Consolidated statements of operations (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Commodity sales	$ 179,383	$ 161,623	$ 545,698	$ 433,489
Gain from oil hedging activities	0	9,032	0	28,544
Total revenues	179,383	170,655	545,698	462,033
Costs and expenses:
Lease operating	42,077	37,306	113,662	104,232
Production taxes	7,133	8,831	21,935	25,299
Depreciation, depletion & amortization	61,527	47,582	180,631	139,439
Loss on impairment of other assets	0	1,090	0	1,090
General and administrative	14,820	13,065	43,199	38,626
Total costs and expenses	125,557	107,874	359,427	308,686
Operating income	53,826	62,781	186,271	153,347
Non-operating income (expense):
Interest expense	(25,434)	(24,074)	(78,096)	(72,565)
Non-hedge derivative gains (losses)	104,413	(43,830)	17,218	(26,484)
Other income, net	442	425	1,407	837
Net non-operating income (expense)	79,421	(67,479)	(59,471)	(98,212)
Income (loss) before income taxes	133,247	(4,698)	126,800	55,135
Income tax expense (benefit)	49,734	(2,130)	47,315	19,993
Net income (loss)	$ 83,513	$ (2,568)	$ 79,485	$ 35,142