Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 350,000	$ 499,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depletion, depreciation and amortization	1,003,000	734,000
Impairment of oil and gas properties	210,000	0
Impairment of Inventory and Other Property and Equipment	21,000	7,000
Exploration expenses, including dry holes	22,000	11,000
Deferred income taxes	146,000	315,000
Gain on disposition of assets, net	(782,000)	(11,000)
Accretion of discount on asset retirement obligations	9,000	9,000
Discontinued operations	(4,000)	247,000
Interest expense	14,000	13,000
Derivative related activity	(22,000)	(39,000)
Amortization of stock-based compensation	70,000	63,000
Other	13,000	42,000
Change in operating assets and liabilities, net of effects from acquisitions and dispositions:
Accounts receivable, net	26,000	(77,000)
Income taxes receivable	23,000	(17,000)
Inventories	(29,000)	(27,000)
Prepaid expenses	(3,000)	(11,000)
Other current assets	(6,000)	(1,000)
Accounts payable	(266,000)	96,000
Interest payable	(4,000)	(26,000)
Income taxes payable	26,000	1,000
Other current liabilities	(28,000)	(30,000)
Net cash provided by operating activities	789,000	1,798,000
Cash flows from investing activities:
Proceeds from disposition of assets, net of cash sold	556,000	855,000
Additions to oil and gas properties	(1,573,000)	(2,259,000)
Additions to other assets and other property and equipment, net	(191,000)	(224,000)
Net cash used in investing activities	(1,208,000)	(1,628,000)
Cash flows from financing activities:
Borrowings under long-term debt	0	523,000
Principal payments on long-term debt	0	(523,000)
Distributions to noncontrolling interests	(1,000)	(1,000)
Exercise of long-term incentive plan stock options and employee stock purchases	6,000	13,000
Purchases of treasury stock	(31,000)	(33,000)
Tax benefits related to stock-based compensation	10,000	14,000
Payments of financing fees	(3,000)	0
Dividends paid	(6,000)	(6,000)
Net cash used in financing activities	(25,000)	(13,000)
Net increase (decrease) in cash and cash equivalents	(444,000)	157,000
Cash and cash equivalents, beginning of period	1,025,000	393,000
Cash and cash equivalents, end of period	$ 581,000	$ 550,000