Shareholders' Equity Repurchase of Common Stock (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Amount repurchased under Board-approved share repurchase program	$ 125,000	$ 98,446	$ 45,044
Amount repurchased in connection with the vesting of employee restricted stock grants	1,693	1,755	1,448
Total amount repurchased	126,693	$ 100,201	$ 46,492
Remaining Authorization Stock Purchase Plan	$ 245,000