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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Revenues: |  |  |
Total oil and gas sales | $ 1,850,730 | $ 858,195 | $ 768,689
Operating expenses: |  |  |
Production and ad valorem taxes | 49,141 | 36,967 | 35,702
Gathering and transportation | 130,940 | 106,582 | 71,303
Lease operating | 103,467 | 102,452 | 80,762
Depreciation, depletion and amortization | 469,388 | 417,112 | 276,526
General and administrative, net | 34,943 | 32,040 | 29,244
Exploration | 0 | 27 | 241
Loss (gain) on sale of assets | 162,077 | (17) | 25
Total operating expenses | 949,956 | 695,163 | 493,803
Operating income | 900,774 | 163,032 | 274,886
Other income (expenses): |  |  |
Gain (loss) from derivative financial instruments | (560,648) | 9,951 | 51,735
Other income | 636 | 1,080 | 622
Interest expense | (218,485) | (234,829) | (161,541)
Loss on early extinguishment of debt | (352,599) | (861) | 0
Transaction costs | 0 | 0 | (41,010)
Total other expenses | (1,131,096) | (224,659) | (150,194)
Income (loss) before income taxes | (230,322) | (61,627) | 124,692
Benefit from (provision for) income taxes | (11,403) | 9,210 | (27,803)
Net income (loss) | (241,725) | (52,417) | 96,889
Preferred stock dividends and accretion | (17,500) | (30,996) | (22,415)
Net income (loss) available to common stockholders | $ (259,225) | $ (83,413) | $ 74,474
Basic (in dollars per share) | $ (1.12) | $ (0.39) | $ 0.52
Diluted (in dollars per share) | $ (1.12) | $ (0.39) | $ 0.52
Weighted average shares outstanding: |  |  |
Basic (in shares) | 231,633 | 215,194 | 142,750
Diluted (in shares) | 231,633 | 215,194 | 187,378
Natural gas sales |  |  |
Revenues: |  |  |
Total oil and gas sales | $ 1,775,768 | $ 809,399 | $ 635,795
Oil sales |  |  |
Revenues: |  |  |
Total oil and gas sales | $ 74,962 | $ 48,796 | $ 132,894

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