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Other Financial Statement Information - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Nov. 02, 2016
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]        
Cost of inventories for certain materials using LIFO method   $ 32.0 $ 32.0  
Inventory reserves for slow-moving and obsolete inventory   9.9 8.9  
Depreciation of property and equipment   12.2 12.3 $ 12.1
Financing leases of machinery, equipment and aircraft   0.3 $ 0.3  
Accrued estimate for losses   $ 2.2    
Name of plaintiff   Altalink, L.P.    
Complaint filling date   November 2016    
Estimated damages from defendants $ 56.0