CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income (loss)	$ 10,295	$ 28,081
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	22,081	9,810
Derivative contracts:
Net (gains) losses	18,795	(17,016)
Cash settlements, net	(7,576)	(1,992)
Deferred Income Tax Expense (Benefit)	163	0
Gain on sales of assets, net	(75)	(65)
Non-cash interest expense	796	188
Share-based compensation (equity-classified)	1,576	846
Other, net	13	18
Changes in operating assets and liabilities, net	(7,386)	(10,728)
Net cash provided by operating activities	38,682	9,142
Cash flows from investing activities
Acquisitions, net	(83,338)	0
Capital expenditures	(77,839)	(17,741)
Proceeds from sales of assets, net	1,551	0
Net cash used in investing activities	(159,626)	(17,741)
Cash flows from financing activities
Proceeds from credit facility borrowings	118,000	7,000
Repayment of credit facility borrowings	0	(2,000)
Debt issuance costs paid	(754)	0
Proceeds from (Payments for) Other Financing Activities	0	(30)
Net cash provided by financing activities	117,246	4,970
Cash paid for:
Interest, net of amounts capitalized	3,662	348
Reorganization items, net	161	634
Non-cash investing and financing activities:
Changes in accrued liabilities related to capital expenditures	9,616	2,262
Increase (Decrease) in Accounts Receivable, Acquisitions	(26,627)	0
Increase (Decrease) in Other Assets, Acquisitions	(2,469)	0
Increase (Decrease) in Accrued Liabilities, Acquisitions	(15,320)	0
Net decrease in cash and cash equivalents	(3,698)	(3,629)
Cash and cash equivalents – beginning of period	11,017	6,761
Cash and cash equivalents – end of period	$ 7,319	$ 3,132