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Unpaid Loss and Loss Adjustment Expense - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Favorable development on net loss and LAE reserves |  | $ (30.4) | $ (10.0) | $ (5.8)
Current accident year incurred loss and LAE |  | 377.4 | 287.0 | 286.2
Hurricane Helene |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Current accident year incurred loss and LAE |  |  | 3.5 |
Hurricane Beryl |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Current accident year incurred loss and LAE |  |  | $ 4.0 |
Winter Storm Elliot |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Current accident year incurred loss and LAE |  |  |  | 10.4
Texas Hail Storm |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Current accident year incurred loss and LAE |  |  |  | $ 4.2
California Wildfires |  |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |  |
Current accident year incurred loss and LAE |  | $ 19.6 |  |
Liability for unpaid claims and claims adjustment expense, period increase (decrease) | $ 4.2 |  |  |

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- Definition Amount, after effects of reinsurance, of increase (decrease) in the liability for unpaid claims and claims adjustment expense. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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- Definition Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-3 + Details
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