CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	[1]
Revenues
Revenue from sales to customers	$ 606,954	$ 509,035
Gain (loss) on crude contracts	(29,502)	37,077
Gain on sale of assets and other income	8,153	130,528
Total revenues	585,605	676,640
Costs and Expenses
Lease operating expenses	136,496	122,142
Severance and ad valorem taxes	12,157	11,213
Exploration expenses, including undeveloped lease amortization	28,928	28,663
Selling and general expenses	51,417	51,255
Depreciation, depletion and amortization	230,733	236,154
Accretion of asset retirement obligations	9,914	10,556
Other expense (benefit)	(11,048)	2,157
Total costs and expenses	458,597	462,140
Operating income from continuing operations	127,008	214,500
Other income (loss)
Interest and other income (loss)	15,084	(15,021)
Interest expense, net	(45,049)	(44,597)
Total other loss	(29,965)	(59,618)
Income from continuing operations before income taxes	97,043	154,882
Income tax expense (benefit)	(71,647)	97,387
Income from continuing operations	168,690	57,495
Income (loss) from discontinued operations, net of income taxes	(437)	969
NET INCOME	$ 168,253	$ 58,464
INCOME PER COMMON SHARE - BASIC
Continuing operations	$ 0.98	$ 0.33
Discontinued operations	(0.01)	0.01
Net Income	0.97	0.34
INCOME PER COMMON SHARE - DILUTED
Continuing operations	0.97	0.33
Discontinued operations	(0.01)	0.01
Net Income	0.96	0.34
Cash dividends per Common share	$ 0.25	$ 0.25
Average Common shares outstanding
Basic	172,805,065	172,422,449
Diluted	174,619,524	173,088,691

[1] Reclassified to conform to current presentation (see Notes A and B).