Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Crude oil and natural gas sales	$ 633,850	$ 403,592
Gain on crude oil and natural gas derivatives, net	46,858	42,112
Crude oil and natural gas service operations	4,719	7,470
Total revenues	685,427	453,174
Operating costs and expenses:
Production expenses	72,854	78,640
Production taxes	41,234	30,493
Exploration expenses	4,998	3,066
Crude oil and natural gas service operations	2,837	3,043
Depreciation, depletion, amortization and accretion	382,156	463,992
Property impairments	51,372	78,927
General and administrative expenses	47,220	32,407
Net loss on sale of assets and other	5,535	1,709
Total operating costs and expenses	608,206	692,277
Income (loss) from operations	77,221	(239,103)
Other income (expense):
Interest expense	(71,172)	(80,953)
Other	442	384
Total other income (expense)	(70,730)	(80,569)
Income (loss) before income taxes	6,491	(319,672)
(Provision) benefit for income taxes	(6,022)	121,346
Net income (loss)	469	(198,326)
Foreign currency translation adjustments	138	426
Other Comprehensive Income (Loss), Net of Tax (unaudited)	138	426
Comprehensive income (loss), net of tax	$ 607	$ (197,900)
Basic net income (loss) per share (in dollars per share)	$ 0.00	$ (0.54)
Diluted net income (loss) per share (in dollars per share)	$ 0.00	$ (0.54)