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Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Financial Instruments, Owned, at Fair Value [Abstract]

Cash, Cash Equivalents, And Marketable Securities

The following table summarizes the Company’s cash, cash equivalents, and marketable securities and the fair value categorization of the financial instruments measured at fair value on a recurring basis:

	March 31,				December 31,
	2018				2017
	(In thousands)
Cash	$	51,876			$	135,092
Time deposits	5,759				3,682
Money market funds (Level 1)	1,031,051				116,068
Debt securities issued by the U.S. Treasury (Level 1)	1,277,071				2,169,197
Total	$	2,365,757			$	2,424,039
Cash and cash equivalents	$	1,703,722			$	465,851
Restricted cash (included in Other long-term assets)	9,295				9,288
Total Cash, cash equivalents, and restricted cash	1,713,017				475,139
Marketable Securities	652,740				1,948,900
Total	$	2,365,757			$	2,424,039

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Tabular disclosure of the components of cash, cash equivalents, and investments.

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