CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenues
Oil and gas sales	$ 30,178	$ 26,893	$ 58,532	$ 50,073
Operating expenses
Lease operating expense and taxes	7,177	8,706	15,677	16,441
Depreciation, depletion and amortization	11,232	6,849	21,337	12,978
General and administrative	6,217	3,599	10,510	7,163
Total operating expenses	24,626	19,154	47,524	36,582
Income from operations	5,552	7,739	11,008	13,491
Other income (expense)
Interest and other income	20	16	45	35
Interest expense	(830)	(774)	(1,605)	(1,344)
Gain (loss) on derivative financial instruments	489	2,037	(389)	(3,735)
Total other income (expense)	(321)	1,279	(1,949)	(5,044)
Income before taxes	5,231	9,018	9,059	8,447
Deferred income tax benefit	(28)	(12)	(11)	(7)
Net income	5,259	9,030	9,070	8,454
Less dividends and accretion on preferred shares	2	3	5	5
Net income applicable to common stockholders	$ 5,257	$ 9,027	$ 9,065	$ 8,449
Earnings per share - Basic (in dollars per share)	$ 0.07	$ 0.13	$ 0.13	$ 0.12
Earnings per share - Diluted (in dollars per share)	$ 0.07	$ 0.13	$ 0.13	$ 0.12
Weighted average common shares outstanding - Basic (in shares)	71,062,658	70,815,871	71,043,874	70,779,033
Weighted average common shares outstanding - Diluted (in shares)	71,958,314	72,041,688	72,094,323	72,107,056