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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
gal
Dec. 31, 2013
gal
INVENTORIES    
Liquid petroleum products $ 396,327 $ 290,718
Materials and supplies 20,788 21,417
Total inventories $ 417,115 $ 312,135
Refined petroleum products (in gallons) 141,900,000 102,100,000
Percentage of hedged refined petroleum products inventory 85.00% 81.00%