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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Numerator:
Net income	$ 23,718	$ 15,480
Denominator:
Weighted average number of common shares outstanding - Basic	19,281,969	19,116,765
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans	517,904	436,916
Weighted average number of common shares outstanding - Diluted	19,799,873	19,553,681

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