CASH EQUIVALENTS, MARKETABLE SECURITIES AND LONG-TERM INVESTMENTS (Details) (USD $) In Thousands, unless otherwise specified			9 Months Ended
	Sep. 28, 2012	Dec. 31, 2011	Sep. 28, 2012 Maximum	Sep. 28, 2012 Minimum	Sep. 28, 2012 U.S. government agency notes	Dec. 31, 2011 U.S. government agency notes	Sep. 28, 2012 Foreign government notes	Dec. 31, 2011 Foreign government notes	Sep. 28, 2012 Corporate debt securities	Dec. 31, 2011 Corporate debt securities	Sep. 28, 2012 Commercial paper	Dec. 31, 2011 Commercial paper	Sep. 28, 2012 Certificates of deposit	Dec. 31, 2011 Certificates of deposit	Sep. 28, 2012 Asset-backed securities
Amortized cost, gross unrealized gains and losses and fair value of marketable debt and equity securities and investments
Cash equivalents, amortized cost	$ 45,009	$ 63,105
Cash equivalents, fair value	45,009	63,105
Marketable securities, amortized cost	206,501	223,954			66,711	106,631	3,753	1,770	113,503	73,218	5,484	22,787	17,050	19,548
Marketable securities, unrealized gains	125	162			20	100	2	1	77	52	10	1	16	8
Marketable securities, unrealized losses	(12)	(26)			(1)	(4)			(9)	(20)		(1)	(2)	(1)
Marketable securities, fair value	206,614	224,090			66,730	106,727	3,755	1,771	113,571	73,250	5,494	22,787	17,064	19,555
Investments, amortized cost	24,024	55,440			16,611	44,144			6,391	11,296					1,022
Investments, unrealized gains	45	13			25	4			18	9					2
Investments, unrealized losses	(11)	(26)				(18)			(8)	(8)					(3)
Investments, fair value	$ 24,058	$ 55,427			$ 16,636	$ 44,130			$ 6,401	$ 11,297					$ 1,021
Period considered to classify available-for-sale securities as marketable securities			1 year
Period considered to classify available-for-sale securities as investments				1 year