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Consolidated Statement Of Stockholders' Equity (USD $)
Common Stock [Member]
Additional Paid in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total Stockholders' Equity-PrimeEnergy [Member]
Non-Controlling Interest [Member]
Total
Balance at Dec. 31, 2010 $ 383,000 $ 5,955,000 $ 46,478,000 $ (28,896,000) $ 23,920,000 $ 9,167,000 $ 33,087,000
Balance, shares at Dec. 31, 2010 3,836,397           3,836,397
Purchase 49,994 shares of common stock       (1,179,000) (1,179,000)   (1,179,000)
Net income     821,000   821,000 941,000 1,762,000
Purchase of non-controlling interests   339,000     339,000 (508,000) (169,000)
Distributions to non-controlling interests           (70,000) (70,000)
Balance at Jun. 30, 2011 $ 383,000 $ 6,294,000 $ 47,299,000 $ (30,075,000) $ 23,901,000 $ 9,530,000 $ 33,431,000
Balance, shares at Jun. 30, 2011 3,836,397           3,836,397