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Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies We are a party to ordinary, routine litigation and administrative proceedings incidental to its business. In the opinion of management, our potential exposure under pending legal proceedings is adequately provided for in the accompanying consolidated financial statements. The total estimated purchase commitments for tractors, net of tractor sale commitments, and trailer equipment, to be delivered through the remainder of 2015 was $58.3 million at June 30, 2015. We have a purchase commitment with a related party of $11.6 million$12.0 million related to our exercise of a purchase option on the Rancho Cucamonga, CA terminal expected to be finalized by September 30, 2015.