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UNCONSOLIDATED AFFILIATES (Tables)
9 Months Ended
Sep. 30, 2019
Equity In Net Earnings From Investments  
Schedule of Equity Method Investments [Line Items]  
Schedule of Equity Method Investments [Table Text Block] The following table sets forth our equity in net earnings (loss) from investments for the periods indicated:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2019
 
2018
 
2019
 
2018
 
(Thousands of dollars)
Northern Border Pipeline
$
16,102

 
$
16,486

 
$
50,593

 
$
48,863

Overland Pass Pipeline
15,481

 
16,081

 
48,340

 
48,714

Roadrunner
7,421

 
6,303

 
19,836

 
16,803

Other
(1,428
)
 
443

 
(3,594
)
 
1,690

Equity in net earnings from investments
$
37,576

 
$
39,313

 
$
115,175

 
$
116,070



Unconsolidated Affiliates Financial Information  
Schedule of Equity Method Investments [Line Items]  
Schedule of Equity Method Investments [Table Text Block] The following table sets forth summarized combined financial information of our unconsolidated affiliates for the periods indicated:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2019
 
2018
 
2019
 
2018
 
(Thousands of dollars)
Income Statement
 
 
 
 
 
 
 
Revenues
$
151,210

 
$
160,962

 
$
471,461

 
$
471,641

Operating expenses
$
69,783

 
$
69,004

 
$
217,287

 
$
205,525

Net income
$
74,341

 
$
85,361

 
$
234,154

 
$
247,754

 
 
 
 
 
 
 
 
Distributions paid to us (a)
$
44,357

 
$
47,197

 
$
203,347

 
$
145,437


(a) - As determined by the Northern Border Pipeline Management Committee, we received an additional distribution of $50.0 million from Northern Border Pipeline during the nine months ended September 30, 2019.