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		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Numerator
Net income	$ 21,308	$ 34,017	$ 66,213	$ 99,003
Denominator:
Weighted average basic shares outstanding	32,522	32,985	32,656	33,177
Effect of stock-based compensation awards	72	110	82	90
Weighted average diluted shares outstanding	32,594	33,095	32,738	33,267
Earnings Per Share:
Basic	$ 0.66	$ 1.03	$ 2.03	$ 2.98
Diluted	$ 0.65	$ 1.03	$ 2.02	$ 2.98