FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2012

FAIR VALUE MEASUREMENTS

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

	March 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:
Treasury and government agency money market funds	$	284,629	$	—	$	—	$	284,629
Commercial paper		—		176,963		—		176,963
Time deposits		—		4,650		—		4,650
Marketable securities:
Corporate debt securities		—		39,044		—		39,044
States of the U.S. and state political subdivisions		—		112,505		—		112,505
Long-term investments:
Auction rate security		—		—		7,720		7,720
Marketable equity securities		107,842		—		—		107,842
Total	$	392,471	$	333,162	$	7,720	$	733,353

	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)

	Three Months Ended March 31,
	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 (realized and unrealized):
Included in other comprehensive income		1,850		—			950			—
Fair value at date of acquisition		—		—			—			(40,000	)
Settlements		—		10,000			(5,000	)		—
Balance at March 31	$	7,720	$	—		$	9,050		$	(40,000	)