CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
REVENUES
Oil and gas sales	$ 110,586	$ 98,364
Midstream services	1,616	896
Drilling rig services	6,879	5,317
Other operating revenues	5,524	2,290
Total revenues	124,605	106,867
COSTS AND EXPENSES
Production	26,447	31,489
Exploration:
Abandonments and impairments	3,839	810
Seismic and other	1,483	2,587
Midstream services	534	407
Drilling rig services	4,856	5,068
Depreciation, depletion and amortization	36,255	39,063
Impairment of property and equipment	3,406	69,537
Accretion of asset retirement obligations	886	1,068
General and administrative	11,818	7,588
Other operating expenses	502	133
Total costs and expenses	90,026	157,750
Operating income (loss)	34,579	(50,883)
OTHER INCOME (EXPENSE)
Interest expense	(12,521)	(10,571)
Loss on derivatives	(5,041)	(6,535)
Other	840	1,949
Total other income (expense)	(16,722)	(15,157)
Income (loss) before income taxes	17,857	(66,040)
Income tax (expense) benefit	(6,465)	24,831
NET INCOME (LOSS)	$ 11,392	$ (41,209)
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.94	$ (3.39)
Diluted (in dollars per share)	$ 0.94	$ (3.39)
Weighted average common shares outstanding:
Basic (in shares)	12,166	12,165
Diluted (in shares)	12,166	12,165