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Contract Balances - Additional Information (Detail1)
$ in Millions
Sep. 30, 2019
USD ($)
Contract With Customer Asset And Liability [Line Items]  
Revenue, Remaining performance obligation $ 164.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-10-01  
Contract With Customer Asset And Liability [Line Items]  
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period 12 months
Revenue, Remaining performance obligation $ 160.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-10-01  
Contract With Customer Asset And Liability [Line Items]  
Revenue, Remaining performance obligations, Expected timing of satisfaction, Period
Revenue, Remaining performance obligation $ 4.5