INVENTORIES AND SUPPLIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Inventory Disclosure [Abstract]
Oil and oil products	$ 59,639	$ 76,791
Supplies and drums	64,471	69,521
Solvent and solutions	10,100	9,398
Other	17,886	20,768
Total inventories and supplies	$ 152,096	$ 176,478