Reinsurance - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reinsurance [Line Items]
Aggregate recovery	$ 31,725	$ 24,160
Reinsurance retention policy, reinsured risk, percentage	22.30%	37.60%
Written premiums increased		45.90%
Increase in premiums earned			112.20%
Casualty Excess and Property Excess | Property and casualty business
Reinsurance [Line Items]
Reinsurance retention policy, reinsured risk, percentage			7.02%
Casualty Excess and Property Excess | Property and casualty business | Minimum
Reinsurance [Line Items]
Retention			$ 58,500
Casualty Excess and Property Excess | Property and casualty business | Maximum
Reinsurance [Line Items]
Aggregate recovery			30,000
Retention			$ 71,500
Percent of program placed			65.00%