FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2015

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:

	December 31, 2015
	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	$	601,848	$	—	$	—		$	601,848
Time deposits	—		125,038		—			125,038
Commercial paper	—		302,418		—			302,418
Marketable securities:
Corporate debt securities	—		27,578		—			27,578
Equity security	11,622		—		—			11,622
Long-term investments:
Auction rate security	—		—		4,050			4,050
Marketable equity security	7,542		—		—			7,542
Total	$	621,012	$	455,034	$	4,050		$	1,080,096
Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(33,873	)	$	(33,873	)

	December 31, 2014
	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	$	174,720	$	—	$	—		$	174,720
Time deposits	—		388,801		—			388,801
Commercial paper	—		42,914		—			42,914
Marketable securities:
Corporate debt securities	—		159,197		—			159,197
Equity security	1,451		—		—			1,451
Long-term investments:
Auction rate security	—		—		6,070			6,070
Marketable equity security	7,410		—		—			7,410
Total	$	183,581	$	590,912	$	6,070		$	780,563
Liabilities:
Contingent consideration arrangements	$	—	$	—	$	(30,140	)	$	(30,140	)

Schedule of Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis

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

	For the Year Ended
	December 31, 2015						December 31, 2014
	Auction Rate Security			Contingent Consideration Arrangements			Auction Rate Security			Contingent Consideration Arrangements
	(In thousands)
Balance at January 1	$	6,070		$	(30,140	)	$	8,920		$	(45,828	)
Total net gains (losses):
Included in earnings:
Fair value adjustments	—			15,461			—			13,367
Foreign currency exchange gains	—			626			—			—
Included in other comprehensive (loss) income	(2,020		)	1,872			(2,850		)	3,025
Fair value at date of acquisition	—			(27,442		)	—			(8,813		)
Settlements	—			5,750			—			8,109
Balance at December 31	$	4,050		$	(33,873	)	$	6,070		$	(30,140	)

Carrying Value and Fair Value of Financial Instruments

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

	December 31, 2015						December 31, 2014
	Carrying Value			Fair Value			Carrying Value			Fair Value
	(In thousands)
Current maturities of long-term debt	$	(40,000	)	$	(39,850	)	$	—		$	—
Long-term debt, net of current maturities	$	(1,748,213	)	$	(1,761,601	)	$	(1,080,000	)	$	(1,099,813	)