v3.26.1
CONSOLIDATED STATEMENTS OF INCOME - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Operating revenue:        
Electric $ 1,015,155 $ 832,355 $ 2,275,734 $ 1,859,303
Natural gas 287,903 270,370 867,053 835,297
Other 9,746 17,740 18,274 27,868
Total operating revenue 1,312,804 1,120,465 3,161,061 2,722,468
Energy costs:        
Purchased electricity 429,427 276,118 984,942 657,646
Electric generation fuel 22,254 71,608 46,894 163,232
Residential exchange (15,718) (17,367) (38,431) (44,601)
Purchased natural gas 102,598 97,484 334,585 343,999
Utility operations and maintenance 230,766 207,957 505,587 440,342
Non-utility expense and other 8,289 17,414 21,042 32,741
Depreciation and amortization 212,665 209,536 425,028 419,912
Conservation amortization 46,270 36,307 103,415 84,187
Taxes other than income taxes 118,247 96,990 283,759 239,711
Total operating expenses 1,154,798 996,047 2,666,821 2,337,169
Operating income (loss) 158,006 124,418 494,240 385,299
Other income (expense):        
Other income 34,986 39,047 64,836 72,311
Other expense (6,338) (14,936) (7,412) (18,452)
Interest charges:        
AFUDC 8,030 10,911 14,848 20,998
Interest expense (134,603) (116,201) (257,870) (228,863)
Income (loss) before income taxes 60,081 43,239 308,642 231,293
Income tax (benefit) expense 10,382 (935) 36,111 19,563
Net income (loss) 49,699 44,174 272,531 211,730
Subsidiaries        
Operating revenue:        
Electric 1,015,155 832,355 2,275,734 1,859,303
Natural gas 288,704 271,283 868,525 837,256
Other 57 7,334 175 7,433
Total operating revenue 1,303,916 1,110,972 3,144,434 2,703,992
Energy costs:        
Purchased electricity 429,427 276,118 984,942 657,646
Electric generation fuel 22,254 71,608 46,894 163,232
Residential exchange (15,718) (17,367) (38,431) (44,601)
Purchased natural gas 102,598 97,484 334,585 343,999
Utility operations and maintenance 230,766 207,957 505,587 440,342
Non-utility expense and other 4,192 10,470 9,818 19,245
Depreciation and amortization 210,996 207,852 421,684 416,545
Conservation amortization 46,270 36,307 103,415 84,187
Taxes other than income taxes 116,202 95,105 278,479 236,605
Total operating expenses 1,146,987 985,534 2,646,973 2,317,200
Operating income (loss) 156,929 125,438 497,461 386,792
Other income (expense):        
Other income 29,894 35,951 58,795 66,775
Other expense (6,336) (14,933) (7,412) (18,449)
Interest charges:        
AFUDC 8,030 10,911 14,848 20,998
Interest expense (92,257) (84,637) (183,141) (169,557)
Income (loss) before income taxes 96,260 72,730 380,551 286,559
Income tax (benefit) expense 16,515 4,410 54,368 32,225
Net income (loss) $ 79,745 $ 68,320 $ 326,183 $ 254,334