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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
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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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