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CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
OPERATING REVENUES |  |  |  |
Operating revenues | $ 411,788 | $ 288,374 | $ 884,706 | $ 658,769
(Loss) gain on derivative instruments | (87,121) | 43,974 | (100,358) | 60,036
TOTAL OPERATING REVENUES | 324,667 | 332,348 | 784,348 | 718,805
OPERATING EXPENSES |  |  |  |
Direct operations | 16,154 | 17,423 | 33,030 | 34,667
Transportation and gathering | 133,488 | 135,249 | 270,190 | 278,581
Taxes other than income | 4,183 | 3,352 | 8,988 | 7,090
Exploration | 2,368 | 4,579 | 4,995 | 6,769
Depreciation, depletion and amortization | 91,549 | 94,622 | 185,697 | 194,757
General and administrative | 23,037 | 23,166 | 52,193 | 56,595
TOTAL OPERATING EXPENSES | 270,779 | 278,391 | 555,093 | 578,459
Loss on equity method investments | 0 | 0 | 0 | (59)
Gain (loss) on sale of assets | 20 | (241) | 91 | (170)
INCOME FROM OPERATIONS | 53,908 | 53,716 | 229,346 | 140,117
Interest expense, net | 12,558 | 14,543 | 24,935 | 28,754
Other expense | 46 | 48 | 92 | 114
Income before income taxes | 41,304 | 39,125 | 204,319 | 111,249
Income tax expense | 10,840 | 8,751 | 47,501 | 26,965
NET INCOME | $ 30,464 | $ 30,374 | $ 156,818 | $ 84,284
Earnings per share |  |  |  |
Basic (in dollars per share) | $ 0.08 | $ 0.08 | $ 0.39 | $ 0.21
Diluted (in dollars per share) | $ 0.08 | $ 0.08 | $ 0.39 | $ 0.21
Weighted-average common shares outstanding |  |  |  |
Basic (in shares) | 399,586 | 398,576 | 399,355 | 398,460
Diluted (in shares) | 402,206 | 401,279 | 401,740 | 400,219
Natural gas |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | $ 411,718 | $ 288,286 | $ 884,577 | $ 658,626
Other |  |  |  |
OPERATING REVENUES |  |  |  |
Operating revenues | $ 70 | $ 88 | $ 129 | $ 143

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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 23 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e62136-109447 + Details
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