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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss including non-controlling interests	$ (56,804)	$ (312,589)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation, depletion and amortization	367,191	302,835
Loss on extinguishment of debt	0	13,651
(Gain) loss on sale of properties	3,198	(1,954)
Impairment	653	384,228
Deferred income taxes	8,617	(100,293)
Derivative instruments	82,862	191,401
Equity-based compensation expenses	17,924	14,130
Deferred financing costs amortization and other	12,245	10,518
Working capital and other changes:
Change in accounts receivable, net	(12,914)	(5,866)
Change in inventory	3,029	(4,721)
Change in prepaid expenses	3,918	573
Change in accounts payable, interest payable and accrued liabilities	(36,514)	40,849
Change in other assets and liabilities, net	(4,473)	(746)
Net cash provided by operating activities	388,932	532,016
Cash flows from investing activities:
Capital expenditures	(525,501)	(536,959)
Acquisitions	(5,781)	(524,255)
Proceeds from sale of properties	0	2,236
Derivative settlements	3,629
Derivative settlements		(96,823)
Other	0	(933)
Net cash used in investing activities	(527,653)	(1,156,734)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities	1,178,000	1,933,000
Principal payments on Revolving Credit Facilities	(1,025,000)	(1,265,000)
Repurchase of senior unsecured notes	0	(423,143)
Proceeds from issuance of senior unsecured notes	0	400,000
Deferred financing costs	(482)	(6,790)
Purchases of treasury stock	(4,305)	(6,064)
Distributions to non-controlling interests	(10,093)	(6,846)
Other	(1,331)	(87)
Net cash provided by financing activities	136,789	625,070
Increase (decrease) in cash and cash equivalents	(1,932)	352
Cash and cash equivalents:
Beginning of period	22,190	16,720
End of period	20,258	17,072
Supplemental non-cash transactions:
Change in accrued capital expenditures	(30,598)	90,040
Change in asset retirement obligations	3,840	5,407
Issuance of shares in connection with acquisition	$ 0	$ 371,220

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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