Net Income Per Share (Schedule Of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 03, 2016	Mar. 29, 2015
Earnings Per Share [Abstract]
Net income	$ 16,589	$ 8,011
Weighted average shares outstanding: Basic (in shares)	32,519	34,678
Potentially dilutive common share equivalent (in shares)	750	607
Weighted average common shares outstanding: dilutive (in shares)	33,269	35,285
Basic net income per share (in dollars per share)	$ 0.51	$ 0.23
Diluted net income per share (in dollars per share)	$ 0.50	$ 0.23
Anti-dilutive employee stock-based awards, excluded (in shares)	486	2,368