Property, Equipment, and Depreciation (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Amortization Period of Tires	2 years
Change in estimate financial impact, per share, net of tax	$ 0.01
Change in estimate financial impact, net of tax	1,400,000
Tractors
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	15,000
Trailers
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	4,000
Communications and Utilities Expense
Property, Plant and Equipment [Line Items]
Depreciation	$ 300,000	$ 200,000