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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 222,788 $ 218,470
Less accumulated depreciation 127,070 125,144
Property and equipment - Net 95,718 93,326
Land and Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 12,811 13,190
Buildings and Improvements [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 59,458 59,505
Machinery and Equipment [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 139,225 138,533
Construction in Progress [Member]
   
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 11,294 $ 7,242