CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues and other income:
Oil and gas revenue	$ 103,432	$ 62,125
Other income, net	48,534	8
Total revenues and other income	151,966	62,133
Costs and expenses:
Oil and gas production	19,886	29,392
Facilities insurance modifications, net	2,574
Exploration expenses	105,714	23,858
General and administrative	15,787	17,920
Depletion and depreciation	34,978	31,266
Interest and other financing costs, net	16,786	10,324
Derivatives, net	(37,857)	(4,345)
Other expenses, net	762	14,733
Total costs and expenses	158,630	123,148
Loss before income taxes	(6,664)	(61,015)
Income tax expense (benefit)	22,177	(2,022)
Net loss	$ (28,841)	$ (58,993)
Net loss per share:
Basic (in dollars per share)	$ (0.07)	$ (0.15)
Diluted (in dollars per share)	$ (0.07)	$ (0.15)
Weighted average number of shares used to compute net loss per share:
Basic (in shares)	387,312	384,435
Diluted (in shares)	387,312	384,435