Shareholders' Equity Repurchase of Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount	$ 500,000
Amount repurchased under Board-approved share repurchase program	150,000	$ 125,000	$ 98,446
Amount repurchased in connection with the vesting of employee restricted stock grants	5,245	1,693	1,755
Total amount repurchased	155,245	$ 126,693	$ 100,201
Remaining Authorization Stock Purchase Plan	$ 465,000