| Acquisition (Details 1) | 12 Months Ended | 
|---|---|
| Dec. 31, 2012 | |
| Customer list [Member] | |
| Summary of amortization of useful life intangible assets | |
| Intangible assets subject to amortization, Estimated life in Years | 5 years | 
| Non-compete agreements [Member] | |
| Summary of amortization of useful life intangible assets | |
| Intangible assets subject to amortization, Estimated life in Years | 4 years | 
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- Details 
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available. 
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