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Contract Balances - Additional Information (Detail1) $ in Millions	Jun. 30, 2019 USD ($)
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligation	$ 181.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period	12 months
Revenue, Remaining performance obligation	$ 176.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-07-01
Contract With Customer Asset And Liability [Line Items]
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period
Revenue, Remaining performance obligation	$ 4.2