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Segment Information - Schedule of Reconciliation to Consolidated Total Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Segment Reporting, Asset Reconciling Item [Line Items]
Reinsurance balances receivable, net	$ 10,397	$ 0
Reinsurance recoverable on unpaid losses	520,520	0
Loan to related party	107,490	0
Intangible assets	11,438	0
Restricted cash and cash equivalents and investments	211,449
Funds withheld receivable	12,085	0
Other assets	26,784	1,224
Assets held for sale	19,823	0
Total Assets	$ 1,159,411	5,510
Minimum
Segment Reporting, Asset Reconciling Item [Line Items]
Policy inception, grace period	30 days
Maximum
Segment Reporting, Asset Reconciling Item [Line Items]
Policy inception, grace period	60 days
Operating Segments
Segment Reporting, Asset Reconciling Item [Line Items]
Reinsurance balances receivable, net	$ 10,397
Reinsurance recoverable on unpaid losses	520,520
Deferred commission and other acquisition expenses	0
Loan to related party	107,490
Intangible assets	11,438
Restricted cash and cash equivalents and investments	213,908	4,286
Funds withheld receivable	12,085
Other assets	1,706	968
Total Assets	877,544	5,254
Operating Segments | Legacy Reinsurance
Segment Reporting, Asset Reconciling Item [Line Items]
Reinsurance balances receivable, net	10,397
Reinsurance recoverable on unpaid losses	520,520
Deferred commission and other acquisition expenses	0
Loan to related party	107,490
Intangible assets	11,438
Restricted cash and cash equivalents and investments	211,378	0
Funds withheld receivable	12,085
Other assets	383	0
Total Assets	873,691	0
Operating Segments | Program Services
Segment Reporting, Asset Reconciling Item [Line Items]
Reinsurance balances receivable, net	0
Reinsurance recoverable on unpaid losses	0
Deferred commission and other acquisition expenses	0
Loan to related party	0
Intangible assets	0
Restricted cash and cash equivalents and investments	2,530	4,286
Funds withheld receivable	0
Other assets	1,323	968
Total Assets	3,853	5,254
Corporate assets
Segment Reporting, Asset Reconciling Item [Line Items]
Assets held for sale	19,823
Total Assets	$ 262,044	$ 256

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