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Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2020	Mar. 29, 2019
Numerator:
Net income	$ 48,612	$ 75,775
Denominator:
Weighted-average common shares outstanding - basic (in shares)	305,388	300,542
Dilutive effect of employee stock plans (in shares)	10,451	14,102
Weighted-average common shares outstanding - diluted (in shares)	315,839	314,644
Net income per share - basic (in dollars per share)	$ 0.16	$ 0.25
Net income per share - diluted (in dollars per share)	$ 0.15	$ 0.24

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