Net Income (Loss) Per Share (Schedule of Net Income (Loss) Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 29, 2020	Mar. 31, 2019
Numerator:
Net income (loss)	$ (4,173)	$ 12,843
Denominator:
Weighted average common shares - basic	29,583	31,483
Potentially dilutive common share equivalent	0	1,391
Weighted average common shares - dilutive	29,583	32,874
Basic net income (loss) per share	$ (0.14)	$ 0.41
Diluted net income (loss) per share	$ (0.14)	$ 0.39
Anti-dilutive employee stock-based awards, excluded	2,485	507