FINANCIAL INSTRUMENTS (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Current Available-for-sale Marketable Securities

At September 30, 2018, current available-for-sale marketable debt securities are as follows:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(In thousands)
Treasury discount notes	$	34,867	$	—	$	(2	)	$	34,865
Total available-for-sale marketable debt securities	$	34,867	$	—	$	(2	)	$	34,865

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:

	September 30, 2018
	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	$	158,648	$	—	$	—	$	158,648
Commercial paper	—		48,048		—		48,048
Treasury discount notes	—		44,960		—		44,960
Time deposits	—		15,000		—		15,000
Marketable securities:
Treasury discount notes	—		34,865		—		34,865
Total	$	158,648	$	142,873	$	—	$	301,521

	December 31, 2017
	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	$	189,207	$	—	$	—	$	189,207
Treasury discount notes	—		500		—		500
Certificates of deposit	—		6,195		—		6,195
Total	$	189,207	$	6,695	$	—	$	195,902

Schedule of 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:

	September 30, 2018						December 31, 2017
	Carrying value			Fair value			Carrying value			Fair value
	(In thousands)
Current portion of long term debt	$	(13,750	)	$	(13,664	)	$	(13,750	)	$	(13,802	)
Long-term debt, net (a)	(248,455		)	(249,369		)	(258,312		)	(262,230		)
Current portion of long-term debt—related party	—			—			(816		)	(837		)
Long-term debt—related party, net	(1,048		)	(1,155		)	(1,997		)	(2,048		)

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^(a)  At September 30, 2018 and December 31, 2017, the carrying value of long-term debt, net includes unamortized debt issuance costs of $2.5 million and $2.9 million, respectively.