v3.25.1
CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Income Statement [Abstract]    
OPERATING REVENUES (Note 4) $ 1,032,280 $ 951,712
OPERATING EXPENSES    
Fuel and purchased power 380,071 357,864
Operations and maintenance 300,109 257,578
Depreciation and amortization 234,940 210,294
Taxes other than income taxes 59,354 59,164
Other expense 584 20
Total 975,058 884,920
OPERATING INCOME 57,222 66,792
OTHER INCOME (DEDUCTIONS)    
Allowance for equity funds used during construction 13,249 10,292
Pension and other postretirement non-service credits - net (Note 7) 2,958 11,568
Other income (Note 11) 17,461 30,607
Other expense (Note 11) (2,570) (7,567)
Total 31,098 44,900
INTEREST EXPENSE    
Interest charges 104,943 99,774
Allowance for borrowed funds used during construction (10,102) (13,141)
Total 94,841 86,633
Income (Loss) Before Income Taxes (6,521) 25,059
Income taxes (benefit) (6,183) 3,891
Net Income (Loss) (338) 21,168
Less: Net income attributable to noncontrolling interests (Note 8) 4,306 4,306
Net Income (Loss) Attributable to Common Shareholders $ (4,644) $ 16,862
Weighted-average common shares outstanding - basic (in shares) 119,594 113,621
Weighted-average common shares outstanding - diluted (in shares) 119,594 114,227
Earnings Per Weighted-Average Common Share Outstanding    
Net income (loss) attributable to common shareholders - basic (in dollars per share) $ (0.04) $ 0.15
Net income (loss) attributable to common shareholders - diluted (in dollars per share) $ (0.04) $ 0.15