CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (411,895)	$ (177,568)
Adjustments to reconcile net loss to net cash provided by operating activities:
Net gain on divestiture activity	0	(61)
Depletion, depreciation, amortization, and asset retirement obligation liability accretion	233,489	177,746
Impairment	989,763	6,338
Stock-based compensation expense	5,561	5,838
Net derivative (gain) loss	(545,340)	177,081
Derivative settlement gain (loss)	73,437	(4,969)
Amortization of debt discount and deferred financing costs	3,992	3,789
Gain on extinguishment of debt	(12,195)	0
Deferred income taxes	(99,347)	(47,003)
Other, net	(816)	(2,530)
Net change in working capital	(18,517)	(20,159)
Net cash provided by operating activities	218,132	118,502
Cash flows from investing activities:
Net proceeds from the sale of oil and gas properties	0	6,114
Capital expenditures	(139,306)	(249,340)
Other, net	0	291
Net cash used in investing activities	(139,306)	(242,935)
Cash flows from financing activities:
Proceeds from revolving credit facility	425,500	172,000
Repayment of revolving credit facility	(476,000)	(125,500)
Cash paid to repurchase 6.125% Senior Notes due 2022	(28,318)	0
Other, net	(3)	(18)
Net cash provided by (used in) financing activities	(78,821)	46,482
Net change in cash, cash equivalents, and restricted cash	5	(77,951)
Cash, cash equivalents, and restricted cash at beginning of period	10	77,965
Cash, cash equivalents, and restricted cash at end of period	15	14
Supplemental Cash Flow Information - Operating activities:
Cash paid for interest, net of capitalized interest	(47,469)	(39,957)
Supplemental Cash Flow Information - Investing activities:
Changes in capital expenditure accruals and other	16,802	62,185
Supplemental Cash Flow Information - Supplemental non-cash investing activities:
Carrying value of properties exchanged	$ 0	$ 65,788