Contract Balances - Additional Information (Detail1) $ in Millions	Mar. 31, 2019 USD ($)
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligation	$ 194.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-04-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period	12 months
Revenue, Remaining performance obligation	$ 190.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period
Revenue, Remaining performance obligation	$ 4.5