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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Numerator:
Net income	$ 15,503us-gaap_NetIncomeLoss	$ 24,319us-gaap_NetIncomeLoss
Denominator:
Weighted average number of common shares outstanding - Basic	18,678,485us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	19,365,951us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of options and restricted stock units outstanding under the Company's employee compensation plans	561,052us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	533,533us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average number of common shares outstanding - Diluted	19,239,537us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	19,899,484us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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