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Other Financial Statement Information - Property, Plant and Equipment - Net (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 239,216 $ 231,229
Less accumulated depreciation 134,070 130,768
Property and equipment - Net 105,146 100,461
Land and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 13,036 12,141
Buildings and Improvements [Member]
    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 72,659 69,963
Machinery and Equipment [Member]
    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross 145,098 141,940
Construction in Progress [Member]
    
Property, Plant and Equipment [Line Items]    
Property and equipment - Gross $ 8,423 $ 7,185