CONTINGENCIES (Details)	9 Months Ended
	Sep. 30, 2015 USD ($) TankBarge Lawsuit Plaintiff Defendant PotentiallyResponsibleParty
Guarantor Obligations [Line Items]
Issued guaranties	$ 23,519,000
Maximum [Member]
Guarantor Obligations [Line Items]
Guarantor obligations, expiration period	4 years
Performance Bonds [Member]
Guarantor Obligations [Line Items]
Issued guaranties	$ 16,876,000
Standby Letters Of Credit [Member]
Guarantor Obligations [Line Items]
Issued guaranties	$ 6,643,000
Gulfco Marine Superfund Site [Member]
Guarantor Obligations [Line Items]
Number of other companies also named as Potentially Responsible Parties ("PRPs") | PotentiallyResponsibleParty	3
Number of companies named as Potentially Responsible Parties ("PRPs") | PotentiallyResponsibleParty	4
EPA incurred cleanup expense	$ 9,943,000
EPA oversight costs	$ 2,258,000
Number of defendants seeking contribution and indemnity under CERCLA | Defendant	21
Collision with M/S Summer Wind [Member]
Loss Contingencies [Line Items]
Number of vessels damaged in collision resulting in fuel oil discharge | TankBarge	1
Number of actions filed against the Company | Lawsuit	2
Number of crewmembers alleging damages | Plaintiff	2