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v3.25.4

Investments - Additional Information (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2025 USD ($) security | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
Net Investment Income [Line Items] |  |  |
Gross unrealized losses | $ 0.0 | $ 1.3 |
Number of debt securities held, unrealized loss position | security | 54 |  |
Gross unrealized losses, twelve months or more | $ 0.0 |  |
Financing receivable, allowance for credit loss | 0.0 | 0.0 |
Realized investment gains (losses) | 0.4 | 0.1 | $ (0.6)
Restricted investments | 81.5 | 81.3 |
Fixed Income Securities |  |  |
Net Investment Income [Line Items] |  |  |
Gross unrealized losses | 0.1 | 1.3 |
Gross unrealized losses, twelve months or more | $ 0.1 | $ 0.5 |

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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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