Unaudited Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Crude oil and natural gas sales	$ 1,273,238	$ 704,818	$ 3,524,618	$ 1,965,216
Gain (loss) on natural gas derivatives, net	(2,025)	8,602	(4,536)	83,482
Crude oil and natural gas service operations	10,938	13,323	40,210	24,959
Total revenues	1,282,151	726,743	3,560,292	2,073,657
Operating costs and expenses:
Production expenses	103,032	84,514	286,165	239,842
Production taxes	98,572	51,264	262,747	134,462
Transportation expenses	46,008	0	142,559	0
Exploration expenses	2,324	1,389	4,347	9,591
Crude oil and natural gas service operations	5,163	3,349	17,434	10,664
Depreciation, depletion, amortization and accretion	469,333	420,243	1,370,912	1,198,169
Property impairments	23,770	35,130	86,715	209,819
General and administrative expenses	44,151	44,006	134,368	130,413
Net (gain) loss on sale of assets and other	(1,510)	(4,905)	(8,261)	764
Total operating costs and expenses	790,843	634,990	2,296,986	1,933,724
Income from operations	491,308	91,753	1,263,306	139,933
Other income (expense):
Interest expense	(73,409)	(74,756)	(223,590)	(218,672)
Loss on extinguishment of debt	(7,133)	0	(7,133)	0
Other	869	394	2,231	1,209
Total other income (expense)	(79,673)	(74,362)	(228,492)	(217,463)
Income (loss) before income taxes	411,635	17,391	1,034,814	(77,530)
(Provision) benefit for income taxes	(97,466)	(6,770)	(244,234)	25,063
Net income (loss)	314,169	10,621	790,580	(52,467)
Foreign currency translation adjustments	105	202	123	529
Total other comprehensive income, net of tax	105	202	123	529
Comprehensive income (loss)	$ 314,274	$ 10,823	$ 790,703	$ (51,938)
Basic net income (loss) per share (in dollars per share)	$ 0.84	$ 0.03	$ 2.13	$ (0.14)
Diluted net income (loss) per share (in dollars per share)	$ 0.84	$ 0.03	$ 2.11	$ (0.14)