Summary of Significant Accounting Policies - Rollforward of Credit Loss Allowance for Reinsurance Receivable (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Reinsurance Recoverable, Allowance for Credit Loss [Roll Forward]
Beginning balance, January 1, 2023	$ 82
Current-period provision for expected credit losses	15
Ending balance of the allowance for reinsurance receivable, December 31, 2023	$ 97