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COMMITMENTS AND CONTINGENCIES Narrative: Commitments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Major Operating Leases      
Rent expense for operating leases $ 39.7 $ 46.1 $ 52.9
St Eustatius Tugs and Barges [Member]      
Major Operating Leases      
Description of Lessee Leasing Arrangements for Operating Leases a ten-year lease for tugs and barges utilized at our St. Eustatius facility for bunker fuel sales, with two five-year renewal options    
Land Leases [Member]      
Major Operating Leases      
Description of Lessee Leasing Arrangements for Operating Leases land leases at various terminal facilities, with original terms ranging from 10 to 100 years.