Quarterly report pursuant to Section 13 or 15(d)

Oil and Natural Gas Properties (Unaudited Pro Forma Financial Information) (Details)

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Oil and Natural Gas Properties (Unaudited Pro Forma Financial Information) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Oil and Natural Gas Properties [Abstract]        
Revenues $ 48,035 $ 43,253 $ 142,040 $ 114,078
Income from operations 15,269 13,721 45,453 28,481
Income available to common stockholders $ 11,102 $ 766 $ 16,571 $ 2,477
Basic $ 0.19 $ 0.01 $ 0.30 $ 0.05
Diluted $ 0.19 $ 0.01 $ 0.29 $ 0.05