Loss and Loss Adjustment Expense Reserves - Incurred and Paid Claims Development to the Liability for Unpaid Claims (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of the Disclosure of Incurred and Paid Claims Development to the Liability for Unpaid claims and Claim Adjustment Expenses
Net outstanding liabilities	$ 579,829
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	149,441	$ 130,792	$ 112,623
Unallocated claims adjustment expenses	32,469
Total gross liability for unpaid claims and claim adjustment expenses	761,739	$ 671,669	$ 603,081	$ 549,598
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	272,273
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	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	15,587
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	114,534
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	136,002
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	4,581
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	5,563
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	42,207
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	82,216
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	2,517
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	48,431
Receivable from reinsurers related to unpaid loss and loss adjustment expenses	$ 5,239