Other Liabilities and Accrued Expenses (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other Liabilities Disclosure [Abstract]
Accrued advertising costs	$ 16.7	$ 13.4
Lease liabilities	12.7	23.8
Employee compensation	11.9	13.2
Uncertain tax positions	11.9	9.7
Payable to carriers	10.4	6.2
Advance premium	6.4	3.1
Accrued professional fees	6.0	5.1
Premium taxes payable	5.9	8.1
Ceding commission payable	5.1	3.9
Reinsurance payable	2.9	2.8
Interest payable	2.0	1.3
Income taxes payable	0.4	1.5
Other payables	14.7	13.6
Total	$ 107.0	$ 105.7