Provision for Unpaid Losses and Loss Adjustment Expenses - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022	Dec. 31, 2020
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Provision for unpaid losses and loss adjustment expenses	$ 111,741	$ 74,869		$ 54,988
Current accident year	186,478	132,481
Reinsurance recoverables	843	0		$ 0
Current accident year	109,555	$ 76,559
U S Auto
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Current accident year	6,500
Hurricane Ian
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense [Line Items]
Provision for unpaid losses and loss adjustment expenses			$ 15,300
Allowance for credit loss, recovery	5,300
Current accident year	10,000
Reinsurance recoverables	1,400
Reinsurance premiums	$ 700