CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 69,323	$ 534,130
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization	294,406	299,294
Deferred income tax expense	46,513	188,997
Loss on sale of assets	139	1,464
Exploratory dry hole cost	2,011	16
Gain on derivative instruments	(17,783)	(82,966)
Net cash received in settlement of derivative instruments	33,529	114,931
Loss (earnings) on equity method investments	59	(11,194)
Distribution of earnings from equity method investments	0	12,610
Amortization of debt issuance costs	2,234	3,219
Stock-based compensation and other	34,204	22,720
Changes in assets and liabilities:
Accounts receivable, net	72,285	203,164
Income taxes	(27,020)	(16,746)
Inventories	(1,433)	(7,119)
Other current assets	(637)	(1,338)
Accounts payable and accrued liabilities	(25,118)	(43,413)
Interest payable	(13,691)	(12,825)
Other assets and liabilities	1,372	(22,133)
Net cash provided by operating activities	470,393	1,182,811
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(478,422)	(620,696)
Proceeds from sale of assets	335	2,401
Investment in equity method investments	(35)	(8,977)
Distribution of investment from equity method investments	0	1,656
Proceeds from sale of equity method investments	(9,424)	0
Net cash used in investing activities	(487,546)	(625,616)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings from debt	123,000	95,000
Repayments of debt	(182,000)	(102,000)
Treasury stock repurchases	0	(347,446)
Dividends paid	(119,532)	(104,722)
Tax withholdings on vesting of stock awards	(6,350)	(10,587)
Capitalized debt issuance costs	0	(7,411)
Net cash used in financing activities	(184,882)	(477,166)
Net (decrease) increase in cash, cash equivalents and restricted cash	(202,035)	80,029
Cash, cash equivalents and restricted cash, beginning of period	213,783	2,287
Cash, cash equivalents and restricted cash, end of period	$ 11,748	$ 82,316