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Investments - Schedule of Contractual Maturities of Available-for-Sale and Held-to-Maturity Securities (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Available-for-sale, Amortized Cost
Within 1 year	$ 318,866
After 1 year through 5 years	174,034
Amortized Cost	492,900
Available-for-sale, Estimated Fair Value
Within 1 year	314,355
After 1 year through 5 years	166,978
Total	481,333
Held-to-maturity, Amortized Cost
Within 1 year	1,820
Total	1,820
Held-to-maturity, Estimated Fair Value
Within 1 year	1,820
Total	$ 1,820

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