Each of our reportable segments provides midstream services in a specific geographic area. Our reportable segments reflect the way in which we internally report the financial information used to make decisions and allocate resources in connection with our operations.

The Ohio Gathering reportable segment includes our investment in OGC and OCC (see Note 8). Income or loss from equity method investees, as reflected on the statements of operations, solely relates to Ohio Gathering and is recognized and disclosed on a one-month lag (see Note 8). No other line items in the statements of operations or cash flows, as disclosed in the tables below, include results for our investment in Ohio Gathering.

Corporate and Other represents those results that are: (i) not specifically attributable to a reportable segment; (ii) not individually reportable; or (iii) not allocated to our reportable segments for the purpose of evaluating their performance, including certain general and administrative expense items, natural gas and crude oil marketing services, and transaction costs.

	June 30, 2018			December 31, 2017
	(In thousands)
Assets:
Utica Shale	$	212,326		$	212,311
Ohio Gathering		670,827			690,485
Williston Basin		520,799			512,860
Piceance/DJ Basins		828,999			798,722
Barnett Shale		376,969			383,306
Marcellus Shale		213,366			217,362
Total reportable segment assets		2,823,286			2,815,046
Corporate and Other		143,450			79,996
Eliminations		(1,158	)		(249	)
Total assets	$	2,965,578		$	2,894,793

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
	(In thousands)
Revenues (1):
Utica Shale	$	10,422		$	10,456		$	20,463		$	19,252
Williston Basin		33,416			29,114			61,840			95,999
Piceance/DJ Basins		42,992			33,763			84,579			68,571
Barnett Shale		16,155			20,904			32,325			38,646
Marcellus Shale		8,050			7,365			15,875			14,269
Total reportable segments revenue		111,035			101,602			215,082			236,737
Corporate and Other		19,422			1,362			33,598			3,148
Eliminations		(2,274	)		(1,172	)		(3,177	)		(2,288	)
Total revenues	$	128,183		$	101,792		$	245,503		$	237,597

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
Percentage of total revenues (1)(2):
Counterparty A - Piceance/DJ Basins		10	%	*				11	%	*
Counterparty B - Piceance/DJ Basins	*				10	%	*			*
Counterparty C - Barnett Shale		11	%		11	%	*			*
Counterparty D - Utica Shale	*				10	%	*			*
Counterparty E - Williston Basin	*			*			*				21	%

(1) Includes recognition of revenue that was previously deferred in connection with minimum volume commitments.

Depreciation and amortization, including the amortization expense associated with our favorable and unfavorable gas gathering contracts as reported in other revenues, by reportable segment follows.

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
	(In thousands)
Depreciation and amortization (1):
Utica Shale	$	2,033	$	1,748	$	3,886	$	3,395
Williston Basin		5,622		8,385		11,231		16,766
Piceance/DJ Basins		12,450		12,225		25,005		24,436
Barnett Shale (2)		3,759		3,762		7,516		7,524
Marcellus Shale		2,274		2,263		4,546		4,526
Total reportable segment depreciation and amortization		26,138		28,383		52,184		56,647
Corporate and Other		496		154		976		308
Total depreciation and amortization	$	26,634	$	28,537	$	53,160	$	56,955

(1) Excludes depreciation and amortization recognized by Ohio Gathering due to equity method accounting.

(2) Includes the amortization expense associated with our favorable and unfavorable gas gathering contracts as reported in other revenues.

	Six months ended June 30,
	2018		2017
	(In thousands)
Cash paid for capital expenditures (1):
Utica Shale	$	1,846	$	16,473
Williston Basin		10,966		11,085
Piceance/DJ Basins		24,827		11,934
Barnett Shale		349		(399	)
Marcellus Shale		545		407
Total reportable segment capital expenditures		38,533		39,500
Corporate and Other		51,861		6,412
Total cash paid for capital expenditures	$	90,394	$	45,912

(1) Excludes cash paid for capital expenditures by Ohio Gathering due to equity method accounting.

During the six months ended June 30, 2018, Corporate included cash paid of $1.0 million for corporate purposes; the remainder represents capital expenditures for Summit Permian.

We assess the performance of our reportable segments based on segment adjusted EBITDA. We define segment adjusted EBITDA as total revenues less total costs and expenses; plus (i) other income excluding interest income, (ii) our proportional adjusted EBITDA for equity method investees (as defined below), (iii) depreciation and amortization, (iv) adjustments related to MVC shortfall payments, (v) adjustments related to capital reimbursement activity, (vi) unit-based and noncash compensation, (vii) change in the Deferred Purchase Price Obligation fair value, (viii) early extinguishment of debt expense, (ix) impairments and (x) other noncash expenses or losses, less other noncash income or gains. We define proportional adjusted EBITDA for our equity method investees as the product of (i) total revenues less total expenses, excluding impairments and other noncash income or expense items and (ii) amortization for deferred contract costs; multiplied by our ownership interest in Ohio Gathering during the respective period.

For the purpose of evaluating segment performance, we exclude the effect of Corporate and Other revenues and expenses, such as certain general and administrative expenses (including compensation-related expenses and professional services fees), natural gas and crude oil marketing services, transaction costs, interest expense, change

in the Deferred Purchase Price Obligation fair value, early extinguishment of debt expense and income tax expense or benefit from segment adjusted EBITDA.

	Three months ended June 30,				Six months ended June 30,
	2018		2017		2018		2017
	(In thousands)
Reportable segment adjusted EBITDA
Utica Shale	$	9,223	$	9,533	$	17,938	$	17,445
Ohio Gathering		8,935		9,606		19,412		18,679
Williston Basin		19,030		17,155		35,000		34,964
Piceance/DJ Basins		27,673		27,274		56,908		56,248
Barnett Shale		11,093		12,998		20,952		25,086
Marcellus Shale		6,543		5,446		13,219		11,093
Total of reportable segments' measures of profit	$	82,497	$	82,012	$	163,429	$	163,515

A reconciliation of income or loss before income taxes and income or loss from equity method investees to total of reportable segments' measures of profit or loss follows.

	Three months ended June 30,						Six months ended June 30,
	2018			2017			2018			2017
	(In thousands)
Reconciliation of (loss) income before income taxes and loss from equity method investees to total of reportable segments' measures of profit:
(Loss) income before income taxes and loss from equity method investees	$	(45,699	)	$	14,420		$	(51,101	)	$	14,945
Add:
Corporate and Other		9,002			9,435			19,625			19,528
Interest expense		14,837			17,553			29,959			34,269
Early extinguishment of debt		—			—			—			22,020
Deferred Purchase Price Obligation		69,305			(5,058	)		90,963			15,825
Depreciation and amortization		26,634			28,537			53,160			56,955
Proportional adjusted EBITDA for equity method investees		8,935			9,606			19,412			18,679
Adjustments related to MVC shortfall payments		(3,542	)		5,578			(3,542	)		(23,062	)
Adjustments related to capital reimbursement activity		115			—			155			—
Unit-based and noncash compensation		2,261			1,871			4,223			3,999
Loss (gain) on asset sales, net		62			67			(12	)		70
Long-lived asset impairment		587			3			587			287
Total of reportable segments' measures of profit	$	82,497		$	82,012		$	163,429		$	163,515

For the three and six months ended June 30, 2017, we included adjustments related to MVC shortfall payments in our calculation of segment adjusted EBITDA to account for (i) the net increases or decreases in deferred revenue for MVC shortfall payments and (ii) our inclusion of expected annual or multi-year MVC shortfall payments. With respect to the impact of a net change in deferred revenue for MVC shortfall payments, we treated increases in deferred revenue balances as a favorable adjustment to segment adjusted EBITDA, while decreases in deferred revenue balances were treated as an unfavorable adjustment to segment adjusted EBITDA. We also included a proportional amount of any historical and expected MVC shortfall payments in each quarter prior to the quarter in which we actually recognized the shortfall payment.

For the three and six months ended June 30, 2018, in accordance with Topic 606, adjustments related to MVC shortfall payments are recognized in gathering services and related fees (see Note 3).

In accordance with Topic 606, contributions in aid of construction are recognized over the remaining term of the respective contract. We include adjustments related to capital reimbursement activity in our calculation of segment adjusted EBITDA to account for revenue recognized from contributions in aid of construction.

	Three months ended June 30, 2018
	Williston Basin			Piceance/DJ Basins			Barnett Shale			Total
	(In thousands)
Adjustments related to MVC shortfall payments:
Net change in deferred revenue for MVC shortfall payments	$	—		$	—		$	—		$	—
Expected MVC shortfall adjustments		(3,386	)		(93	)		(63	)		(3,542	)
Total adjustments related to MVC shortfall payments	$	(3,386	)	$	(93	)	$	(63	)	$	(3,542	)

	Three months ended June 30, 2017
	Williston Basin		Piceance/DJ Basins			Barnett Shale			Total
	(In thousands)
Adjustments related to MVC shortfall payments:
Net change in deferred revenue for MVC shortfall payments	$	—	$	(1,186	)	$	—		$	(1,186	)
Expected MVC shortfall adjustments		1,982		6,522			(1,740	)		6,764
Total adjustments related to MVC shortfall payments	$	1,982	$	5,336		$	(1,740	)	$	5,578

	Six months ended June 30, 2018
	Williston Basin			Piceance/DJ Basins			Barnett Shale			Total
	(In thousands)
Adjustments related to MVC shortfall payments:
Net change in deferred revenue for MVC shortfall payments	$	—		$	—		$	—		$	—
Expected MVC shortfall adjustments		(3,386	)		(93	)		(63	)		(3,542	)
Total adjustments related to MVC shortfall payments	$	(3,386	)	$	(93	)	$	(63	)	$	(3,542	)

	Six months ended June 30, 2017
	Williston Basin			Piceance/DJ Basins			Barnett Shale			Total
	(In thousands)
Adjustments related to MVC shortfall payments:
Net change in deferred revenue for MVC shortfall payments	$	(37,693	)	$	(1,978	)	$	—		$	(39,671	)
Expected MVC shortfall adjustments		3,964			13,067			(422	)		16,609
Total adjustments related to MVC shortfall payments	$	(33,729	)	$	11,089		$	(422	)	$	(23,062	)