Summary of Significant Accounting Policies (Schedule of Estimated Useful Life) (Details) (USD $)
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12 Months Ended |
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Dec. 31, 2012
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|
Tractors [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Estimated Useful Lives | 80 months |
Salvage Value Percentage | 0.00% |
Trailers [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Estimated Useful Lives | 12 years |
Salvage Value | 1,000 |
Building And Improvements [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Estimated Useful Lives | 30 years |
Salvage Value Percentage | 0.00% |
Service And Other Equipment [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Salvage Value Percentage | 0.00% |
Minimum [Member] | Service And Other Equipment [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Estimated Useful Lives | 3 years |
Maximum [Member] | Service And Other Equipment [Member]
|
|
Property, Plant and Equipment [Line Items] | |
Estimated Useful Lives | 10 years |