Earnings Per Share - Schedule of Computation of Basic Earnings per Share and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018	Mar. 31, 2018
Numerator
Net income	$ 23,407	$ 30,647	$ 30,647
Denominator:
Weighted average basic shares outstanding	32,801	32,917
Effect of stock-based compensation awards	88	86
Weighted average diluted shares outstanding	32,889	33,003
Earnings Per Share:
Basic	$ 0.71	$ 0.93
Diluted	$ 0.71	$ 0.93

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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+ Details

- 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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+ Details

- Definition

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

+ References + Details