REVENUE (Tables)

6 Months Ended

Jun. 30, 2018

Revenue From Contract With Customer [Abstract]

Schedule of Estimated Revenue Expected to be Recognized and MVC Shortfall Payments

The following table presents estimated revenue expected to be recognized during the remainder of 2018 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated MVC shortfall payments.

We applied the practical expedient in paragraph 606-10-50-14 of Topic 606 for certain arrangements that we consider optional purchases (i.e., there is no enforceable obligation for the customer to make purchases) and those amounts are excluded from the table.

	2018		2019		2020		2021		2022		Thereafter
	(In thousands)
Gathering services and related fees	$	97,523	$	133,743	$	122,429	$	102,777	$	83,648	$	174,227

Schedule of Disaggregated Revenue by Geographic Area and Major Products and Services Reportable Segments

Revenue by Category.  In the following table, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 4.

	Reportable Segments
	Three months ended June 30, 2018
	Utica Shale		Williston Basin		Piceance / DJ Basins		Barnett Shale		Marcellus Shale		Total reportable segments		All other segments			Total
	(In thousands)
Major products/services     lines
Gathering services and     related fees	$	10,422	$	23,106	$	36,170	$	14,080	$	8,050	$	91,828	$	(2,243	)	$	89,585
Natural gas, NGLs and     condensate sales		—		7,350		4,675		381		—		12,406		19,485			31,891
Other revenues		—		2,960		2,147		1,694		—		6,801		(94	)		6,707
Total	$	10,422	$	33,416	$	42,992	$	16,155	$	8,050	$	111,035	$	17,148		$	128,183

	Reportable Segments
	Six months ended June 30, 2018
	Utica Shale		Williston Basin		Piceance / DJ Basins		Barnett Shale		Marcellus Shale		Total reportable segments		All other segments			Total
	(In thousands)
Major products/services     lines
Gathering services and     related fees	$	20,463	$	40,772	$	71,464	$	27,717	$	15,875	$	176,291	$	(2,345	)	$	173,946
Natural gas, NGLs and     condensate sales		—		15,196		9,000		926		—		25,122		32,886			58,008
Other revenues		—		5,872		4,115		3,682		—		13,669		(120	)		13,549
Total	$	20,463	$	61,840	$	84,579	$	32,325	$	15,875	$	215,082	$	30,421		$	245,503

Schedule of Information about Contract Assets from Contracts with Customers

The following table provides information about contract assets from contracts with customers:

	June 30, 2018
	(In thousands)
Contract assets, December 31, 2017	$	—
Net impact of Topic 606 day 1 adoption		3,514
Additions		11,523
Transfers out		(5,704	)
Contract assets, June 30, 2018	$	9,333
Current		9,333
Noncurrent		—
Contract assets, June 30, 2018	$	9,333