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Other Financial Statement Information - Inventories - Net (Detail) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Finished products $ 37,544 $ 37,812
Work-in-process 7,121 6,902
Raw materials 35,162 34,854
Inventory, gross 79,827 79,568
Excess of current cost over LIFO cost (3,893) (3,538)
Noncurrent portion of inventory (5,632) (6,118)
Inventories - net $ 70,302 $ 69,912