CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net (loss) including noncontrolling interest		$ (293,864)	$ (833,102)
Adjustments to reconcile net loss to net cash provided (required) by continuing operations activities
Loss (income) from discontinued operations		(106)	6,129
Depreciation, depletion and amortization		425,566	537,548
Previously suspended exploration costs		633	7,677
Amortization of undeveloped leases		8,882	14,770
Accretion of asset retirement obligations		22,656	20,435
Impairment of assets		171,296	987,146
Noncash restructuring expense		0	17,565
Deferred income tax benefit		(101,195)	(167,902)
Mark to market loss (gain) on contingent consideration		76,677	(43,529)
Mark to market loss (gain) on crude contracts		284,360	(173,848)
Long-term non-cash compensation		25,318	22,760
Net (increase) decrease in noncash working capital		26,565	1,335
Other operating activities, net		39,494	(27,605)
Net cash provided by continuing operations activities		686,282	369,379
Investing Activities
Property additions and dry hole costs		(445,314)	(537,601)
Property additions for King's Quay FPS		(17,734)	(51,635)
Proceeds from sales of property, plant and equipment		269,363	0
Net cash (required) by investing activities		(193,685)	(589,236)
Financing Activities
Borrowings on revolving credit facility		165,000	370,000
Repayment of revolving credit facility		(365,000)	(200,000)
Retirement of debt		(576,358)	(12,225)
Debt issuance, net of cost		541,974	(613)
Early redemption of debt cost		(34,177)	0
Distributions to noncontrolling interest		(75,238)	(32,400)
Cash dividends paid		(38,590)	(57,590)
Withholding tax on stock-based incentive awards		(3,895)	(7,247)
Proceeds from term loan and other loans		0	371
Capital lease obligation payments		(371)	(336)
Net cash (required) provided by financing activities		(386,655)	59,960
Cash Flows from Discontinued Operations
Operating activities	[1]	0	(1,202)
Investing activities	[1]	0	4,494
Financing activities	[1]	0	0
Net cash provided by discontinued operations	[1]	0	3,292
Effect of exchange rate changes on cash and cash equivalents		1,552	(1,358)
Net increase (decrease) in cash and cash equivalents		107,494	(161,255)
Cash and cash equivalents at beginning of period		310,606	306,760
Cash and cash equivalents at end of period		$ 418,100	$ 145,505

[1] Net cash provided by discontinued operations is not part of the cash flow reconciliation. See Notes to Consolidated Financial Statements, page 7.