AMORTIZING INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

6. AMORTIZING INTANGIBLE ASSETS

Details regarding our intangible assets, all of which are subject to amortization, follow:

	March 31, 2019
	Gross carrying amount		Accumulated amortization			Net
	(In thousands)
Favorable gas gathering contracts	$	24,195	$	(14,294	)	$	9,901
Contract intangibles		278,448		(150,180	)		128,268
Rights-of-way		158,862		(38,320	)		120,542
Total intangible assets	$	461,505	$	(202,794	)	$	258,711

	December 31, 2018
	Gross carrying amount		Accumulated amortization			Net
	(In thousands)
Favorable gas gathering contracts	$	24,195	$	(13,905	)	$	10,290
Contract intangibles		278,448		(143,962	)		134,486
Rights-of-way		166,209		(37,569	)		128,640
Total intangible assets	$	468,852	$	(195,436	)	$	273,416

In March 2019, certain events, facts and circumstances occurred which indicated that certain long-lived assets relating to the Barnett Shale reporting segment could be impaired (see Note 5). In connection with this evaluation, we evaluated the related intangible assets associated therewith for impairment consisting of rights-of-way intangible assets. We concluded the rights-of-way intangible assets were also impaired and, as a result, we recorded an impairment charge of $0.5 million.

We recognized amortization expense in other revenues as follows:

	Three months ended March 31,
	2019			2018
	(In thousands)
Amortization expense – favorable gas gathering contracts	$	(389	)	$	(389	)

We recognized amortization expense in costs and expenses as follows:

	Three months ended March 31,
	2019		2018
	(In thousands)
Amortization expense – contract intangibles	$	6,397	$	6,535
Amortization expense – rights-of-way		1,547		1,585

The estimated aggregate annual amortization expected to be recognized for the remainder of 2019 and each of the four succeeding fiscal years follows.

	Intangible assets
	(In thousands)
2019	$	24,063
2020		32,020
2021		28,328
2022		25,261
2023		25,207