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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 246,264 $ 224,939
Less accumulated depreciation 139,029 132,974
Property and equipment - Net 107,235 91,965
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 12,860 12,260
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 72,307 71,711
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 157,009 137,599
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 4,088 $ 3,369