Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income (loss)	$ 774,473	$ 989,700	$ 789,447
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion, amortization and accretion	2,019,704	1,859,118	1,670,838
Property impairments	86,202	125,210	237,370
Non-cash (gain) loss on derivatives, net	15,612	(13,009)	(58,031)
Stock-based compensation	52,044	47,236	45,868
Tax benefit from US tax reform legislation	0	0	(713,655)
Provision for deferred income taxes from operations	212,689	314,878	88,056
Litigation settlement	0	0	59,600
Net gain on sale of assets and other	(535)	(16,671)	(55,124)
Loss on extinguishment of debt	4,584	7,133	554
Other, net	10,408	16,705	12,768
Changes in assets and liabilities:
Accounts receivable	(33,619)	94,765	(329,811)
Inventories	(21,204)	7,735	14,517
Other current assets	(4,459)	(3,539)	1,038
Accounts payable trade	(36,359)	9,274	137,339
Revenues and royalties payable	69,195	24,010	158,982
Accrued liabilities and other	(36,467)	(4,162)	21,368
Other noncurrent assets and liabilities	3,420	(2,375)	(2,018)
Net cash provided by operating activities	3,115,688	3,456,008	2,079,106
Cash flows from investing activities:
Exploration and development	(2,783,149)	(2,840,880)	(1,931,942)
Purchase of producing crude oil and natural gas properties	(51,558)	(31,579)	(8,446)
Purchase of other property and equipment	(25,983)	(42,171)	(12,810)
Proceeds from sale of assets	88,734	54,458	144,353
Net cash used in investing activities	(2,771,956)	(2,860,172)	(1,808,845)
Cash flows from financing activities:
Credit facility borrowings	1,216,000	2,024,000	1,302,000
Repayment of credit facility	(1,161,000)	(2,212,000)	(2,019,000)
Proceeds from issuance of Senior Notes	0	0	990,000
Redemption of Senior Notes	(500,000)	(400,000)	0
Premium on redemption of Senior Notes	(4,167)	(6,700)	0
Repayment of other debt	(2,352)	(2,286)	(502,214)
Debt issuance costs	0	(5,535)	(1,999)
Equity transaction costs	0	(4,838)	0
Contributions from noncontrolling interests	109,137	267,920	0
Distributions to noncontrolling interests	(14,164)	(604)	0
Payments for Repurchase of Common Stock	(190,239)	0	0
Repurchase of restricted stock for tax withholdings	(21,943)	(16,891)	(11,821)
Dividends paid on common stock	(18,380)	0	0
Net cash used in financing activities	(587,108)	(356,934)	(243,034)
Effect of exchange rate on cash and cash equivalents	27	(55)	32
Net change in cash and cash equivalents	(243,349)	238,847	27,259
Cash and cash equivalents at beginning of period	282,749	43,902	16,643
Cash and cash equivalents at end of period	$ 39,400	$ 282,749	$ 43,902