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EARNINGS PER SHARE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Numerator:
Net income	$ 11,963	$ 6,781	$ 45,026	$ 53,387
Denominator:
Weighted average number of common shares outstanding - Basic	18,701,530	19,417,437	18,692,755	19,398,184
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans	673,013	515,875	650,910	480,873
Weighted average number of common shares outstanding - Diluted	19,374,543	19,933,312	19,343,665	19,879,057

X

- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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