SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013
Subsequent Event [Line Items]
Business Acquisition, Name of Acquired Entity	we entered into an agreement to purchase the assets and operations of two Costa Rican-based companies: (1) Union Pak de Costa Rica, S.A., a small package delivery company, and (2) SEISA Brokerage, a customs brokerage company.
TeamstersTentativeAgreement		we reached a tentative agreement with the Teamsters
NumberOFContractsUnderTentativeAgreement		2
Subsequent Event, Term of Contract		5 years
AdditionalSupplementsOutForVote			5
RemainingSupplementsToBeSentOutForVote			11