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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Statement of Financial Position [Abstract] |  |
Fixed maturities available-for-sale, amortized cost | $ 654.1 | $ 607.1
Short-term investments, cost | 20.5 | 27.5
Premium receivable, allowance for doubtful accounts | $ 2.8 | $ 2.8
Common stock, par value (usd per share) | $ 0.00001 | $ 0.00001
Common stock, authorized (in shares) | 200,000,000 | 200,000,000
Common stock, issued (in shares) | 73,212,871 | 72,720,866
Common stock, outstanding (in shares) | 73,212,871 | 72,720,866

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