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Inventories (Tables)
 12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
Inventories at December 31, 2017 and 2016 consist of the following (in thousands):
 
Titled Inventory
 
Supply and Offtake Agreements (1)
 
Total
December 31, 2017
 
 
 
 
 
Crude oil and feedstocks
$
93,970

 
$
56,014

 
$
149,984

Refined products and blendstock
63,505

 
108,917

 
172,422

Warehouse stock and other
22,951

 
—

 
22,951

Total
$
180,426

 
$
164,931

 
$
345,357

December 31, 2016
 
 
 
 
 
Crude oil and feedstocks
$
11,620

 
$
49,682

 
$
61,302

Refined products and blendstock
38,916

 
77,677

 
116,593

Warehouse stock and other
20,431

 
—

 
20,431

Total
$
70,967

 
$
127,359

 
$
198,326

_________________________________________________________
(1)
Please read Note 10—Inventory Financing Agreements for further information.