Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net income (loss)	$ 74,016	$ (25,674)
Adjustments to reconcile net income (loss) to cash flows from operating activities
Depletion, depreciation, and amortization	96,862	57,297
Write-down of oil and natural gas properties	72,541	0
Deferred income taxes	(4,209)	(9,478)
Stock-based compensation	2,453	3,263
Commodity derivatives expense (income)	(146,771)	83,377
Receipt on settlements of commodity derivatives	24,638	8,206
Gain on debt extinguishment	(18,994)	0
Debt issuance costs and discounts	4,926	1,263
Other, net	(673)	908
Changes in assets and liabilities, net of effects from acquisitions
Accrued production receivable	66,937	(21,591)
Trade and other receivables	(22,914)	1,024
Other current and long-term assets	2,539	(387)
Accounts payable and accrued liabilities	(72,607)	(35,966)
Oil and natural gas production payable	(15,948)	4,605
Other liabilities	(954)	(2,481)
Net cash provided by operating activities	61,842	64,366
Cash flows from investing activities
Oil and natural gas capital expenditures	(46,016)	(86,986)
Pipelines and plants capital expenditures	(6,294)	(1,682)
Net proceeds from sales of oil and gas properties and equipment	40,543	104
Other	(4,521)	(3,237)
Net cash used in investing activities	(16,288)	(91,801)
Cash flows from financing activities
Bank repayments	(161,000)	(103,000)
Bank borrowings	161,000	103,000
Interest payments treated as a reduction of debt	(18,211)	0
Cash paid in conjunction with debt repurchases	(14,171)	0
Pipeline financing and capital lease debt repayments	(3,690)	(4,108)
Other	(2,953)	(1,099)
Net cash used in financing activities	(39,025)	(5,207)
Net increase (decrease) in cash, cash equivalents, and restricted cash	6,529	(32,642)
Cash, cash equivalents, and restricted cash at beginning of period	33,045	54,949
Cash, cash equivalents, and restricted cash at end of period	$ 39,574	$ 22,307