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Schedule of Useful Life of Property and Equipment (Detail) | 12 Months Ended
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Dec. 31, 2013
Land Improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 5 years
Land Improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 20 years
Building and Improvements | Minimum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 5 years
Building and Improvements | Maximum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 50 years
Equipment And Software | Minimum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 3 years
Equipment And Software | Maximum |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 5 years
Office Furniture and Fixtures |
Property, Plant and Equipment [Line Items] |
Average number of useful life in years | 5 years

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration