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Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2019
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:
| June 30, |  | December 31,
| 2019 |  | 2018
| (In thousands)
Cash | $ | 26,451 |  |  | $ | 37,190 |
Time deposits | 4,134 |  |  | 3,810 |
Money market funds (Level 1) | 104,275 |  |  | 120,832 |
Debt securities issued by the U.S. Treasury (Level 1) | 1,099,456 |  |  | 1,117,175 |
Total | $ | 1,234,316 |  |  | $ | 1,279,007 |
Cash and cash equivalents | $ | 751,580 |  |  | $ | 357,415 |
Restricted cash (included in Other long-term assets) | 9,374 |  |  | 9,338 |
Total Cash, cash equivalents, and restricted cash | 760,954 |  |  | 366,753 |
Marketable securities | 473,362 |  |  | 912,254 |
Total | $ | 1,234,316 |  |  | $ | 1,279,007 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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