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ACQUISITIONS - Additional Information (Details) - USD ($) $ in Millions |  |  | 3 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Jan. 01, 2015 | Dec. 31, 2016
APC Logistics |  |  |
Business Acquisition [Line Items] |  |  |
Payments to acquire business | $ 229.4 |  |
Decrease to goodwill |  |  | $ 30.8
Freightquote |  |  |
Business Acquisition [Line Items] |  |  |
Payments to acquire business |  | $ 398.6 |
Freightquote | Trademarks |  |  |
Business Acquisition [Line Items] |  |  |
Indefinite-lived intangible assets acquired |  | $ 8.6 |

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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=73531572&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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