Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue:
Trucking revenue	$ 81,434	$ 71,846	$ 161,227	$ 147,782
Strategic Capacity Solutions revenue	30,028	31,674	55,123	53,560
Base revenue	111,462	103,520	216,350	201,342
Fuel surcharge revenue	28,276	26,049	55,416	51,900
Total revenue	139,738	129,569	271,766	253,242
Operating expenses and costs:
Purchased transportation	35,730	35,275	66,208	62,253
Salaries, wages and employee benefits	34,663	34,717	70,230	70,230
Fuel and fuel taxes	33,017	30,567	68,613	65,336
Operations and maintenance	13,649	10,579	25,157	21,510
Depreciation and amortization	10,852	11,178	21,767	22,335
Insurance and claims	7,024	5,381	12,413	10,264
Operating taxes and licenses	1,696	1,389	2,704	2,896
Communications and utilities	984	1,057	2,069	2,079
Gain on disposal of assets, net	(429)	(724)	(819)	(1,266)
Other	3,497	4,479	7,195	8,570
Total operating expenses and costs	140,683	133,898	275,537	264,207
Operating loss	(945)	(4,329)	(3,771)	(10,965)
Other expenses (income):
Interest expense	947	1,023	1,784	2,009
Other, net	(46)	(48)	(99)	(123)
Total other expenses, net	901	975	1,685	1,886
Loss before income taxes	(1,846)	(5,304)	(5,456)	(12,851)
Income tax benefit	(448)	(1,818)	(1,584)	(4,492)
Net loss and Comprehensive loss	$ (1,398)	$ (3,486)	$ (3,872)	$ (8,359)
Net loss per share information:
Average shares outstanding (Basic) (in Shares)	10,293	10,304	10,299	10,302
Basic loss per share (in Dollars per share)	$ (0.14)	$ (0.34)	$ (0.38)	$ (0.81)
Average shares outstanding (Diluted) (in Shares)	10,293	10,304	10,299	10,302
Diluted loss per share (in Dollars per share)	$ (0.14)	$ (0.34)	$ (0.38)	$ (0.81)