Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2013
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has an advisory agreement with HCI Equity Management L.P. (“HCI”) to pay a transaction fee for each acquisition and an annual advisory fee of $0.1 million. The Company paid an aggregate of $0.2 million and $0.9 million to HCI for services performed in conjunction with acquisitions and debt financing during 2013 and 2012, respectively. As part of the 2007 acquisition of Big Rock Transportation, Inc., Midwest Carriers, Inc., Sargent Trucking, Inc., B&J Transportation, Inc., and Smith Truck Brokers, Inc. (collectively, Sargent), the Company was required to pay an earnout to the former Sargent owners. The Company’s obligation to make further contingent payments to the former Sargent owners terminated as of December 31, 2009. The Company paid $0.8 million during 2012 related to the amounts earned in 2006 and 2007. As part of the acquisition of Bullet, certain existing stockholders and their affiliates received eight-year warrants exercisable for an aggregate of 1,388,620 shares of the Company's Class A common stock. Certain stockholders exercised 559,930 of these warrants during 2013. No warrants were exercised by affiliated parties during 2012. As of December 31, 2013, 274,362 were still outstanding.

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

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