Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenue:
Trucking revenue	$ 79,793	$ 75,937
Strategic Capacity Solutions revenue	21,459	17,595
Intermodal revenue	3,635	4,291
Base revenue	104,887	97,823
Fuel surcharge revenue	27,140	25,850
Total revenue	132,027	123,673
Operating expenses and costs:
Salaries, wages and employee benefits	35,567	35,514
Fuel and fuel taxes	35,595	34,770
Purchased transportation	30,478	26,978
Depreciation and amortization	10,915	11,157
Operations and maintenance	11,508	10,931
Insurance and claims	5,389	4,882
Operating taxes and licenses	1,007	1,507
Communications and utilities	1,086	1,023
Gain on disposal of assets, net	(389)	(542)
Other	3,698	4,089
Total operating expenses and costs	134,854	130,309
Operating loss	(2,827)	(6,636)
Other expenses (income):
Interest expense	837	986
Other, net	(54)	(75)
Total other expenses, net	783	911
Loss before income taxes	(3,610)	(7,547)
Income tax benefit	(1,136)	(2,674)
Net loss	$ (2,474)	$ (4,873)
Net loss per share information:
Average shares outstanding (Basic) (in Shares)	10,305	10,300
Basic loss per share (in Dollars per share)	$ (0.24)	$ (0.47)
Average shares outstanding (Diluted) (in Shares)	10,305	10,300
Diluted loss per share (in Dollars per share)	$ (0.24)	$ (0.47)