Business Segments And Geographic Information (Net Revenues And Other Financial Information By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 28, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 29, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Segment Reporting Information [Line Items]
Net revenues	$ 183,114	$ 160,595	$ 170,925	$ 147,406	$ 194,387	$ 174,888	$ 172,290	$ 148,173	$ 662,040	$ 689,738	$ 689,920
Long-lived assets	77,389				76,334				77,389	76,334
United States, Puerto Rico, & Dominican Republic
Segment Reporting Information [Line Items]
Net revenues									191,037	203,171	184,905
Long-lived assets	7,491				8,430				7,491	8,430
Europe
Segment Reporting Information [Line Items]
Net revenues									247,413	255,610	276,028
Long-lived assets	11,328				13,524				11,328	13,524
International Americas
Segment Reporting Information [Line Items]
Net revenues									27,078	32,523	37,131
Long-lived assets	1,343				1,432				1,343	1,432
Asia Pacific
Segment Reporting Information [Line Items]
Net revenues									196,512	198,434	191,856
Long-lived assets	57,227				52,948				57,227	52,948
United States
Segment Reporting Information [Line Items]
Net revenues									191,000	203,200	184,900
Long-lived assets					8,400					8,400
Germany
Segment Reporting Information [Line Items]
Net revenues									77,100	81,700
China
Segment Reporting Information [Line Items]
Long-lived assets	37,400				33,800				37,400	33,800
Japan
Segment Reporting Information [Line Items]
Long-lived assets	$ 8,300				$ 9,800				$ 8,300	$ 9,800