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Available-For-Sale Securities (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Available-for-Sale Securities [Line Items]
Fair value of securities pledged as collateral	$ 111.9	$ 53.9
Securities delivered for repurchase agreements	18.9	17.8
Total fair value of investments	$ 212.2	$ 217.0
Fair value of debt securities, percentage	99.00%
Number of securities		139
Available-for-sale investment portfolio percentage	99.00%
Available-for-sale debt securities	$ 0.7

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Percentage of investment in available for sale securities.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as noncurrent.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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The carrying amount (fair value) as of the balance sheet date of securities held that had been pledged by counterparties under financing and lending arrangements, pursuant to which the entity has the right by agreement or custom to sell or re-pledge such securities.

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