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Earnings Per Share - Computation of Basic and Diluted Earnings Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Net income	$ 2,060	$ 7,514
Weighted-average shares of common stock outstanding:
Basic	21,980	21,453
Dilutive effect of common stock equivalents arising from share option, nonvested share and nonvested share unit awards	251	369
Diluted	22,231	21,822
Basic earnings per share	$ 0.09	$ 0.35
Diluted earnings per share	$ 0.09	$ 0.34

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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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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