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Inventories (Notes)
3 Months Ended
Mar. 31, 2016
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
6. Inventories
Inventories were as follows:
 
March 31,
2016
 
December 31,
2015
 
(In thousands)
Lubricants
$
12,319

 
$
14,959

Refined products
157

 
241

Inventories
$
12,476

 
$
15,200