Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Windfall benefit			$ 11.2	$ 4.6
Pretax Income	$ 4.1	$ 5.4		$ 35.7
Cumulative operating income loss period considered			3 years
Valuation allowance	11.2		$ 11.2
Unrecognized income tax benefits	$ 30.5		30.5			$ 30.3
Deferred tax assets					$ 7.0
Domestic Deferred Tax Assets [Member]
Income Loss From Operations Before Provision Benefit For Income Taxes [Line Items]
Valuation allowance			$ 11.2