Loss and Loss Adjustment Expense Reserves - Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Prior years	$ 53,673	$ 54,844	$ 42,049
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	443,840
Reinsurance recoverable on unpaid claims	90,667	106,311	122,372
Unallocated claims adjustment expenses	36,144
Liability for Claims and Claims Adjustment Expense, Total	570,651	$ 567,581	$ 610,566	$ 584,719
Private Passenger Automobile Liability
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	183,552
Reinsurance recoverable on unpaid claims	120
Private Passenger Automobile Physical Damage
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	(2,651)
Reinsurance recoverable on unpaid claims	0
Commercial Automobile Liability
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	98,238
Reinsurance recoverable on unpaid claims	87,221
Commercial Automobile Physical Damage
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	1,485
Reinsurance recoverable on unpaid claims	2,398
Homeowners Liability
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	43,282
Homeowners Property Damage
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	45,233
Other short-Duration Insurance Lines
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	74,701
Reinsurance recoverable on unpaid claims	$ 928