Operating Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Operating Segment Information
External customer revenues	$ 484,042	$ 536,251	$ 948,333	$ 997,879
Operating income	58,351	58,212	102,316	100,285
Operating Segments [Member]
Operating Segment Information
External customer revenues	484,042	536,251	948,333	997,879
Affiliate revenues	41,296	39,355	79,476	74,190
Reportable Segment [Member]
Operating Segment Information
Operating income	75,196	69,218	133,558	120,387
Americas [Member]
Operating Segment Information
External customer revenues	308,775	325,732	608,397	602,730
Affiliate revenues	9,936	11,475	20,022	23,543
Operating income	44,698	40,001	80,976	71,118
EMEA [Member]
Operating Segment Information
External customer revenues	93,401	115,498	187,530	219,188
Affiliate revenues	29,960	27,482	57,448	50,148
Operating income	21,089	20,079	38,504	33,848
Asia Pacific [Member]
Operating Segment Information
External customer revenues	81,866	95,021	152,406	175,961
Affiliate revenues	1,400	398	2,006	499
Operating income	$ 9,409	$ 9,138	$ 14,078	$ 15,421