Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 26, 2014	Mar. 27, 2013
Earnings Per Share [Abstract]
Net income	$ 6,431	$ 7,081
Weighted average shares outstanding - basic (in shares)	88,803	92,350
Effect of dilutive share-based compensation awards	2,013	2,111
Weighted average shares outstanding - diluted (in shares)	90,816	94,461
Basic net income per share	$ 0.07	$ 0.08
Diluted net income per share	$ 0.07	$ 0.07
Antidilutive securities excluded from diluted weighted-average shares outstanding (in shares)	573	331