Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Income Taxes [Line Items]
Income tax expense (benefit)	$ 8.2	$ 5.7
Unrecognized tax benefits	1.6		$ 1.5
Accrued Interest included in unrecognized tax benefits	0.2		$ 0.2
Unrecognized tax benefits if recognized would impact on effective income tax rate	$ 1.6
Income tax examination description	With a few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years before 2015.
Stock-Based Compensation [Member]
Income Taxes [Line Items]
Income tax expense (benefit)	$ 1.3
Base Erosion and Anti-Abuse Tax ("BEAT") [Member]
Income Taxes [Line Items]
Income tax expense (benefit)	1.2
State [Member]
Income Taxes [Line Items]
Valuation allowance	12.0
Income tax expense (benefit)	2.1
US and Foreign Operations [Member]
Income Taxes [Line Items]
Income tax expense (benefit)	$ 3.6