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Marketable Securities (Tables) | 6 Months Ended
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Jun. 30, 2022
Investments, Debt and Equity Securities [Abstract] |
Summary of Available-for-Sale Marketable Securities | The following is a summary of available-for-sale marketable securities, excluding those securities classified within cash and cash equivalents on the condensed consolidated balance sheets as of June 30, 2022 and December 31, 2021 (in thousands):
| June 30, 2022
| Amortized Cost |  | Unrealized Gain |  | Unrealized Losses |  | Fair Value
Commercial debt securities | $ | 998,355 |  |  | $ | — |  |  | $ | (12,370) |  |  | $ | 985,985 |
Certificates of deposit | 72,843 |  |  | 3 |  |  | (167) |  |  | 72,679 |
U.S. government treasury securities | 179,598 |  |  | 6 |  |  | (1,425) |  |  | 178,179 |
Commercial paper | 220,720 |  |  | 8 |  |  | (849) |  |  | 219,879 |
Non-U.S. government securities | 8,027 |  |  | — |  |  | (68) |  |  | 7,959 |
Marketable securities | $ | 1,479,543 |  |  | $ | 17 |  |  | $ | (14,879) |  |  | $ | 1,464,681 |
| December 31, 2021
| Amortized Cost |  | Unrealized Gain |  | Unrealized Losses |  | Fair Value
Commercial debt securities | $ | 1,034,573 |  |  | $ | 43 |  |  | $ | (2,564) |  |  | $ | 1,032,052 |
Certificates of deposit | 14,574 |  |  | 5 |  |  | (10) |  |  | 14,569 |
U.S. government treasury securities | 77,628 |  |  | 18 |  |  | (204) |  |  | 77,442 |
Commercial paper | 151,379 |  |  | 14 |  |  | (37) |  |  | 151,356 |
Non-U.S. government securities | 8,071 |  |  | — |  |  | (17) |  |  | 8,054 |
Marketable securities | $ | 1,286,225 |  |  | $ | 80 |  |  | $ | (2,832) |  |  | $ | 1,283,473 |
Summary of Fair Values of Available-for-Sale Marketable Securities, by Remaining Contractual Maturity | As of June 30, 2022, the fair values of available-for-sale marketable securities, by remaining contractual maturity, were as follows (in thousands):
Due within one year | $ | 1,314,455 |
Due in one year through five years | 150,226 |
Total | $ | 1,464,681 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI https://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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