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		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Numerator
Net income	$ 13,885	$ 21,499	$ 36,660	$ 44,905
Denominator:
Weighted average basic shares outstanding	32,269	32,588	32,312	32,722
Effect of stock-based compensation awards	69	88	76	89
Weighted average diluted shares outstanding	32,338	32,676	32,388	32,811
Earnings Per Share:
Basic	$ 0.43	$ 0.66	$ 1.13	$ 1.37
Diluted	$ 0.43	$ 0.66	$ 1.13	$ 1.37