Related Party Transactions - Resinsurance Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Ceded premiums earned	$ 118,958	$ 107,506
Reinsurance recoverable for paid and unpaid claims	$ 570,504		$ 581,359
Everest Reinsurance Co | Reinsurance agreement | Affiliated entity
Related Party Transaction [Line Items]
Ceded premiums earned		$ 19,600
Reinsurance recoverable for paid and unpaid claims			$ 177,500