Repurchase of Common Stock (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Repurchase of Common Stock [Abstract]
Amount repurchased under Board-approved share repurchase program	$ 25,000	$ 20,000	$ 75,000	$ 70,000
Amount repurchased in connection with the vesting of employee restricted stock grants	300	125	5,094	1,366
Total amount repurchased	25,300	$ 20,125	80,094	$ 71,366
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 170,000		$ 170,000