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EARNINGS PER SHARE (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 29, 2014
Mar. 30, 2013
Numerator:    
Net income $ 24,319 $ 23,718
Denominator:    
Weighted average number of common shares outstanding - Basic 19,365,951 19,281,969
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans 533,533 517,904
Weighted average number of common shares outstanding - Diluted 19,899,484 19,799,873