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v3.22.4

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenue: |  |  |
Revenue | $ 2,551,816 | $ 1,949,102 | $ 1,696,941
Operating expenses: |  |  |
Fuel, purchased power and cost of natural gas sold | 1,230,550 | 741,934 | 492,404
Operations and maintenance | 548,430 | 501,690 | 495,404
Depreciation, depletion and amortization | 250,909 | 235,953 | 224,457
Taxes - property and production | 66,683 | 60,096 | 56,373
Total operating expenses | 2,096,572 | 1,539,673 | 1,268,638
Operating income | 455,244 | 409,429 | 428,303
Other income (expense): |  |  |
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts) | (162,584) | (154,112) | (144,931)
Interest income | 1,595 | 1,708 | 1,461
Impairment of investment | 0 | 0 | (6,859)
Other income (expense), net | 1,708 | 1,404 | (2,293)
Total other income (expense) | (159,281) | (151,000) | (152,622)
Income before income taxes | 295,963 | 258,429 | 275,681
Income tax expense | (25,205) | (7,169) | (32,918)
Net income | 270,758 | 251,260 | 242,763
Net income attributable to non-controlling interest | (12,371) | (14,516) | (15,155)
Net income available for common stock | $ 258,387 | $ 236,744 | $ 227,608
Earnings per share of common stock: |  |  |
Earnings per share, Basic (usd per share) | $ 3.98 | $ 3.74 | $ 3.65
Earnings per share, Diluted (usd per share) | $ 3.97 | $ 3.74 | $ 3.65
Weighted average common shares outstanding: |  |  |
Basic (in shares) | 64,858 | 63,219 | 62,378
Diluted (in shares) | 65,021 | 63,325 | 62,439

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