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Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share from Continuing Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	4 Months Ended
	Apr. 23, 2016	Apr. 25, 2015
Numerator:
Earnings from continuing operations	$ 9,960	$ 10,447
Adjustment for earnings attributable to participating securities	(178)	(189)
Earnings from continuing operations used in calculating earnings per share	$ 9,782	$ 10,258
Denominator:
Weighted average shares outstanding, including participating securities	37,488	37,689
Adjustment for participating securities	(669)	(682)
Shares used in calculating basic earnings per share	36,819	37,007
Effect of dilutive stock options	56	113
Shares used in calculating diluted earnings per share	36,875	37,120
Basic earnings per share from continuing operations	$ 0.27	$ 0.28
Diluted earnings per share from continuing operations	$ 0.27	$ 0.28

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Adjusted net income loss from continuing operations for earnings per share calculation.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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

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The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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