GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill by Segment

The following table sets forth our goodwill, by segment, for the periods indicated:

	December 31, 2018		December 31, 2017
	(Thousands of dollars)
Natural Gas Gathering and Processing	$	153,404	$	153,404
Natural Gas Liquids	371,217		371,217
Natural Gas Pipelines	156,479		156,479
Total goodwill	$	681,100	$	681,100

Gross Carrying Amount and Accumulated Amortization of Intangible Assets

The following table reflects the gross carrying amount and accumulated amortization of intangible assets for the periods presented:

	December 31, 2018			December 31, 2017
	(Thousands of dollars)
Gross intangible assets	$	411,650		$	426,068
Accumulated amortization	(125,608		)	(113,708		)
Net intangible assets	$	286,042		$	312,360