Repurchase of Common Stock (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Repurchase of Common Stock [Abstract]
Amount repurchased under Board-approved share repurchase program	$ 30,019	$ 10,011	$ 50,026	$ 20,022
Stock Repurchase Acquired Through Tax Withholding Restricted Stock	1,135	1,223	1,603	1,448
Total amount repurchased	31,154	$ 11,234	51,629	$ 21,470
Remaining Authorized Amount, Stock Repurchase Program	$ 185,000		$ 185,000