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Investments - Narrative (Details) - Level 1 - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Debt and Equity Securities, FV-NI [Line Items]    
Amortized cost of held-to-maturity securities $ 5.0 $ 4.4
Fair market value of held-to-maturity securities $ 5.0 $ 4.3