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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 247,201 $ 224,939
Less accumulated depreciation 142,097 132,974
Property and equipment - Net 105,104 91,965
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 12,584 12,260
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 72,662 71,711
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 158,078 137,599
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 3,877 $ 3,369