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Investment Securities - Narrative (Details)
$ in Millions
Jun. 30, 2024
USD ($)
investmentPosition
Dec. 31, 2023
USD ($)
Investments, Debt and Equity Securities [Abstract]    
Accrued investment interest $ 28.4 $ 24.7
Debt securities, unrealized loss position, number of positions | investmentPosition 637  
Equity securities without readily determinable fair value, amount $ 26.2 $ 11.7