Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2020
Goodwill [Line Items]
Goodwill impairment loss					$ 270.3
Amortization of intangible assets	$ 4.4	$ 4.5	$ 13.3	$ 14.3
Estimated Future Amortization Expense by Fiscal Year [Abstract]
Remainder 2023	4.4		4.4
2024	17.7		17.7
2025	17.7		17.7
2026	17.7		17.7
2027	17.7		17.7
2028	17.7		17.7
Off Road
Goodwill [Line Items]
Accumulated impairment loss	60.8		60.8
On Road
Goodwill [Line Items]
Accumulated impairment loss	$ 20.3		$ 20.3