Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract liability revenue recognized	$ 6.9
Impairment losses on Contract Assets	0.0	$ 0.0
Transaction price allocated to uncompleted contracts	$ 91.3
Expected time of revenue recognition	over the next 18 months.
Performance obligation, description of timing	one year or less.