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Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share for Continuing Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 12, 2014	Jul. 20, 2013	Jul. 12, 2014	Jul. 20, 2013
Numerator:
Earnings from continuing operations	$ 17,395	$ 8,056	$ 29,914	$ 16,968
Adjustment for earnings attributable to participating securities	(296)	(184)	(535)	(410)
Earnings from continuing operations used in calculating earnings per share	$ 17,099	$ 7,872	$ 29,379	$ 16,558
Denominator:
Weighted average shares outstanding, including participating securities	37,744	21,858	37,662	21,796
Adjustment for participating securities	(642)	(499)	(673)	(527)
Shares used in calculating basic earnings per share	37,102	21,359	36,989	21,269
Shares used in calculating basic earnings per share	37,102	21,359	36,989	21,269
Effect of dilutive stock options	66	82	76	79
Shares used in calculating diluted earnings per share	37,168	21,441	37,065	21,348
Basic earnings per share from continuing operations	$ 0.46	$ 0.37	$ 0.79	$ 0.78
Diluted earnings per share from continuing operations	$ 0.46	$ 0.37	$ 0.79	$ 0.78

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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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