Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 27, 2021	Mar. 28, 2020
Numerator
Net income	$ 32,730	$ 22,775
Denominator:
Weighted average basic shares outstanding	32,048	32,354
Effect of stock-based compensation awards	136	72
Weighted average diluted shares outstanding	32,184	32,426
Earnings Per Share:
Basic	$ 1.02	$ 0.70
Diluted	$ 1.02	$ 0.70

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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- Definition

The amount of net income (loss) for 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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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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