CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities
Net income (loss)	$ 7,774	$ 49,410
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	53,354	20,886
Derivative contracts:
Net (gains) losses	71,036	(28,077)
Cash settlements, net	(19,977)	(2,458)
Deferred income tax expense	163	0
(Gain) loss on sales of assets, net	(79)	69
Non-cash interest expense	1,644	988
Share-based compensation (equity-classified)	2,451	1,694
Other, net	26	38
Changes in operating assets and liabilities, net	4,026	(6,533)
Net cash provided by operating activities	120,418	36,017
Cash flows from investing activities
Acquisitions, net	(86,835)	0
Capital expenditures	(201,350)	(43,583)
Proceeds from sales of assets, net	2,525	0
Net cash used in investing activities	(285,660)	(43,583)
Cash flows from financing activities
Proceeds from credit facility borrowings	166,500	14,000
Repayment of credit facility borrowings	0	(2,000)
Debt issuance costs paid	(754)	(1,090)
Proceeds received from rights offering, net	0	55
Other, net	0	(55)
Net cash provided by financing activities	165,746	10,910
Net increase in cash and cash equivalents	504	3,344
Cash and cash equivalents – beginning of period	11,017	6,761
Cash and cash equivalents – end of period	11,521	10,105
Cash paid for:
Interest, net of amounts capitalized	8,953	795
Reorganization items, net	442	901
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	12,231	2,322
Changes in other liabilities for asset retirement obligations related to acquisitions	$ 382	$ 0