Unaudited Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities
Net income	$ 863,293	$ 631,395
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, amortization and accretion	970,273	694,729
Property impairments	223,085	161,960
Non-cash (gain) loss on derivatives, net	(269,018)	37,638
Stock-based compensation	39,419	29,460
Provision for deferred income taxes	504,737	360,599
Dry hole costs	9,142	9,180
(Gain) loss on sale of assets, net	952	(112)
Loss on Extinguishment of Debt	24,517	0
Other, net	5,986	4,308
Changes in assets and liabilities:
Accounts receivable	(192,178)	(178,171)
Inventories	(28,124)	(8,529)
Prepaid expenses and other	(7,017)	(11,118)
Accounts payable trade	82,297	151,266
Revenues and royalties payable	32,500	46,611
Accrued liabilities and other	16,645	41,791
Other noncurrent assets and liabilities	1,342	7,446
Net cash provided by operating activities	2,277,851	1,978,453
Cash flows from investing activities
Exploration and development	(3,255,327)	(2,767,448)
Purchase of producing crude oil and natural gas properties	(48,305)	(12,404)
Purchase of other property and equipment	(51,974)	(41,942)
Proceeds from sale of assets	129,346	22,406
Net cash used in investing activities	(3,226,260)	(2,799,388)
Cash flows from financing activities
Credit facility borrowings	1,105,000	470,000
Repayment of credit facility	(1,380,000)	(1,065,000)
Proceeds from Issuance of Senior Notes	1,681,834	1,479,375
Early Repayment of Senior Debt	(300,000)	0
Redemption Premium	(17,497)	0
Repayment of other debt	(1,503)	(1,457)
Debt issuance costs	(7,999)	(2,263)
Repurchase of equity grants	(7,618)	(3,942)
Net cash provided by financing activities	1,072,217	876,713
Net change in cash and cash equivalents	123,808	55,778
Cash and cash equivalents at beginning of period	28,482	35,729
Cash and cash equivalents at end of period	$ 152,290	$ 91,507