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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Cash, Cash Equivalents And Marketable Securities [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:
| As of December 31,
| 2018 |  | 2017
| (In thousands)
Cash | $ | 37,190 |  |  | $ | 135,092 |
Time deposits | 3,810 |  |  | 3,682 |
Money market funds (Level 1) | 120,832 |  |  | 116,068 |
Debt securities issued by the U.S. Treasury (Level 1) | 1,117,175 |  |  | 2,169,197 |
Total | $ | 1,279,007 |  |  | $ | 2,424,039 |
Cash and cash equivalents | $ | 357,415 |  |  | $ | 465,851 |
Restricted cash (included in Other long-term assets) | 9,338 |  |  | 9,288 |
Total Cash, cash equivalents, and restricted cash | 366,753 |  |  | 475,139 |
Marketable securities | 912,254 |  |  | 1,948,900 |
Total | $ | 1,279,007 |  |  | $ | 2,424,039 |

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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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- Definition Cash, Cash Equivalents, And Marketable Securities [Abstract] + References No definition available. + Details
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