Net Income Per Share (Schedule of Net Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Numerator:
Net income	$ 17,834	$ 5,983	$ 40,794	$ 1,810
Denominator:
Weighted average common shares - basic	30,574	29,617	30,614	29,608
Potentially dilutive common share equivalent	890	453	1,034	471
Weighted average common shares - dilutive	31,464	30,070	31,648	30,079
Basic net income per share	$ 0.58	$ 0.20	$ 1.33	$ 0.06
Diluted net income per share	$ 0.57	$ 0.20	$ 1.29	$ 0.06
Anti-dilutive employee stock-based awards, excluded	348	2,245	347	2,425