CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities
Net income (loss)	$ 24,050	$ 43,463
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	88,370	31,545
Derivative contracts:
Net losses (gains)	111,725	(15,802)
Cash settlements, net	(35,191)	(1,670)
Deferred income tax expense	153	0
(Gain) loss on sales of assets, net	(81)	60
Non-cash interest expense	2,509	1,362
Share-based compensation (equity-classified)	3,472	2,707
Other, net	38	59
Changes in operating assets and liabilities, net	(2,140)	(11,430)
Net cash provided by operating activities	192,905	50,294
Cash flows from investing activities
Acquisitions, net	(85,387)	(200,162)
Capital expenditures	(323,259)	(67,844)
Proceeds from sales of assets, net	7,989	0
Net cash used in investing activities	(400,657)	(268,006)
Cash flows from financing activities
Proceeds from credit facility borrowings	205,500	39,000
Repayment of credit facility borrowings	0	(7,000)
Proceeds from second lien facility, net	0	196,000
Debt issuance costs paid	(754)	(9,562)
Proceeds received from rights offering, net	0	55
Other, net	0	(55)
Net cash provided by financing activities	204,746	218,438
Net (decrease) increase in cash and cash equivalents	(3,006)	726
Cash and cash equivalents – beginning of period	11,017	6,761
Cash and cash equivalents – end of period	8,011	7,487
Cash paid for:
Interest, net of amounts capitalized	15,174	1,596
Reorganization items, net	514	1,098
Non-cash investing and financing activities:
Changes in accounts receivable related to acquisitions	(26,631)	0
Changes in other assets related to acquisitions	(2,469)	0
Changes in accrued liabilities related to acquisitions	(15,099)	0
Changes in accrued liabilities related to capital expenditures	1,833	8,140
Changes in other liabilities for asset retirement obligations related to acquisitions	$ 382	$ 0