CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities
Net income (loss)	$ (38,697)	$ 10,295
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	38,870	22,081
Derivative contracts:
Net losses	68,017	18,795
Cash settlements, net	4,394	7,576
Deferred income tax expense	1,212	163
Gain on sales of assets, net	(25)	(75)
Non-cash interest expense	921	796
Share-based compensation (equity-classified)	1,038	1,576
Other, net	13	13
Changes in operating assets and liabilities, net	(6,484)	(7,386)
Net cash provided by operating activities	69,259	38,682
Cash flows from investing activities
Acquisitions, net	0	(83,338)
Capital expenditures	(86,486)	(77,839)
Proceeds from sales of assets, net	18	1,551
Net cash used in investing activities	(86,468)	(159,626)
Cash flows from financing activities
Proceeds from credit facility borrowings	12,000	118,000
Repayment of credit facility borrowings	(8,000)	0
Debt issuance costs paid	0	(754)
Net cash provided by financing activities	4,000	117,246
Net decrease in cash and cash equivalents	(13,209)	(3,698)
Cash and cash equivalents – beginning of period	17,864	11,017
Cash and cash equivalents – end of period	4,655	7,319
Cash paid for:
Interest, net of amounts capitalized	8,413	3,662
Reorganization items, net	79	161
Non-cash investing and financing activities:
Changes in accounts receivable related to acquisitions	0	(26,627)
Changes in other assets related to acquisitions	0	(2,469)
Changes in accrued liabilities related to acquisitions	0	(15,320)
Changes in accrued liabilities related to capital expenditures	13,569	9,616
Changes in other liabilities for asset retirement obligations related to acquisitions	$ 0	$ 356