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Investments (Narrative) (Details) - Level 1 - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]    
Fair market value of held-to-maturity securities $ 4.4 $ 5.2
Amortized cost of held-to-maturity securities $ 4.4 $ 5.2