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Investments - Components of Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | $ 580,918 |
Unrealized Gains | 26 |
Unrealized Losses | (274) |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 580,671 |
Cash and Cash Equivalents | 78,987 |
Marketable securities, current | 319,055 | $ 0
Marketable securities, non-current | 182,629 | 0
Equity Investments | 55,649 | $ 0
Asset backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 111,619 |
Unrealized Gains | 1 |
Unrealized Losses | (68) |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 111,552 |
Cash and Cash Equivalents | 0 |
Marketable securities, current | 5,372 |
Marketable securities, non-current | 106,180 |
Certificates of deposits |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 6,002 |
Unrealized Gains | 0 |
Unrealized Losses | 0 |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 6,002 |
Cash and Cash Equivalents | 0 |
Marketable securities, current | 6,002 |
Marketable securities, non-current | 0 |
Corporate notes and bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 207,169 |
Unrealized Gains | 21 |
Unrealized Losses | (201) |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 206,990 |
Cash and Cash Equivalents | 3,026 |
Marketable securities, current | 132,688 |
Marketable securities, non-current | 71,276 |
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 109,391 |
Unrealized Gains | 0 |
Unrealized Losses | 0 |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 109,391 |
Cash and Cash Equivalents | 24,193 |
Marketable securities, current | 85,198 |
Marketable securities, non-current | 0 |
Money market funds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 51,768 |
Unrealized Gains | 0 |
Unrealized Losses | 0 |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 51,768 |
Cash and Cash Equivalents | 51,768 |
Marketable securities, current | 0 |
Marketable securities, non-current |  |
Foreign government securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 8,186 |
Unrealized Gains | 0 |
Unrealized Losses | (5) |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 8,181 |
Cash and Cash Equivalents | 0 |
Marketable securities, current | 3,008 |
Marketable securities, non-current | 5,173 |
US Government Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Adjusted Cost Basis | 86,783 |
Unrealized Gains | 4 |
Unrealized Losses | 0 |
Cash, Cash Equivalents And Available-For-Sale Debt Securities | 86,787 |
Cash and Cash Equivalents | 0 |
Marketable securities, current | 86,787 |
Marketable securities, non-current | $ 0 |

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