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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 156,818	$ 84,284
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization	185,697	194,757
Deferred income tax expense	14,695	52,089
(Gain) loss on sale of assets	(91)	170
Exploratory dry hole cost	0	2,011
Loss (gain) on derivative instruments	100,358	(60,036)
Net cash received in settlement of derivative instruments	3,050	19,423
Loss on equity method investments	0	59
Amortization of debt issuance costs	1,424	1,501
Stock-based compensation and other	14,702	23,463
Changes in assets and liabilities:
Accounts receivable, net	32,024	91,106
Income taxes	(16,253)	(25,547)
Inventories	(2,125)	(4,452)
Other current assets	(2,983)	(1,663)
Accounts payable and accrued liabilities	(11,872)	(36,453)
Interest payable	(2,622)	(97)
Other assets and liabilities	(3,353)	718
Net cash provided by operating activities	469,469	341,333
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(274,939)	(331,183)
Proceeds from sale of assets	112	275
Investment in equity method investments	0	(35)
Proceeds from sale of equity method investments	0	(9,424)
Net cash used in investing activities	(274,827)	(340,367)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of debt	(88,000)	0
Dividends paid	(83,850)	(79,675)
Tax withholdings on vesting of stock awards	(5,569)	(6,332)
Net cash used in financing activities	(177,419)	(86,007)
Net increase (decrease) in cash, cash equivalents and restricted cash	17,223	(85,041)
Cash, cash equivalents and restricted cash, beginning of period	151,691	213,783
Cash, cash equivalents and restricted cash, end of period	$ 168,914	$ 128,742

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