The following tables present selected financial information for the periods presented regarding the Company’s operating segments on a stand-alone basis, corporate expenses that are not allocated to a segment and the consolidation and elimination entries necessary to arrive at the financial information for the Company on a consolidated basis (in thousands). On a consolidated basis, midstream services revenues consist primarily of those revenues from midstream operations related to third parties, including working interest owners in the Company’s operated wells. All midstream services revenues associated with Company-owned production are eliminated in consolidation. In evaluating the operating results of the exploration and production and midstream segments, the Company does not allocate certain expenses to the individual segments, including general and administrative expenses. Such expenses are reflected in the column labeled “Corporate.”



	Exploration and Production								Consolidations and Eliminations			Consolidated Company
	Exploration and Production			Midstream		Corporate			Consolidations and Eliminations			Consolidated Company
Year Ended December 31, 2017
Oil and natural gas revenues	$	525,862		$	2,822	$	—		$	—		$	528,684
Midstream services revenues	—			47,037		—			(36,839		)	10,198
Realized loss on derivatives	(4,321		)	—		—			—			(4,321		)
Unrealized gain on derivatives	9,715			—		—			—			9,715
Expenses ⁽¹⁾	333,923			23,420		62,931			(36,839		)	383,435
Operating income (loss) ⁽²⁾	$	197,333		$	26,439	$	(62,931	)	$	—		$	160,841
Total assets	$	1,768,393		$	257,871	$	119,426		$	—		$	2,145,690
Capital expenditures ⁽³⁾	$	753,157		$	114,113	$	5,688		$	—		$	872,958

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(1)	Includes depletion, depreciation and amortization expenses of $170.5 million and $5.2 million for the exploration and production and midstream segments, respectively. Also includes corporate depletion, depreciation and amortization expenses of $1.7 million.


(2)	Includes $12.1 million in net income attributable to non-controlling interest in subsidiaries related to the midstream segment.


(3)	Includes $54.9 million in capital expenditures attributable to non-controlling interest in subsidiaries related to the midstream segment.



	Exploration and Production								Consolidations and Eliminations			Consolidated Company
	Exploration and Production			Midstream		Corporate			Consolidations and Eliminations			Consolidated Company
Year Ended December 31, 2016
Oil and natural gas revenues	$	289,512		$	1,644	$	—		$	—		$	291,156
Midstream services revenues	—			18,982		—			(13,764		)	5,218
Realized gain on derivatives	9,286			—		—			—			9,286
Unrealized loss on derivatives	(41,238		)	—		—			—			(41,238		)
Expenses ⁽¹⁾	391,098			8,254		56,001			(13,764		)	441,589
Operating (loss) income ⁽²⁾	$	(133,538	)	$	12,372	$	(56,001	)	$	—		$	(177,167	)
Total assets	$	1,098,525		$	140,459	$	225,681		$	—		$	1,464,665
Capital expenditures	$	379,881		$	67,566	$	6,913		$	—		$	454,360

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(1)	Includes depletion, depreciation and amortization expenses of $118.4 million and $2.7 million for the exploration and production and midstream segments, respectively. Also includes corporate depletion, depreciation and amortization expenses of $0.9 million and full-cost ceiling impairment expense of $158.6 million for the exploration and production segment.


(2)	Includes $0.4 million in net income attributable to non-controlling interest in subsidiaries related to the midstream segment.



	Exploration and Production								Consolidations and Eliminations			Consolidated Company
	Exploration and Production			Midstream		Corporate			Consolidations and Eliminations			Consolidated Company
Year Ended December 31, 2015
Oil and natural gas revenues	$	277,844		$	496	$	—		$	—		$	278,340
Midstream services revenues	—			11,485		—			(9,621		)	1,864
Realized gain on derivatives	77,094			—		—			—			77,094
Unrealized loss on derivatives	(39,265		)	—		—			—			(39,265		)
Expenses ⁽¹⁾	1,078,534			5,178		50,604			(9,621		)	1,124,695
Operating (loss) income ⁽²⁾	$	(762,861	)	$	6,803	$	(50,604	)	$	—		$	(806,662	)
Total assets	$	1,000,075		$	75,980	$	64,806		$	—		$	1,140,861
Capital expenditures ⁽³⁾	$	622,642		$	75,009	$	786		$	—		$	698,437

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(1)	Includes depletion, depreciation and amortization expenses of $176.7 million and $1.6 million for the exploration and production and midstream segments, respectively. Also includes corporate depletion, depreciation and amortization expenses of $0.5 million and full-cost ceiling impairment expense of $801.2 million for the exploration and production segment.


(2)	Includes $0.3 million in net income attributable to non-controlling interest in subsidiaries related to the midstream segment.


(3)	In October 2015, the Company sold the Loving County Processing System to EnLink and the cost basis of $31.0 million for those assets was removed from the total midstream assets.