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v3.25.3

Subsequent Events (Additional Information) (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 21, 2025 Number | Oct. 31, 2025 USD ($) Number | Sep. 30, 2025 USD ($) Number | Sep. 30, 2024 USD ($) Number | Sep. 30, 2025 USD ($) Number | Sep. 30, 2024 USD ($) Number | Dec. 31, 2024 Number | Nov. 04, 2025 USD ($)
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Number Of Policies Assumed | Number |  |  | 13,711 | 0 | 40,082 | 64,600 | 136,000 |
Assumed Premiums Written |  |  | $ 33.1 | $ 0.0 | $ 138.0 | $ 207.6 |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Number Of Policies Assumed | Number | 175,000 | 60,100 |  |  |  |  |  |
Assumed Premiums Written |  | $ 165.4 |  |  |  |  |  |
Share Repurchase Program, Authorized, Amount |  |  |  |  |  |  |  | $ 100.0
Subsequent Event [Member] | Repurchase Program [Member] |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Share Repurchase Program, Authorized, Amount |  |  |  |  |  |  |  | $ 45.0

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Amount of written premiums assumed from other entities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477548/944-605-55-12 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479032/944-605-50-1 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
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