Other Financial Statement Information - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 02, 2016 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Inventory Disclosure [Abstract] | ||||
| Cost of inventories for certain materials using LIFO method | $ 28.6 | $ 26.8 | ||
| Depreciation of property and equipment | 10.8 | 10.3 | $ 11.3 | |
| Capital leases of machinery, equipment and aircraft | $ 0.2 | $ 0.3 | ||
| Name of plaintiff | Altalink, L.P. | |||
| Complaint filling date | November 2016 | |||
| Estimated damages from defendants | $ 56.0 | |||