Reinsurance - Effect on Net Premiums Written and Earned (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Net premiums written:
Direct	$ 279,916	$ 280,796	$ 831,706	$ 828,062
Assumed	62,513	0	284,353	0
Ceded	(39,555)	(38,968)	(111,231)	(106,475)
Net premiums written	302,874	241,828	1,004,828	721,587
Net premiums earned:
Direct	283,013	285,300	843,577	847,464
Assumed	47,214	0	95,183	0
Ceded	(39,555)	(38,968)	(111,231)	(106,475)
Net premiums earned	$ 290,672	$ 246,332	$ 827,529	$ 740,989

Amount of earned premiums assumed from other entities.

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