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Consolidated Statement of Equity - USD ($)
$ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total Stockholders' Equity - PrimeEnergy [Member]
Non-Controlling Interest [Member]
Balance at Dec. 31, 2016 $ 65,880 $ 383 $ 8,313 $ 96,322 $ (46,473) $ 58,545 $ 7,335
Balance, shares at Dec. 31, 2016   3,836,397          
Repurchase of common stock (4,605)       (4,605) (4,605)  
Net income 28,184     22,659   22,659 5,525
Purchase of Non-controlling Interest (61)   126     126 (187)
Balance at Jun. 30, 2017 89,398 $ 383 8,439 118,981 (51,078) 76,725 12,673
Balance, shares at Jun. 30, 2017   3,836,397          
Balance at Dec. 31, 2017 $ 102,439 $ 383 8,729 138,320 (52,123) 95,309 7,130
Balance, shares at Dec. 31, 2017 3,836,397 3,836,397          
Repurchase of common stock $ (3,696)       (3,696) (3,696)  
Net income 2,704     2,726   2,726 (22)
Purchase of Non-controlling Interest (10)   43     43 (53)
Balance at Jun. 30, 2018 $ 101,437 $ 383 $ 8,772 $ 141,046 $ (55,819) $ 94,382 $ 7,055
Balance, shares at Jun. 30, 2018 3,836,397 3,836,397