Contract Assets, Contract Liabilities and Contract Costs and Net Sales - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Capitalized Contract Cost [Line Items]
Decrease in contract assets and liabilities	$ 42,200
Deferred commissions	30,319		$ 30,659
Amortization of deferred commissions	800	$ 1,100
Contract cost	14,200		$ 14,700
Amortization contract cost	1,300	$ 700
Aggregate amount of transaction price allocated to remaining performance obligations	$ 903,700
Percentage of transaction recognized	73.00%
Minimum [Member]
Capitalized Contract Cost [Line Items]
Period of duration for recognition of transaction	1 year
Maximum [Member]
Capitalized Contract Cost [Line Items]
Period of duration for recognition of transaction	3 years