 2011
Jun. 29, 2012
Jul. 01, 2011
Earnings Per Share [Abstract]        
Net income (in dollars) $ 10,337 $ 8,548 $ 11,867 $ 9,313
Weighted average number of common shares used in basic net income per common share 39,701,000 43,367,000 39,563,000 43,413,000
Dilutive effect of outstanding stock options and non-vested restricted stock 400,000 300,000 400,000 400,000
Weighted average number of common shares used in diluted net income per common share 40,097,000 43,674,000 39,993,000 43,784,000
Net income per common share [Abstract]        
Basic (in dollars per share) $ 0.26 $ 0.20 $ 0.30 $ 0.21
Diluted (in dollars per share) $ 0.26 $ 0.20 $ 0.30 $ 0.21
Anti-dilutive shares 700,000 1,000,000 800,000 700,000