CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Oil, natural gas, and natural gas liquids sales	$ 64,457	$ 118,042
Interest and other	737	132
Total revenues	65,194	118,174
Costs, expenses, and other:
Lease operating expenses	14,510	21,204
Production and property taxes	3,225	2,216
Transportation and processing costs	2,515	3,280
General and administrative	8,240	20,014
Depreciation, depletion, and amortization	21,415	48,543
Interest expense	16,011	36,128
Realized and unrealized losses on derivative instruments, net	12,851	25,580
Other, net	8,648	28,820
Total costs, expenses, and other	87,415	185,785
Loss before income taxes	(22,221)	(67,611)
Income tax (benefit) expense	(1,214)	337
Net loss	$ (21,007)	$ (67,948)
Basic loss per common share (in dollars per share)	$ (0.18)	$ (0.59)
Diluted loss per common share (in dollars per share)	$ (0.18)	$ (0.59)