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Reinsurance (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023
Reinsurance Retention Policy |  |  |
Document Period End Date | Mar. 31, 2024 |  |
Ceded Premiums Earned | $ 100,092 |  | $ 57,152
Interboro Insurance | Catastrophe Excess of Loss |  |  |
Reinsurance Retention Policy |  |  |
Reinsurance, Excess Retention, Amount Reinsured, Per Policy | 82,000 |  |
Event Retention Level | 3,000 |  |
American Coastal Insurance Company | Catastrophe Excess of Loss |  |  |
Reinsurance Retention Policy |  |  |
Reinsurance, Excess Retention, Amount Reinsured, Per Policy | 1,300,000 |  |
Event Retention Level | 10,000 |  |
Reinsurance, Excess Retention, Amount Reinsured, Per Event | 1,100,000 |  |
American Coastal Insurance Company | All Other Perilds Catastrophe Excess of Loss |  |  |
Reinsurance Retention Policy |  |  |
Reinsurance, Excess Retention, Amount Reinsured, Per Policy | 172,000 |  |
UPC Re | Catastrophe Excess of Loss |  |  |
Reinsurance Retention Policy |  |  |
Event Retention Level | 2,250 |  |
Reinsurance Contract [Axis]: XOL Commutation |  |  |
Reinsurance Retention Policy |  |  |
Ceded Premiums Earned | $ 9,400 | $ 6,300 |

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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. + References No definition available. + Details
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- Definition Amount of earned premiums ceded to other entities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 235 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17(Column C)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477965/944-235-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479032/944-605-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478832/944-605-45-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479032/944-605-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 605 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479032/944-605-50-1 + Details
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- Definition Amount per event of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479838/944-20-50-3 + Details
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- Definition Amount per policy of risk ceded to reinsurer in excess of risk undertaken originally by insurer that is not ceded to reinsurer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479838/944-20-50-3 + Details
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