Repurchase of Common Stock (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Repurchase of Common Stock [Abstract]
Amount repurchased under Board-approved share repurchase program	$ 75,000	$ 50,000
Amount repurchased in connection with the vesting of employee restricted stock grants	2,648	4,794
Total amount repurchased	77,648	$ 54,794
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 390,000