Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues
Oil, natural gas liquids and natural gas sales	$ 122,764	$ 187,822
Gain on derivative instruments, net	5,455	34,036
Total revenues	128,219	221,858
Operating Costs and Expenses
Oil, natural gas liquids and natural gas production	47,727	67,754
Production and ad valorem taxes	11,170	19,065
Depreciation, depletion and amortization	119,362	134,381
Asset impairment	220,025	6,583
Exploration	242	763
General and administrative (including non-cash stock based compensation of $2,471 and $5,080 for the three months ended March 31, 2016 and 2015, respectively)	29,525	32,055
Accretion of discount on asset retirement obligations	1,757	2,010
(Gain) loss on sale of assets and other	222	(28,344)
Total operating costs and expenses	430,030	234,267
Operating Loss	(301,811)	(12,409)
Other Income (Expense)
Interest expense	(9,833)	(11,758)
Other income	95	46
Total other expense	(9,738)	(11,712)
Loss Before Income Taxes	(311,549)	(24,121)
Income tax benefit	(108,433)	(8,701)
Net Loss	$ (203,116)	$ (15,420)
Diluted Earnings Per Average Common Share	$ (2.34)	$ (0.21)
Basic Earnings Per Average Common Share	$ (2.34)	$ (0.21)
Diluted Average Common Shares Outstanding (in shares)	86,632	72,830
Basic Average Common Shares Outstanding (in shares)	86,632	72,830
Dividends Per Common Share	$ 0	$ 0.02