Earnings Per Share - Antidilutive Securities Excluded from Computation of Diluted Net Income Per Share (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income per share	1,235	1,612
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income per share	5	124
Employee Stock Purchase Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of diluted net income per share	3	254