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Other Financial Statement Information - Inventories - Net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 48,324 $ 43,041
Work-in-process 9,888 8,818
Finished Goods 43,328 42,163
Inventory, gross 101,540 94,022
Excess of current cost over LIFO cost (4,852) (4,474)
Noncurrent portion of inventory (3,956) (4,289)
Inventories - net $ 92,732 $ 85,259