Stockholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Apr. 25, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchased and Retired During Period, Shares	1,800,000	600,000
Stock repurchased and retired during the period, value	$ 86,600	$ 23,300
Remaining Number of Shares Authorized to be Repurchased	2,500,000
Shares Repurchased And Retired Related to Net of Issuances Shares, Shares	127,000	99,000
Restricted stock unit tax withholdings	$ 6,017	$ 4,364
Number of shares authorized to be repurchased			3,000,000