Prepaid Tires, Property, Equipment and Depreciation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Property, Plant and Equipment [Line Items]
Amortization Period of Tires			2 years
Tractors
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	$ 15		$ 15
Trailers
Property, Plant and Equipment [Line Items]
Property, Plant, and Equipment, Salvage Value	4		4
Communications and Utilities Expense
Property, Plant and Equipment [Line Items]
Depreciation	$ 300	$ 300	$ 500	$ 500