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. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Numerator
Net income	$ 21,499	$ 34,339	$ 44,905	$ 64,985
Denominator:
Weighted average basic shares outstanding	32,588	33,146	32,722	33,273
Effect of stock-based compensation awards	88	80	89	82
Weighted average diluted shares outstanding	32,676	33,226	32,811	33,355
Earnings Per Share:
Basic	$ 0.66	$ 1.04	$ 1.37	$ 1.95
Diluted	$ 0.66	$ 1.03	$ 1.37	$ 1.95