Other Accrued Liabilities - Summary of Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Other Liabilities Disclosure [Abstract]
Self insurance	$ 7.5	$ 4.0	$ 4.1
Sales incentive programs	6.4	6.8	5.4
Short-term environmental	1.1	1.1	1.1
Other accruals	6.5	3.8	4.6
Other accrued liabilities	$ 21.5	$ 15.7	$ 15.2