CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating revenues
Oil and gas sales	$ 32,879	$ 30,819
Transportation revenue	1,323
Total revenues	34,202	30,819
Operating expenses
Lease operating expense and taxes	9,502	9,796
Depreciation, depletion and amortization	10,354	11,570
Transportation expenses	565
General and administrative	3,966	4,317
Total operating expenses	24,387	25,683
Income from operations	9,815	5,136
Other income (expense)
Interest and other income	134	15
Interest expense	(754)	(750)
Loss on derivative financial instruments	(993)	(1,565)
Total other expense	(1,613)	(2,300)
Income before taxes	8,202	2,836
Deferred income tax expense (benefit)	(8)	7
Net income	8,210	2,829
Less dividends on preferred shares	3	3
Net income applicable to common stockholders	$ 8,207	$ 2,826
Earnings per share - Basic (in dollars per share)	$ 0.11	$ 0.04
Earnings per share - Diluted (in dollars per share)	$ 0.11	$ 0.04
Weighted average common shares outstanding - Basic (in shares)	73,104,129	71,991,863
Weighted average common shares outstanding - Diluted (in shares)	73,215,840	72,685,439