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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2013
Subsequent Events [Abstract]
Subsequent events	13. Subsequent Events On July 25, 2013, the Company acquired all of the outstanding membership interests of Marisol International, LLC ("Marisol"), a leading non-asset based, supply chain-critical, provider of international logistics solutions based in Springfield, Missouri, for a total purchase price of approximately $66.0 million, plus an earn-out capped at $2.5 million. The acquisition was financed with the borrowings under the Company's credit facility discussed in Note 5. Due to the limited amount of time since the acquisition date, the initial purchase accounting is not yet complete for Marisol.