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Description of Business and Summary of Significant Accounting Policies (Details 4) | 12 Months Ended
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Dec. 31, 2013
Construction equipment | Minimum |
Property, Plant and Equipment |
Estimated useful lives | 5 years
Construction equipment | Maximum |
Property, Plant and Equipment |
Estimated useful lives | 20 years
Remaining depreciable property | Minimum |
Property, Plant and Equipment |
Estimated useful lives | 3 years
Remaining depreciable property | Maximum |
Property, Plant and Equipment |
Estimated useful lives | 40 years

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- Details
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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