Business Segment, Geographic and Concentration Risk Information Business Segment, Geographic and Concentration Risk Information (Schedule of Revenue From External Customers Attributed to Foreign Countries By Geographic Area) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2015	Oct. 03, 2014	Oct. 02, 2015	Oct. 03, 2014
Revenue, Major Customer [Line Items]
Sales Revenue, Net	$ 146,637	$ 171,699	$ 482,847	$ 518,061
UNITED STATES
Revenue, Major Customer [Line Items]
Sales Revenue, Net	71,545	76,330	217,102	235,203
PUERTO RICO
Revenue, Major Customer [Line Items]
Sales Revenue, Net	26,816	34,581	98,247	101,064
BELGIUM
Revenue, Major Customer [Line Items]
Sales Revenue, Net	12,305	13,722	45,690	47,351
Rest Of World [Member]
Revenue, Major Customer [Line Items]
Sales Revenue, Net	$ 35,971	$ 47,066	$ 121,808	$ 134,443