Annual report pursuant to Section 13 and 15(d)

Inventories - Narrative (Details)

v3.10.0.1
Inventories - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Reserve for inventory valuation $ 20.8 $ 18.0
Percentage of reserve for inventory valuation 12.00% 10.70%