Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement of Cash Flows [Abstract]
Net income	$ 580,365	$ 790,580
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, Depletion, Amortization and Accretion	1,465,856	1,370,676
Property impairments	66,854	86,715
Non-cash (gain) loss on derivatives, net	(1,303)	12,013
Stock-based compensation	37,153	33,209
Provision for deferred income taxes	177,386	252,012
(Gain) loss on sale of assets, net	647	(8,261)
Loss on extinguishment of debt	4,584	7,133
Other, net	8,036	11,069
Changes in assets and liabilities:
Accounts receivable	(42,269)	(139,219)
Inventories	(21,867)	(7,852)
Other current assets	(3,808)	(4,766)
Accounts payable trade	56,624	32,708
Revenues and royalties payable	(309)	86,814
Accrued liabilities and other	(15,707)	(19,677)
Other noncurrent assets and liabilities	(366)	(2,413)
Net cash provided by operating activities	2,311,876	2,500,741
Cash flows from investing activities
Exploration and development	(2,268,594)	(2,093,010)
Purchase of producing crude oil and natural gas properties	(49,324)	(25,476)
Purchase of other property and equipment	(22,875)	(15,724)
Proceeds from sale of assets	86,866	30,727
Net cash used in investing activities	(2,253,927)	(2,103,483)
Cash flows from financing activities
Credit facility borrowings	776,000	1,706,000
Repayment of credit facility	(476,000)	(1,704,000)
Redemption of Senior Notes	500,000	400,000
Premium and costs on redemption of Senior Notes	(4,167)	(6,700)
Repayment of other debt	(1,754)	(1,707)
Debt issuance costs	0	(5,543)
Contributions from noncontrolling interests	104,494	0
Distributions to noncontrolling interests	(10,493)	0
Payments for Repurchase of Common Stock	(171,965)	0
Repurchase of restricted stock for tax withholdings	(21,573)	(16,303)
Net cash used in financing activities	(305,458)	(428,253)
Effect of Exchange Rate on Cash and Cash Equivalents	20	(11)
Net change in cash and cash equivalents	(247,489)	(31,006)
Cash and cash equivalents at beginning of period	282,749	43,902
Cash and cash equivalents at end of period	$ 35,260	$ 12,896