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Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Dec. 31, 2024 loan
Liability for Catastrophe Claims [Line Items]
Incurred claims and claim adjustment expenses	$ 35,376	$ 17,062
Favorable prior year development	66,183	83,935
Reserve for losses and LAE, for prior years	$ 190,600	$ 135,000
Hurricane
Liability for Catastrophe Claims [Line Items]
Number of loans increased in default | loan			2,119
Wildfire | Reinsurance Risk In Force Affected | Reinsurer Concentration Risk
Liability for Catastrophe Claims [Line Items]
Concentration risk, percentage	0.10%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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