CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Operating revenues
Oil and gas sales	$ 33,572	$ 30,735	$ 66,451	$ 61,554
Transportation revenue	1,422		2,745
Total revenues	34,994	30,735	69,196	61,554
Operating expenses
Lease operating expense and taxes	9,208	8,330	18,710	18,126
Depreciation, depletion and amortization	10,535	11,810	20,889	23,381
Transportation expense	551		1,116
General and administrative	3,867	3,930	7,833	8,247
Total operating expenses	24,161	24,070	48,548	49,754
Income from operations	10,833	6,665	20,648	11,800
Other income (expense)
Interest and other income	2,228	16	2,362	31
Interest expense	(645)	(724)	(1,399)	(1,474)
Gain (loss) on derivative financial instruments	(1,668)	3,260	(2,661)	1,695
Total other income (expense)	(85)	2,552	(1,698)	252
Income before taxes	10,748	9,217	18,950	12,052
Deferred income tax expense (benefit)	(6)	32	(14)	39
Net income	10,754	9,185	18,964	12,013
Less dividends and accretion on preferred shares	2	2	5	5
Net income applicable to common stockholders	$ 10,752	$ 9,183	$ 18,959	$ 12,008
Earnings per share - Basic (in dollars per share)	$ 0.15	$ 0.13	$ 0.26	$ 0.17
Earnings per share - Diluted (in dollars per share)	$ 0.15	$ 0.13	$ 0.26	$ 0.17
Weighted average common shares outstanding - Basic (in shares)	73,651,858	72,283,896	73,379,507	72,138,686
Weighted average common shares outstanding - Diluted (in shares)	73,904,104	72,852,877	73,558,350	72,723,453