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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. 18, 2020	Apr. 20, 2019
Numerator:
Earnings from continuing operations	$ 15,402	$ 7,521
Adjustment for earnings attributable to participating securities	(385)	(183)
Earnings from continuing operations used in calculating earnings per share	$ 15,017	$ 7,338
Denominator:
Weighted average shares outstanding, including participating securities	36,172	36,121
Adjustment for participating securities	(904)	(878)
Shares used in calculating basic and diluted earnings per share	35,268	35,243
Basic and diluted earnings per share from continuing operations	$ 0.43	$ 0.21

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

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Adjustment to net income loss attributable to participating securities.

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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