FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

The following tables present the Company's assets and liabilities that are measured at fair value on a recurring basis:

	March 31, 2013
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)			Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	373,770	$	—	$	—		$	373,770
Commercial paper	—		89,987		—			89,987
Time deposits	—		93,843		—			93,843
Marketable securities:
Corporate debt security	—		1,021		—			1,021
Equity security	4,793		—		—			4,793
Long-term investments:
Auction rate security	—		—		8,580			8,580
Marketable equity securities	27,152		—		—			27,152
Total	$	405,715	$	184,851	$	8,580		$	599,146
Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(42,295	)	$	(42,295	)

	December 31, 2012
	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value Measurements
	(In thousands)
Assets:
Cash equivalents:
Money market funds	$	545,290	$	—	$	—	$	545,290
Time deposits	—		11,994		—		11,994
Marketable securities:
Corporate debt securities	—		13,627		—		13,627
Equity security	6,977		—		—		6,977
Long-term investments:
Auction rate security	—		—		8,100		8,100
Marketable equity securities	31,244		—		—		31,244
Total	$	583,511	$	25,621	$	8,100	$	617,232

Schedule of changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)

The following table presents the changes in the Company's assets and liabilities that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Three Months Ended March 31,
	2013					2012
	Auction Rate Security		Contingent Consideration Arrangement			Auction Rate Security		Contingent Consideration Arrangement
	(In thousands)
Balance at January 1	$	8,100	$	—		$	5,870	$	(10,000	)
Total net gains (losses) (unrealized):
Included in earnings	—		(1,458		)	—		—
Included in other comprehensive income	480		—			1,850		—
Fair value at date of acquisition	—		(40,837		)	—		—
Settlements	—		—			—		10,000
Balance at March 31	$	8,580	$	(42,295	)	$	7,720	$	—