Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 01, 2014	Apr. 02, 2013
Net income per share
Antidilutive securities excluded from calculation of basic earnings per share (in shares)	700,000	2,400,000
Net income per share, basic and diluted
Net income	$ 22,518	$ 25,292
Basic weighted average shares outstanding (in shares)	50,745,000	52,255,000
Dilutive effect of equity awards (in shares)	2,099,000	2,050,000
Diluted weighted average shares outstanding (in shares)	52,844,000	54,305,000
Basic net income per share (in dollars per share)	$ 0.44	$ 0.48
Diluted net income per share (in dollars per share)	$ 0.43	$ 0.47
Restricted stock
Net income per share
Antidilutive securities excluded from calculation of basic earnings per share (in shares)	1,800,000	1,400,000