Allowance for Expected Credit Losses - Reinsurance Recoverables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Allowance for Expected Credit Losses [Abstract]
Balance, beginning of period	$ 22,369	$ 22,496	$ 22,942	$ 21,103
Balance, beginning of period	43	54	51	61
Current period change for expected credit losses	0	(1)	(8)	(8)
Write-offs of uncollectible reinsurance recoverables	0	0	0	0
Balance, end of period	22,694	21,600	22,694	21,600
Balance, end of period	$ 43	$ 53	$ 43	$ 53