Other Non-Operating Income (Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended							9 Months Ended		12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 02, 2011	Jul. 03, 2011	Apr. 03, 2011	Sep. 30, 2012	Oct. 02, 2011	Dec. 31, 2011	Jan. 02, 2011
Other Non-Operating Income (Expense) [Abstract]
Foreign currency gain (loss)	$ 3,111				$ (6,707)			$ 3,179	$ (3,675)
Impairment write-down on a cost method investment	(112)				(231)			(498)	(3,379)
Gain on sales of cost method investments	0				0			7,258	4,031
Impairment write-down of a marketable equity security	0				(23,097)			0	(53,793)
Other, net	1,164				385			2,177	543
Total Other Non-Operating Income (Expense)	$ 4,163	$ (635)	$ 8,588	$ 1,073	$ (29,650)	$ (2,591)	$ (24,032)	$ 12,116	$ (56,273)	$ (55,200)	$ 7,515