CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues and other income:
Oil and gas revenue	$ 62,125	$ 109,164
Gain on sale of assets		22,751
Other income	8	642
Total revenues and other income	62,133	132,557
Costs and expenses:
Oil and gas production	29,392	32,100
Exploration expenses	23,858	98,941
General and administrative	17,920	38,667
Depletion and depreciation	31,266	37,007
Interest and other financing costs, net	10,324	10,751
Derivatives, net	(4,345)	(32,327)
Other expenses, net	14,733	628
Total costs and expenses	123,148	185,767
Loss before income taxes	(61,015)	(53,210)
Income tax expense (benefit)	(2,022)	25,699
Net loss	$ (58,993)	$ (78,909)
Net loss per share:
Basic (in dollars per share)	$ (0.15)	$ (0.21)
Diluted (in dollars per share)	$ (0.15)	$ (0.21)
Weighted average number of shares used to compute net loss per share:
Basic (in shares)	384,435	380,355
Diluted (in shares)	384,435	380,355