Consolidated statements of cash flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ 235,095	$ (9,491)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-settled equity-based compensation, net	2,376	7,406
Depletion, depreciation and amortization	61,302	63,098
Impairment expense	26,250	0
Mark-to-market on derivatives:
(Gain) loss on derivatives, net	(297,836)	48,365
Settlements received for matured commodity derivatives, net	47,723	102
Premiums paid for commodity derivatives	(477)	(4,016)
Amortization of debt issuance costs	1,217	846
Amortization of operating lease right-of-use assets	4,377	3,056
Loss on extinguishment of debt	13,320	0
Deferred income tax expense (benefit)	2,417	(96)
Other, net	1,327	3,874
Decrease (increase) in accounts receivable, net	9,635	(13,373)
Decrease (increase) in other current assets	4,033	(2,769)
(Increase) decrease in other noncurrent assets, net	(2,964)	57
Increase in accounts payable and accrued liabilities	25,059	7,140
(Decrease) increase in undistributed revenue and royalties	(4,937)	2,889
Decrease in other current liabilities	(15,082)	(30,637)
(Decrease) increase in other noncurrent liabilities	(3,246)	1,007
Net cash provided by operating activities	109,589	77,458
Cash flows from investing activities:
Acquisitions of oil and natural gas properties, net	(22,876)	0
Capital expenditures:
Oil and natural gas properties	(135,376)	(152,729)
Midstream service assets	(761)	(2,262)
Other fixed assets	(829)	(505)
Proceeds from dispositions of capital assets, net of selling costs	51	43
Net cash used in investing activities	(159,791)	(155,453)
Cash flows from financing activities:
Borrowings on Senior Secured Credit Facility	0	80,000
Payments on Senior Secured Credit Facility	(100,000)	0
Issuance of January 2025 Notes and January 2028 Notes	1,000,000	0
Extinguishment of debt	(808,855)	0
Stock exchanged for tax withholding	(640)	(2,612)
Payments for debt issuance costs	(18,383)	0
Net cash provided by financing activities	72,122	77,388
Net increase (decrease) in cash and cash equivalents	21,920	(607)
Cash and cash equivalents, beginning of period	40,857	45,151
Cash and cash equivalents, end of period	$ 62,777	$ 44,544