Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2020

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,
	2020		2019
	(In thousands)
Cash	$	24,850	$	33,238
Time deposits	5,044		3,924
Money market funds (Level 1)	128,213		149,624
Debt securities issued by the U.S. Treasury (Level 1)	989,934		1,040,678
Total	$	1,148,041	$	1,227,464
Cash and cash equivalents	$	498,693	$	508,196
Restricted cash (included in Other long-term assets)	9,409		9,405
Total Cash, cash equivalents, and restricted cash	508,102		517,601
Marketable securities	639,939		709,863
Total	$	1,148,041	$	1,227,464