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Reinsurance - Current Ratings from Rating Agencies and Unsecured Net Amounts Due from Reinsurers Whose Aggregate Balance Exceeded 3% of Stockholders' Equity (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers	$ 44,232	$ 114,107
Florida Hurricane Catastrophe Fund “FHCF”
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers	29,125	91,275
Aeolus Re LTD
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers	15,107	0
Various Lloyd’s of London Syndicates | AM Best, A Rating | Standard & Poor's, AA- Rating
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers	$ 0	$ 22,832
Customers with Greater than 3% of Equity | Stockholders' Equity, Total | Amounts Due From Reinsurers
Ceded Credit Risk [Line Items]
Unsecured amounts due from reinsurers exceeding a fixed percentage of stockholders equity	3.00%

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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-Topic 944
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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