| Schedule of Segment Financial Information |
| | | | | | | | | | | | | | | | | | | | | (in thousands) | | Electric utility | | All other | | Total | | Three months ended June 30, 2026 | | | | | | | | Revenues | | $ | 936,864 | | | $ | 2,839 | | | $ | 939,703 | | | Depreciation and amortization | | $ | 75,178 | | | $ | 188 | | | $ | 75,366 | | | Interest and dividend income | | $ | 2,713 | | | $ | 2,571 | | | $ | 5,284 | | | Interest expense, net | | $ | 45,351 | | | $ | 3,032 | | | $ | 48,383 | | Income (loss) before income taxes | | $ | 183,359 | | | $ | (18,697) | | | $ | 164,662 | | Income tax expense (benefit) | | 45,501 | | | (4,039) | | | 41,462 | | | | | | | | | | | | | | | | Net income (loss) for common stock | | $ | 137,858 | | | $ | (14,658) | | | $ | 123,200 | | | | | | | | | | Six months ended June 30, 2026 | | | | | | | | Revenues | | $ | 1,680,904 | | | $ | 5,246 | | | $ | 1,686,150 | | | | | | | | | | | | | | | | | Depreciation and amortization | | $ | 150,440 | | | $ | 373 | | | $ | 150,813 | | Interest and dividend income | | $ | 6,581 | | | $ | 8,698 | | | $ | 15,279 | | | Interest expense, net | | $ | 73,227 | | | $ | 6,284 | | | $ | 79,511 | | Income (loss) before income taxes | | $ | 228,403 | | | $ | (25,149) | | | $ | 203,254 | | Income tax expense (benefit) | | 55,202 | | | (5,598) | | | 49,604 | | | | | | | | | | | | | | | | Net income (loss) for common stock | | $ | 173,201 | | | $ | (19,551) | | | $ | 153,650 | | | Capital expenditures | | $ | 241,810 | | | $ | 280 | | | $ | 242,090 | | Total assets (at June 30, 2026) | | $ | 8,169,890 | | | $ | 231,912 | | | $ | 8,401,802 | | | | | | | | | | Three months ended June 30, 2025 | | | | | | | | | | | | | | | | | | | | | | Revenues | | $ | 742,482 | | | $ | 3,910 | | | $ | 746,392 | | | Depreciation and amortization | | $ | 73,631 | | | $ | 2,474 | | | $ | 76,105 | | | Interest income | | $ | 1,215 | | | $ | 6,364 | | | $ | 7,579 | | | Interest expense, net | | $ | 21,706 | | | $ | 5,550 | | | $ | 27,256 | | Income (loss) before income taxes | | $ | 50,269 | | | $ | (10,294) | | | $ | 39,975 | | Income taxes | | 10,620 | | | 2,797 | | | 13,417 | | Net income (loss) | | 39,649 | | | (13,091) | | | 26,558 | | | Preferred stock dividends of subsidiaries | | 499 | | | (26) | | | 473 | | Net income (loss) for common stock | | $ | 39,150 | | | $ | (13,065) | | | $ | 26,085 | | | | | | | | | | Six months ended June 30, 2025 | | | | | | | | | | | | | | | | | | | | | | Revenues | | $ | 1,480,848 | | | $ | 9,614 | | | $ | 1,490,462 | | | Depreciation and amortization | | $ | 147,184 | | | $ | 5,483 | | | $ | 152,667 | | | Interest income | | $ | 3,196 | | | $ | 17,006 | | | $ | 20,202 | | | Interest expense, net | | $ | 44,158 | | | $ | 17,310 | | | $ | 61,468 | | Income (loss) before income taxes | | $ | 111,788 | | | $ | (38,274) | | | $ | 73,514 | | Income tax expense (benefit) | | 23,824 | | | (4,012) | | | 19,812 | | Net income (loss) | | 87,964 | | | (34,262) | | | 53,702 | | | Preferred stock dividends of subsidiaries | | 998 | | | (52) | | | 946 | | Net income (loss) for common stock | | $ | 86,966 | | | $ | (34,210) | | | $ | 52,756 | | Capital expenditures | | $ | 159,950 | | | $ | 1,543 | | | $ | 161,493 | | Total assets (at December 31, 2025) | | $ | 8,530,520 | | | $ | 392,359 | | | $ | 8,922,879 | |
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