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ACQUISITIONS - Summary of Identifiable Intangible Assets and Estimated Useful Lives (Details) - USD ($) $ in Thousands | Aug. 31, 2017 | Sep. 30, 2016 | Jan. 01, 2015
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Milgram & Company Ltd. | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Estimated Life (years) | 7 years |  |
Identifiable intangible assets | $ 14,004 |  |
APC Logistics |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets |  | $ 78,842 |
APC Logistics | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Estimated Life (years) |  | 7 years |
Identifiable intangible assets |  | $ 78,842 |
Freightquote |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets |  |  | $ 37,800
Freightquote | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Estimated Life (years) |  |  | 5 years
Identifiable intangible assets |  |  | $ 37,500
Freightquote | Noncompete agreements |  |  |
Business Acquisition [Line Items] |  |  |
Estimated Life (years) |  |  | 5 years
Identifiable intangible assets |  |  | $ 300

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=84160947&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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