Insurance Contracts - Summary of Loss Reserve Roll-Forward, Net of Subrogation Recoverable and Reinsurance (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Beginning balance of net loss and loss expense reserves	$ 78,981	$ 40,857
Current Year Claims and Claims Adjustment Expense	10,325	18,230
Prior Year Claims and Claims Adjustment Expense	171	1,125
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims	10,496	19,355
Claim and loss expense payments, net of subrogation and reinsurance	(1,120)	(1,056)
Claim and loss expense (payments) recoveries, net of subrogation and reinsurance	(10,172)	(5,034)
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid	11,292	6,090
Liability for Unpaid Claims and Claims Adjustment Expense, Net	78,185	54,122	$ 78,981	$ 40,857
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	294,920	182,892	270,081	156,232
Policyholder Benefits and Claims Incurred, Ceded	(45,778)	(34,411)
Ceded Loss And Loss Expenses Paid Not Yet Recovered		15,088
Liability for Claim and Claim Adjustment Expenses Net of Subrogation recoverables	373,105	$ 237,014	349,062	$ 197,089
Liability for Claims and Claims Adjustment Expense	373,105		$ 349,062
Segment Reporting, Reconciling Item, Corporate Nonsegment | Other Insurance Contracts
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Liability for Claims and Claims Adjustment Expense	$ 34,724