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SUBSEQUENT EVENT (Details) - Subsequent Event [Member]	Apr. 15, 2016 USD ($) TankBarge Towboat bbl
Subsequent Event [Line Items]
Purchase price | $	$ 88,000,000
Number of inland barrel tank barges | TankBarge	27
Barrel tank barges | bbl	30,000
Number of inland towboats | Towboat	13
Number of inland barrel tank barges under construction | TankBarge	1
Number of inland towboats under construction | Towboat	1

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- Definition

Refers to the number of inland barrel tank barges.

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Refers to the number of inland towboats.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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