Reserve for Loss and Loss Adjustment Expenses - Schedule of Development Experienced (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Segment Reporting [Line Items]
Total PPD for Legacy Reinsurance Segment	$ 1,931	$ (7,788)	$ 2,208	$ (7,788)
Diversified Reinsurance legacy business
Segment Reporting [Line Items]
Total PPD for Legacy Reinsurance Segment	(359)	125	(633)	125
AmTrust Reinsurance legacy business
Segment Reporting [Line Items]
Total PPD for Legacy Reinsurance Segment	$ 2,290	$ (7,913)	$ 2,841	$ (7,913)

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.

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+ Details