Consolidated Statements of Operations Information: Years Ended December 31, 2017 2016 2015 2014 2013 (In thousands, except per share data) Revenues and other income: Oil and gas revenue . . . . . . . . . . . . . . . . . . . $ 578,139 $ 310,377 $ 446,696 $ 855,877 $851,212 Gain on sale of assets . . . . . . . . . . . . . . . . . . — — 24,651 23,769 — Other income, net . . . . . . . . . . . . . . . . . . . . 58,697 74,978 209 3,092 941 Total revenues and other income . . . . . . . . . 636,836 385,355 471,556 882,738 852,153 Costs and expenses: Oil and gas production . . . . . . . . . . . . . . . . . 126,850 119,367 105,336 100,122 96,791 Facilities insurance modifications, net . . . . . . . (820) 14,961 — — — Exploration expenses . . . . . . . . . . . . . . . . . . . 216,050 202,280 156,203 93,519 230,314 General and administrative . . . . . . . . . . . . . . 68,302 87,623 136,809 135,231 158,421 Depletion and depreciation . . . . . . . . . . . . . . 255,203 140,404 155,966 198,080 222,544 Interest and other financing costs, net . . . . . . . 77,595 44,147 37,209 45,548 47,590 Derivatives, net . . . . . . . . . . . . . . . . . . . . . . 59,968 48,021 (210,649) (281,853) 17,027 Restructuring charges . . . . . . . . . . . . . . . . . . — — — 11,742 — Loss on equity method investment . . . . . . . . . 6,252 — — — — Other expenses, net . . . . . . . . . . . . . . . . . . . 5,291 23,116 5,246 2,081 3,512 Total costs and expenses . . . . . . . . . . . . . . . 814,691 679,919 386,120 304,470 776,199 Income (loss) before income taxes . . . . . . . . . . . (177,855) (294,564) 85,436 578,268 75,954 Income tax expense (benefit) . . . . . . . . . . . . . 44,937 (10,784) 155,272 298,898 166,998 Net income (loss) . . . . . . . . . . . . . . . . . . . . . . $(222,792) $(283,780) $ (69,836) $ 279,370 $(91,044) Net income (loss) per share: Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.57) $ (0.74) $ (0.18) $ 0.73 $ (0.24) Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . $ (0.57) $ (0.74) $ (0.18) $ 0.72 $ (0.24) Weighted average number of shares used to compute net income (loss) per share: Basic . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388,375 385,402 382,610 379,195 376,819 Diluted . . . . . . . . . . . . . . . . . . . . . . . . . . 388,375 385,402 382,610 386,119 376,819 76