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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Revenues |  |  |  |
Oil and gas sales | $ 24,135 | $ 20,834 | $ 45,494 | $ 43,865
Realized gain (loss) on derivative instruments, net | (166) | 222 | 74 | 341
Field service income | 6,245 | 5,337 | 11,576 | 10,452
Administrative overhead fees | 2,540 | 2,110 | 4,657 | 4,274
Unrealized gain on derivative instruments, net | 4,480 | 8,877 | 2,397 | 5,098
Other income | 46 | 46 | 52 | 103
Total Revenues | 37,280 | 37,426 | 64,250 | 64,133
Costs and Expenses |  |  |  |
Lease operating expense | 10,996 | 9,973 | 20,979 | 19,473
Field service expense | 5,168 | 4,363 | 9,703 | 8,748
Depreciation, depletion, amortization and accretion on discounted liabilities | 6,269 | 7,124 | 11,152 | 13,962
General and administrative expense | 4,348 | 3,797 | 8,388 | 7,686
Exploration costs |  | 5 | 1 | 10
Total Costs and Expenses | 26,781 | 25,262 | 50,223 | 49,879
Gain on Sale and Exchange of Assets | 699 | 2 | 1,759 | 706
Income from Operations | 11,198 | 12,166 | 15,786 | 14,960
Other Income and Expenses |  |  |  |
Less: Interest expense | 1,085 | 831 | 2,158 | 1,587
Add: Interest income |  | 38 | 2 | 48
Income Before Provision for Income Taxes | 10,113 | 11,373 | 13,630 | 13,421
Provision for Income Taxes | 3,555 | 3,814 | 4,708 | 4,201
Net Income | 6,558 | 7,559 | 8,922 | 9,220
Less: Net Income Attributable to Non-Controlling Interests | 464 | 136 | 570 | 474
Net Income Attributable to PrimeEnergy | $ 6,094 | $ 7,423 | $ 8,352 | $ 8,746
Basic Income Per Common Share | $ 2.51 | $ 2.81 | $ 3.39 | $ 3.28
Diluted Income Per Common Share | $ 1.92 | $ 2.20 | $ 2.61 | $ 2.57

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