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CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
OPERATING REVENUES |  |  |  |
Operating revenues | $ 418,051 | $ 548,710 | $ 1,521,943 | $ 1,473,475
Gain (loss) on derivative instruments | 11,060 | (3,537) | 82,966 | (1,628)
TOTAL OPERATING REVENUES | 429,111 | 545,173 | 1,604,909 | 1,471,847
OPERATING EXPENSES |  |  |  |
Direct operations | 19,181 | 17,030 | 55,608 | 52,757
Taxes other than income | 4,607 | 2,852 | 14,094 | 15,434
Exploration | 4,481 | 10,049 | 15,029 | 68,166
Depreciation, depletion and amortization | 110,889 | 121,172 | 299,294 | 288,210
General and administrative | 18,391 | 20,724 | 72,370 | 66,013
TOTAL OPERATING EXPENSES | 303,230 | 394,766 | 881,098 | 1,024,865
Earnings (loss) on equity method investments | 3,860 | (11) | 11,194 | (1,009)
Gain (loss) on sale of assets | 36 | 25,655 | (1,464) | (14,850)
INCOME FROM OPERATIONS | 129,777 | 176,051 | 733,541 | 431,123
Interest expense, net | 13,554 | 14,191 | 40,302 | 57,577
Other expense | 143 | 115 | 430 | 347
Income before income taxes | 116,080 | 161,745 | 692,809 | 373,199
Income tax expense | 25,722 | 39,408 | 158,679 | 91,201
NET INCOME | $ 90,358 | $ 122,337 | $ 534,130 | $ 281,998
Earnings per share |  |  |  |
Basic (in dollars per share) | $ 0.22 | $ 0.28 | $ 1.27 | $ 0.63
Diluted (in dollars per share) | $ 0.22 | $ 0.28 | $ 1.27 | $ 0.62
Weighted-average common shares outstanding |  |  |  |
Basic (in shares) | 412,456 | 440,772 | 419,199 | 450,445
Diluted (in shares) | 414,462 | 443,110 | 421,101 | 452,313
Natural gas |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | $ 418,133 | $ 440,835 | $ 1,521,789 | $ 1,217,603
Crude oil and condensate |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | 0 | 0 | 0 | 48,722
Brokered natural gas |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | 0 | 105,849 | 0 | 203,375
OPERATING EXPENSES |  |  |  |
Operating expenses | 0 | 93,405 | 0 | 178,437
Other |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | (82) | 2,026 | 154 |
Transportation and gathering |  |  |  |
OPERATING EXPENSES |  |  |  |
Operating expenses | $ 145,681 | $ 129,534 | $ 424,703 | $ 355,848

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