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Cash, Cash Equivalents, Marketable Securities, and Restricted Cash (Tables) | 12 Months Ended
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Dec. 31, 2021
Cash, Cash Equivalents, and Short-term Investments [Abstract] |
Schedule of Cash and Available for Sale Securities | Cash, cash equivalents, and marketable securities are classified as current unless mentioned otherwise below and consisted of the following:
|  | As of December 31, 2021
(in thousands) |  | Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Cash and cash equivalents |  | $ | 245,197 |  |  | $ | — |  |  | $ | — |  |  | $ | 245,197 |
Commercial paper |  | 174,578 |  |  | 7 |  |  | (54) |  |  | 174,531 |
Corporate debt securities |  | 32,322 |  |  | — |  |  | (11) |  |  | 32,311 |
Asset-backed securities |  | 30,070 |  |  | — |  |  | (14) |  |  | 30,056 |
Money market |  | 350 |  |  | — |  |  | — |  |  | 350 |
Certificate of deposit |  | 51 |  |  | — |  |  | — |  |  | 51 |
|  | $ | 482,568 |  |  | $ | 7 |  |  | $ | (79) |  |  | $ | 482,496 |
Included in cash and cash equivalents |  | $ | 245,197 |  |  | $ | — |  |  | $ | — |  |  | $ | 245,197 |
Included in marketable securities |  | 237,371 |  |  | 7 |  |  | (79) |  |  | 237,299 |
Total cash, cash equivalents, and marketable securities |  | $ | 482,568 |  |  | $ | 7 |  |  | $ | (79) |  |  | $ | 482,496 |
|  | As of December 31, 2020
(in thousands) |  | Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Commercial paper |  | $ | 217,087 |  |  | $ | 14 |  |  | $ | (6) |  |  | $ | 217,095 |
Cash and cash equivalents |  | 163,240 |  |  | — |  |  | — |  |  | 163,240 |
U.S. government agency bonds |  | 53,583 |  |  | 3 |  |  | (4) |  |  | 53,582 |
Corporate debt securities |  | 39,525 |  |  | 4 |  |  | (16) |  |  | 39,513 |
Asset-backed securities |  | 9,420 |  |  | 18 |  |  | — |  |  | 9,438 |
Money market |  | 350 |  |  | — |  |  | — |  |  | 350 |
Certificate of deposit |  | 51 |  |  | — |  |  | — |  |  | 51 |
|  | $ | 483,256 |  |  | $ | 39 |  |  | $ | (26) |  |  | $ | 483,269 |
Included in cash and cash equivalents |  | $ | 163,240 |  |  | $ | — |  |  | $ | — |  |  | $ | 163,240 |
Included in marketable securities |  | 320,016 |  |  | 39 |  |  | (26) |  |  | 320,029 |
Total cash, cash equivalents, and marketable securities |  | $ | 483,256 |  |  | $ | 39 |  |  | $ | (26) |  |  | $ | 483,269 |
Schedule of Reconciliation of Cash and Cash Equivalents and Restricted Cash | The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the same such amounts shown in the Consolidated Statements of Cash Flows.
(in thousands) |  | December 31, 2021 |  | December 31, 2020 |  | December 31, 2019
Cash and cash equivalents |  | $ | 245,197 |  |  | $ | 163,240 |  |  | $ | 142,837 |
Restricted cash |  | 4,259 |  |  | 2,922 |  |  | 3,506 |
Cash, cash equivalents, and restricted cash shown in the Consolidated Statements of Cash Flows |  | $ | 249,456 |  |  | $ | 166,162 |  |  | $ | 146,343 |

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