CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016		Sep. 30, 2015
OPERATING ACTIVITIES
Net loss		$ (212,048)		$ (1,683,701)
Adjustments to reconcile net loss to net cash provided by continuing operations activities:
Loss from discontinued operations		885		11,163
Depreciation, depletion and amortization		797,288		1,318,123
Impairment of assets		95,088		2,300,974
Amortization of deferred major repair costs		3,794		5,450
Dry hole costs		15,226		120,459
Amortization of undeveloped leases		35,828		62,331
Accretion of asset retirement obligations		35,514		35,437
Deferred and noncurrent income tax benefits		(345,157)		(975,120)
Pretax gains from disposition of assets		(3,101)		(154,183)
Net (increase) decrease in noncash operating working capital		(152,618)	[1]	97,026
Other operating activities, net		9,651		(41,431)
Net cash provided by continuing operations activities		280,350		1,096,528
INVESTING ACTIVITIES
Property additions and dry hole costs		(781,668)	[2]	(1,975,069)
Proceeds from sales of property, plant and equipment		1,154,623		423,842
Purchase of investment securities	[3]	(651,218)		(865,251)
Proceeds from maturity of investment securities	[3]	712,863		852,394
Other investing activities, net		(7,229)		(19,538)
Net cash provided (required) by investing activities		427,371		(1,583,622)
FINANCING ACTIVITIES
Borrowings of debt		541,444		885,000
Repayments of debt		(600,000)		(450,000)
Capital lease obligation payments		(7,808)		(7,156)
Purchase of treasury stock				(250,000)
Withholding tax on stock-based incentive awards		(1,138)		(8,976)
Issue cost of debt facility		(13,971)
Cash dividends paid		(163,586)		(184,789)
Other financing activities, net		(20)		(153)
Net cash required by financing activities		(245,079)		(16,074)
CASH FLOWS FROM DISCONTINUED OPERATIONS
Operating activities		2,830		(4,866)
Investing activities				5,343
Changes in cash included in current assets held for sale		(2,830)		179,774
Net increase in cash and cash equivalents of discontinued operations				180,251
Effect of exchange rate changes on cash and cash equivalents		7,268		8,276
Net increase (decrease) in cash and cash equivalents		469,910		(314,641)
Cash and cash equivalents at January 1		283,183		1,193,308
Cash and cash equivalents at September 30		$ 753,093		$ 878,667

[1] 2016 balance includes payments for deepwater rig contract exit of $266.6 million.

[2] Includes costs of $206.7 million associated with acquisition of Kaybob Duvernay and Placid Montney.

[3] Investments are Canadian government securities with maturities greater than 90 days at the date of acquisition.