REVENUE (Tables)

3 Months Ended

Mar. 31, 2019

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 2019 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.

	2019		2020		2021		2022		2023		Thereafter
	(In thousands)
Gathering services and related fees	$	88,169	$	120,941	$	100,117	$	83,673	$	70,971	$	113,679

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. Ohio Gathering is excluded from the tables below due to equity method accounting. For more detailed information about reportable segments, see Note 4.

	Reportable Segments
	Three months ended March 31, 2019
	Utica Shale		Williston Basin		DJ Basin		Permian Basin		Piceance Basin		Barnett Shale		Marcellus Shale		Total reportable segments		All other segments			Total
	(In thousands)
Major products /     services lines
Gathering services     and related fees	$	7,495	$	25,706	$	3,724	$	366	$	31,840	$	13,025	$	6,197	$	88,353	$	(1,389	)	$	86,964
Natural gas, NGLs     and condensate     sales		—		5,585		85		4,221		2,302		604		—		12,797		25,131			37,928
Other revenues		—		2,908		1,007		32		1,138		1,656		—		6,741		(225	)		6,516
Total	$	7,495	$	34,199	$	4,816	$	4,619	$	35,280	$	15,285	$	6,197	$	107,891	$	23,517		$	131,408

	Reportable Segments
	Three months ended March 31, 2018
	Utica Shale		Williston Basin		DJ Basin		Piceance Basin		Barnett Shale		Marcellus Shale		Total reportable segments		All other segments			Total
	(In thousands)
Major products /     services lines
Gathering services     and related fees	$	10,041	$	17,666	$	2,179	$	33,115	$	13,637	$	7,825	$	84,463	$	(102	)	$	84,361
Natural gas, NGLs     and condensate     sales		—		7,846		80		4,245		545		—		12,716		13,401			26,117
Other revenues		—		2,912		757		1,211		1,988		—		6,868		(26	)		6,842
Total	$	10,041	$	28,424	$	3,016	$	38,571	$	16,170	$	7,825	$	104,047	$	13,273		$	117,320

Schedule of Information about Contract Assets from Contracts with Customers

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

	March 31, 2019			December 31, 2018
	(In thousands)
Contract assets, beginning of year	$	8,755		$	—
Additions		12,518			26,403
Transfers out		(1,959	)		(17,648	)
Contract assets, end of year	$	19,314		$	8,755