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Property And Equipment at Cost Depreciation and Amortization Estimated Useful Lives (Detail) | 12 Months Ended
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Dec. 31, 2012
Land improvements | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 8 years
Land improvements | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 12 years
Buildings and improvements | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 8 years
Buildings and improvements | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 30 years
Machinery, equipment and other | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 3 years
Machinery, equipment and other | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 12 years
Office and transportation equipment | Minimum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 3 years
Office and transportation equipment | Maximum |
Property Plant and Equipment Estimated Useful Lives [Line Items] |
Property, Plant and Equipment, Useful Life | 10 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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