REVENUES (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues by major source	$ 741,688	$ 491,705
Revenue recognized	33,806
Marine Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	340,403	343,652
Marine Transportation [Member] \| Inland Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	252,355	237,238
Marine Transportation [Member] \| Coastal Transportation [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	88,048	106,414
Distribution and Services [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	401,285	148,053
Distribution and Services [Member] \| Oil and Gas [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	274,491	97,104
Distribution and Services [Member] \| Commercial and Industrial [Member]
Disaggregation of Revenue [Line Items]
Revenues by major source	$ 126,794	$ 50,949

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 32
-Paragraph 2A
-URI http://asc.fasb.org/extlink&oid=82859839&loc=SL82860478-203043

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130543-203045

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130539-203045

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration