Net Income Per Common Share - Calculation of EPS and Reconciliation of Weighted Average Common Shares Used in Calculation of Basic and Diluted EPS (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2020	Jun. 29, 2019	Jul. 04, 2020	Jun. 29, 2019
Earnings Per Share [Abstract]
Net income	$ 2,199	$ 17,045	$ 17,799	$ 25,302
Weighted-average common shares - Basic	58,943	58,394	58,806	58,264
Add: Dilutive effect of stock compensation plans	197	897	341	984
Weighted-average common shares - Diluted	59,140	59,291	59,147	59,248
Net income per common share:
Basic	$ 0.04	$ 0.29	$ 0.30	$ 0.43
Diluted	$ 0.04	$ 0.29	$ 0.30	$ 0.43