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Commitments and Contingencies
9 Months Ended
Sep. 30, 2011
Commitments and Contingencies Disclosure [Abstract] 
Commitments and Contingencies Disclosure [Text Block]
Commitments and Contingencies

The Company is a party to ordinary, routine litigation and administrative proceedings incidental to its business. In the opinion of management, the Company’s potential exposure under pending legal proceedings is adequately provided for in the accompanying consolidated financial statements.  

The Company has entered into commitments to further execute management's plan to upgrade the Company's existing tractor and trailer fleets. Delivery of tractor equipment under the current program began in the third quarter of 2010 and is expected to be completed in the fourth quarter of 2011. In addition, the Company has purchase commitments outstanding for deliveries of new trailer equipment which is also expected to be completed in the fourth quarter of 2011. The total estimated net purchase commitments, net of estimated trade values on tractors, at September 30, 2011 is currently estimated at $17.0 million. Although the Company expects to continue to sell trailers throughout the remainder of 2011 to provide additional sources of cash flows for new trailers, there were no guaranteed commitments from third parties as of September 30, 2011 to buy trailers. Therefore, expected sale proceeds for trailer sales are not reflected as a reduction of the outstanding purchase commitment.