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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
6 Months Ended
Jun. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill by Segment
The following table sets forth our goodwill, by segment, for the periods indicated:
 
 
June 30,
2020
 
December 31,
2019
 
 
(Thousands of dollars)
Natural Gas Gathering and Processing
 
$

 
$
153,404

Natural Gas Liquids
 
371,217

 
371,217

Natural Gas Pipelines
 
156,375

 
156,375

Total goodwill
 
$
527,592

 
$
680,996