FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)

6 Months Ended

Jun. 30, 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 financial instruments that are measured at fair value on a recurring basis:

	June 30, 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	$	320,989	$	—	$	—		$	320,989
Commercial paper	—		109,629		—			109,629
Time deposits	—		100,822		—			100,822
Marketable securities:
Corporate debt security	—		1,014		—			1,014
Equity security	6,761		—		—			6,761
Long-term investments:
Auction rate security	—		—		8,760			8,760
Marketable equity securities	42,934		—		—			42,934
Total	$	370,684	$	211,465	$	8,760		$	590,909
Liabilities:
Contingent consideration arrangement	$	—	$	—	$	(46,912	)	$	(46,912	)

	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 tables present the changes in the Company's financial instruments that are measured at fair value on a recurring basis using significant unobservable inputs (Level 3):

	Three Months Ended June 30,
	2013					2012
	Auction Rate Security		Contingent Consideration Arrangement			Auction Rate Security
	(In thousands)
Balance at April 1	$	8,580	$	(42,295	)	$	7,720
Total net gains (losses) (unrealized):
Included in earnings	—		(4,249		)	—
Included in other comprehensive income (loss)	180		(368		)	(990		)
Balance at June 30	$	8,760	$	(46,912	)	$	6,730

	Six Months Ended June 30,
	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	—		(5,707		)	—		—
Included in other comprehensive income (loss)	660		(368		)	860		—
Fair value at date of acquisition	—		(40,837		)	—		—
Settlements	—		—			—		10,000
Balance at June 30	$	8,760	$	(46,912	)	$	6,730	$	—

Schedule of fair values of the financial instruments

The following table presents the carrying value and the fair value of financial instruments measured at fair value only for disclosure purposes:

	June 30, 2013						December 31, 2012
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Current maturities of long-term debt	$	—		$	—		$	(15,844	)	$	(15,875	)
Long-term debt, net of current maturities	(580,000		)	(554,419		)	(580,000		)	(581,994		)