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INVENTORIES AND SUPPLIES (Tables)
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories and supplies consisted of the following (in thousands):
 
March 31,
 
December 31,
 
2013
 
2012
Oil and oil products
$
59,294

 
$
77,735

Supplies and drums
64,102

 
63,540

Solvent and solutions
11,441

 
9,398

Other
9,639

 
20,768

Total inventories and supplies
$
144,476

 
$
171,441