Reinsurance - Schedule of Direct, Assumed, and Ceded Reinsurance Amounts (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Premiums written:
Direct	$ 1,422,851	$ 1,315,911
Assumed	5,977	5,985
Ceded	(188,385)	(165,275)
Net	1,240,443	1,156,621
Premiums earned:
Direct	1,340,446	1,205,368
Assumed	6,151	6,191
Ceded	(187,840)	(160,615)
Net	1,158,757	1,050,944
Loss and loss expense incurred:
Direct	830,672	753,567
Assumed	5,498	5,981
Ceded	(89,845)	(55,256)
Net	$ 746,325	$ 704,292

Amount of earned premiums assumed from other entities.

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