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Contract Balances - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Contract With Customer Asset And Liability [Line Items]          
Revenue, Remaining performance obligation $ 215,300,000   $ 215,300,000    
Prepaid Expenses and Other Current Assets          
Contract With Customer Asset And Liability [Line Items]          
Assets impairment charges 0 $ 0 0 $ 0  
Contract assets 900,000   900,000   $ 1,100,000
Current Deferred Revenue and Advanced Payments          
Contract With Customer Asset And Liability [Line Items]          
Revenue recognized from beginning deferred revenue $ 55,700,000 $ 53,900,000 $ 125,900,000 $ 123,200,000