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Investments - Schedule of Contractual Maturities of Available-for-Sale and Held-to-Maturity Securities (Details) $ in Thousands	Sep. 30, 2023 USD ($)
Available-for-sale, Amortized Cost
Within 1 year	$ 214,322
After 1 year through 5 years	135,459
Amortized Cost	349,781
Available-for-sale, Estimated Fair Value
Within 1 year	212,122
After 1 year through 5 years	133,928
Total	346,050
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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