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Investments - Contractual Maturities of Cash Equivalents And Available-for-Sale Debt Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Within 1 year, Amortized Cost	$ 399,939
After 1 year through 5 years, Amortized Cost	105,567
Total, Amortized Cost	566,493	$ 474,794
Within 1 year, Fair Value	399,341
After 1 year through 5 years, Fair Value	104,896
Total Fair Value	565,077	$ 473,121
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Asset-backed securities, Amortized Cost	60,987
Asset-backed securities, Fair Value	$ 60,840

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