Reinsurance - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Reinsurance Retention Policy
Percentage of singe occurrence exceeding protection purchased			0.50%
Ceded Premiums Earned	$ 73,022,000	$ 81,939,000	$ 217,577,000	$ 262,785,000
Catastrophe Excess of Loss
Reinsurance Retention Policy
Insured long term debt project demand decrease			$ 78
Program provides sufficient coverage period			1-in-100-year
Percentage of loss adjustment expense			10.00%
Program provides sufficient coverage return period			1-in-286-year
Program provides sufficient coverage probability rate			0.40%
Reinsurance, excess retention, amount reinsured, per policy			$ 1,918,000,000
Retension loss events	100,000,000		100,000,000
Third event retention level	2,000,000		2,000,000
First event retention level	23,500,000		23,500,000
Second event retention level	25,000,000		25,000,000
Reinsurance, excess retention, amount reinsured, per event			$ 1,680,000,000
All Other Perilds Catastrophe Excess of Loss
Reinsurance Retention Policy
Program provides sufficient coverage return period			1-in-227-year
Reinsurance, excess retention, amount reinsured, per policy			$ 170,400,000
Reinsurance, excess retention level per event	95,600,000		95,600,000
Catastrophe Aggregate Excess of Loss
Reinsurance Retention Policy
Reinsurance, excess retention, amount reinsured, per policy			40,000,000
Event occurrence limit	$ 20,000,000		20,000,000
Reinsurance, aggregate retention			$ 40,000,000
Quota Share Agreement
Reinsurance Retention Policy
Cession Rate			45.00%