Reinsurance Recoverable and Prepaid Reinsurance Premiums - Schedule of the Components of Reinsurance Receivables and Prepaid Reinsurance Premiums (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Effects of Reinsurance [Line Items]
Total ceded claim reserves recoverable	$ 581,925	$ 448,287
Other reinsurance settlements recoverable	350,731	505,599
Total reinsurance recoverable	932,656	953,886
Prepaid reinsurance premiums	978,149	900,524
Life insurance
Effects of Reinsurance [Line Items]
Total ceded claim reserves recoverable	4,131	4,733
Prepaid reinsurance premiums	72,749	74,815
Accident and health insurance
Effects of Reinsurance [Line Items]
Total ceded claim reserves recoverable	24,136	22,660
Prepaid reinsurance premiums	72,392	76,440
Property and liability insurance
Effects of Reinsurance [Line Items]
Total ceded claim reserves recoverable	553,658	420,894
Prepaid reinsurance premiums	$ 833,008	$ 749,269

Reinsurance Recoverables, Other Reinsurance Settlements Recoverable

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The unexpired portion of premiums ceded on policies in force as of the balance sheet date.

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Amount before valuation allowance recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.

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Amount, after valuation allowance, recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, policy benefits and policy reserves. Excludes premiums paid under reinsurance contracts.

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