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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Income Statement [Abstract] |  |  |  |
OPERATING REVENUES (Note 4) | $ 1,455,749 | $ 1,358,751 | $ 2,605,346 | $ 2,391,031
OPERATING EXPENSES |  |  |  |
Fuel and purchased power | 558,498 | 477,008 | 995,227 | 857,079
Operations and maintenance | 283,387 | 286,605 | 560,087 | 586,714
Depreciation and amortization | 243,226 | 228,893 | 483,084 | 463,833
Taxes other than income taxes | 61,684 | 57,651 | 123,656 | 117,005
Other expense | 3,282 | 1,042 | 6,446 | 1,626
Total | 1,150,077 | 1,051,199 | 2,168,500 | 2,026,257
OPERATING INCOME | 305,672 | 307,552 | 436,846 | 364,774
OTHER INCOME (DEDUCTIONS) |  |  |  |
Allowance for equity funds used during construction | 17,052 | 14,767 | 31,834 | 28,016
Pension and other postretirement non-service credits, net (Note 8) | 5,018 | 3,692 | 9,000 | 6,650
Other income (Note 12) | 13,096 | 12,104 | 18,077 | 29,565
Other expense (Note 12) | (6,570) | (4,259) | (9,310) | (6,829)
Total | 28,596 | 26,304 | 49,601 | 57,402
INTEREST EXPENSE |  |  |  |
Interest charges | 133,601 | 113,527 | 259,360 | 218,470
Allowance for borrowed funds used during construction | (11,402) | (11,559) | (21,265) | (21,661)
Total | 122,199 | 101,968 | 238,095 | 196,809
Income Before Income Taxes | 212,069 | 231,888 | 248,352 | 225,367
Income taxes | 31,302 | 35,018 | 32,471 | 28,835
Net Income | 180,767 | 196,870 | 215,881 | 196,532
Less: Net income attributable to noncontrolling interests (Note 9) | 2,193 | 4,306 | 4,387 | 8,612
Net income attributable to common shareholders, basic | 178,574 | 192,564 | 211,494 | 187,920
Net income attributable to common shareholders, diluted | $ 178,574 | $ 192,564 | $ 211,494 | $ 187,920
Weighted average common shares outstanding — basic (in shares) | 121,306 | 119,517 | 121,333 | 119,555
Weighted-average common shares outstanding — diluted (in shares) | 124,494 | 121,865 | 124,136 | 121,813
Earnings Per Weighted-Average Common Share Outstanding |  |  |  |
Net income attributable to common shareholders — basic (in dollars per share) | $ 1.47 | $ 1.61 | $ 1.74 | $ 1.57
Net income attributable to common shareholders — diluted (in dollars per share) | $ 1.43 | $ 1.58 | $ 1.70 | $ 1.54

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