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Inventories
3 Months Ended
Mar. 31, 2013
Inventory Disclosure [Abstract]  
Inventories
Inventories

Components of inventories at March 31, 2013 and December 31, 2012 were as follows: 
 
March 31, 2013
 
December 31, 2012
Natural gas liquids
$
7,431

 
$
33,610

Sulfur
22,168

 
14,892

Sulfur based products
13,159

 
17,824

Lubricants
25,281

 
27,366

Other
3,159

 
2,295

 
$
71,198

 
$
95,987