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Inventories
9 Months Ended
Sep. 30, 2012
Inventory Disclosure [Abstract]  
Inventories
3. Inventories
The major components of inventories were as follows:
 
September 30,
2012
 
December 31,
2011
Petroleum products
$
41,076

 
$
70,769

Crude oil
12,014

 
11,701

Caustic soda
6,829

 
11,312

NaHS
7,376

 
7,337

Other
3

 
5

Total
$
67,298

 
$
101,124


Inventories are valued at the lower of cost or market. At September 30, 2012 and December 31, 2011, market values of our inventories exceeded recorded costs.