FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2012

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:

	September 30, 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	$	184,449	$	—	$	—	$	184,449
Commercial paper	—		84,443		—		84,443
Time deposits	—		4,400		—		4,400
Marketable securities:
Corporate debt securities	—		15,632		—		15,632
States of the U.S. and state political subdivisions	—		112,991		—		112,991
Equity security	10,303		—		—		10,303
Long-term investments:
Auction rate security	—		—		7,330		7,330
Marketable equity securities	66,078		—		—		66,078
Total	$	260,830	$	217,466	$	7,330	$	485,626

	December 31, 2011
	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:
Treasury and government agency money market funds	$	321,314	$	—	$	—		$	321,314
Commercial paper	—		237,942		—			237,942
Time deposits	—		4,750		—			4,750
Marketable securities:
Corporate debt securities	—		48,705		—			48,705
States of the U.S. and state political subdivisions	—		112,323		—			112,323
Equity security	4,667		—		—			4,667
Long-term investments:
Auction rate security	—		—		5,870			5,870
Marketable equity securities	74,691		—		—			74,691
Total	$	400,672	$	403,720	$	5,870		$	810,262
Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(10,000	)	$	(10,000	)

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

The following tables present 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 September 30,
	2012		2011
	Auction Rate Security		Auction Rate Security			Contingent Consideration Arrangement
	(In thousands)
Balance at July 1	$	6,730	$	8,680		$	(10,000	)
Total net gains (losses) (realized and unrealized):
Included in other comprehensive income	600		(2,820		)	—
Balance at September 30	$	7,330	$	5,860		$	(10,000	)

	Nine Months Ended September 30,
	2012					2011
	Auction Rate Security		Contingent Consideration Arrangement			Auction Rate Securities			Contingent Consideration Arrangement
	(In thousands)
Balance at January 1	$	5,870	$	(10,000	)	$	13,100		$	—
Total net gains (losses) (realized and unrealized):
Included in other comprehensive income	1,460		—			(2,240		)	—
Fair value at date of acquisition	—		—			—			(40,000		)
Settlements	—		10,000			(5,000		)	30,000
Balance at September 30	$	7,330	$	—		$	5,860		$	(10,000	)