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EARNINGS PER SHARE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Numerator:
Net income	$ 17,560	$ 22,286	$ 33,063	$ 46,605
Denominator:
Weighted average number of common shares outstanding - Basic	18,697,623	19,410,102	18,688,269	19,388,396
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans	649,435	533,411	620,478	511,610
Weighted average number of common shares outstanding - Diluted	19,347,058	19,943,513	19,308,747	19,900,006

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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