Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Components Of Income Tax Expense Benefit [Line Items]
Income tax effective rate	48.20%	(9.50%)	(150.60%)	164.70%
Internal Revenue Service [Member]
Components Of Income Tax Expense Benefit [Line Items]
Income tax benefit			$ 0.3
Minimum [Member]
Components Of Income Tax Expense Benefit [Line Items]
Decrease in unrecognized tax benefits	$ 1.0		1.0
Maximum [Member]
Components Of Income Tax Expense Benefit [Line Items]
Decrease in unrecognized tax benefits	$ 1.5		$ 1.5