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Investment Securities - Narrative (Details) $ in Millions | Jun. 30, 2024 USD ($) investmentPosition | Dec. 31, 2023 USD ($)
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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

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