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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 233,353 $ 237,355
Less accumulated depreciation 135,810 134,824
Property and equipment - Net 97,543 102,531
Land and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 13,323 14,173
Buildings and Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 74,112 75,587
Machinery and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 141,146 144,213
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 4,772 $ 3,382