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Cash, Cash Equivalents and Short-Term Investments - Contractual Maturities (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Cash, Cash Equivalents and Short-Term Investments |  |
Due within one year, Amortized Cost | $ 100,284 | $ 39,081
Due after one year through five years, Amortized Cost | 325,682 | 328,776
Due after five years through ten years, Amortized Cost |  | 15,690
Total, Amortized Cost | 425,966 | 383,547
Due within one year, Fair Value | 98,528 | 39,035
Due after one year through five years, Fair Value | 301,526 | 325,047
Due after five years through ten years, Fair Value |  | 15,610
Total, Fair Value | $ 400,054 | $ 379,692

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