Summary of Significant Accounting Policies - Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Schedule Of Computation Of Basic And Diluted Earnings Per Common Share [Line Items]
Document Period End Date	Mar. 28, 2020
Net (loss) income	$ (18,135)	$ 22,520
Weighted-average shares outstanding	28,297	27,863
Dilutive effect of employee stock options and restricted shares	0	900
Diluted weighted-average shares outstanding	28,297	28,763
Basic income per share	$ (0.64)	$ 0.81
Diluted income per share	$ (0.64)	$ 0.78
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	800	0