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Inventory (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Components of Inventory
Total inventory consists of the following:
 
June 30, 2017
 
December 31, 2016
 
(In thousands)
Inventory
 
 
 
Crude oil inventory
$
7,846

 
$
7,086

Equipment and materials
10,096

 
3,562

Total inventory
$
17,942

 
$
10,648

 
 
 
 
Long-term inventory
 
 
 
Linefill in third-party pipelines
$
8,762

 
$
—

Long-term inventory
$
8,762

 
$
—

 
 
 
 
Total
$
26,704

 
$
10,648