Basis of Presentation and Summary of Significant Accounting Policies - Reinsurance (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Reinsurance
Amount of allowance for uncollectible amounts on paid recoverables	$ 17,000	$ 17,000
Reinsurance balances recoverable on unpaid losses and settlement expenses, allowances for uncollectible amounts	11,479	$ 11,107
Financing receivable, allowance for credit Loss, write-off	$ 0
Common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Maximum
Reinsurance
Financing receivable, allowance for credit loss, recovery	$ 1,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of valuation allowance for reinsurance recoverables on paid losses.

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