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Other Financial Statement Information - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Nov. 02, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]        
Cost of inventories for certain materials using LIFO method   $ 25.1 $ 28.6  
Depreciation of property and equipment   11.8 10.8 $ 10.3
Capital leases of machinery, equipment and aircraft   $ 0.2 $ 0.2  
Name of plaintiff   Altalink, L.P.    
Complaint filling date   November 2016    
Estimated damages from defendants $ 56.0