Unpaid Loss and Loss Adjustment Expense - Unpaid Loss and Loss Adjustment Expenses (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Claims Development [Line Items]
Unpaid Loss and ALAE, net	$ 169.3
Reinsurance recoverable on Unpaid Loss and ALAE, net	133.8	$ 149.5	$ 120.2	$ 124.6
Unallocated LAE	0.0
Gross unpaid loss and ALAE	303.1	$ 298.1	$ 262.3	$ 256.2
Home and renters
Claims Development [Line Items]
Unpaid Loss and ALAE, net	105.4
Reinsurance recoverable on Unpaid Loss and ALAE, net	88.1
Gross unpaid loss and ALAE	193.5
Pet
Claims Development [Line Items]
Unpaid Loss and ALAE, net	10.8
Reinsurance recoverable on Unpaid Loss and ALAE, net	6.6
Gross unpaid loss and ALAE	17.4
Car
Claims Development [Line Items]
Unpaid Loss and ALAE, net	53.1
Reinsurance recoverable on Unpaid Loss and ALAE, net	39.1
Gross unpaid loss and ALAE	$ 92.2