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Investment Securities (Narrative) (Details) $ in Millions | Dec. 31, 2023 USD ($) securities | Dec. 31, 2022 USD ($) securities
--- | --- | ---
Marketable Securities [Line Items] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | securities | 600 | 473
Debt Securities [Member] |  |
Marketable Securities [Line Items] |  |
Interest Receivable | $ | $ 34.1 | $ 10.6

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