Other Income, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Other Income, Net
Interest income	$ 366	$ 399	$ 1,275	$ 1,024
Gains on sale of marketable debt and equity securities, net	1,363	8	1,339	123
Gains on sale of non-marketable investments, net	6	0	1,196	0
Gains (losses) on securities in NQDC trust	206	(839)	2,057	3,237
Gains on foreign exchange	489	1,376	1,476	2,546
Write-down of non-marketable investments	0	(1,081)	(464)	(1,103)
Other income (expense), net	105	6	(151)	145
Total other income (expense), net	$ 2,535	$ (131)	$ 6,728	$ 5,972