Business Segment, Geographic And Concentration Risk Information (Long lived Tangible Assets by Region) (Details) - USD ($) $ in Thousands	Dec. 30, 2016	Jan. 01, 2016	Jan. 02, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived tangible assets	$ 372,042	$ 379,492	$ 144,925
UNITED STATES [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived tangible assets	258,899	264,556	113,851
Rest Of World [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived tangible assets	$ 113,143	$ 114,936	$ 31,074