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Inventories
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
The major components of inventories were as follows:
 
March 31,
2017
 
December 31,
2016
Petroleum products
$
2,621

 
$
11,550

Crude oil
75,488

 
73,133

Caustic soda
5,358

 
4,593

NaHS
9,109

 
9,304

Other
2

 
7

Total
$
92,578

 
$
98,587


Inventories are valued at the lower of cost or market. The market value of inventories were below recorded costs by approximately $0.2 million as of March 31, 2017 without similar adjustments required as of December 31, 2016; therefore we reduced the value of inventory in our Condensed Consolidated Financial Statements for this difference in 2017.