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Related Party Transactions
 12 Months Ended
Dec. 31, 2018
Related Party Transactions [Abstract]  
Related Party Transactions RELATED PARTY TRANSACTIONS
As described in Note 6, we own equity method investments in the general partner of NGL Energy and a 51% ownership interest in White Cliffs.
Transactions with NGL Energy and its subsidiaries primarily relate to marketing, leased storage and transportation services of crude oil, including buy/sell transactions. Transactions with White Cliffs primarily relate to leased storage, purchases and sales of crude oil, transportation fees for shipments on the White Cliffs Pipeline, and management fees.
In accordance with ASC 845-10-15, the buy/sell transactions with NGL Energy and White Cliffs were reported as revenue on a net basis in our consolidated statements of operations and comprehensive income (loss) because the purchases of inventory and subsequent sales of the inventory were with the same counterparty.
During the years ended December 31, 2018, 2017 and 2016, we generated the following transactions with related parties (in thousands):
 
Year Ended December 31,
 
2018
 
2017
 
2016
NGL Energy
 
 
 
 
 
   Revenues
$
18,168

 
$
45,918

 
$
61,639

   Purchases
$
681

 
$
29,695

 
$
57,739

 
 
 


 
 
White Cliffs
 
 


 
 
   Crude oil revenues
$
—

 
$
436

 
$
4,973

   Storage revenues
$
4,350

 
$
4,350

 
$
4,350

   Transportation fees
$
12,506

 
$
11,298

 
$
10,797

   Management fees
$
545

 
$
519

 
$
494

   Crude oil purchases
$
6,201

 
$
11,870

 
$
4,758