Summary of Significant Accounting Policies - 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								12 Months Ended
	Jan. 02, 2021	Oct. 03, 2020	Jul. 04, 2020	Apr. 04, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Numerator:
Net income	$ 9,987	$ 17,322	$ 2,199	$ 15,600	$ 3,280	$ 15,106	$ 17,045	$ 8,257	$ 45,108	$ 43,688	$ 53,933
Denominator:
Weighted-average common shares - Basic									58,887	58,346	52,461
Add: Dilutive effect of stock compensation plans									473	804	1,645
Weighted-average common shares - Diluted									59,360	59,150	54,106
Net income per common share:
Basic	$ 0.17	$ 0.29	$ 0.04	$ 0.27	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.77	$ 0.75	$ 1.03
Diluted	$ 0.17	$ 0.29	$ 0.04	$ 0.26	$ 0.06	$ 0.26	$ 0.29	$ 0.14	$ 0.76	$ 0.74	$ 1.00