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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 30, 2024
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Taxes        
Income tax benefits   $ 14,698 $ 15,206 $ 8,441
Income tax benefit   106,726 110,529 76,912
Interest expense to be received on the underpayment of income taxes   2,800    
Decrease in deferred income taxes due to regulation adoption   27,900    
APS        
Income Taxes        
Income tax benefits   11,254 12,110 5,460
Income tax benefit   125,919 $ 126,993 $ 94,184
Decrease in deferred income taxes due to regulation adoption   12,400    
Federal        
Income Taxes        
State credit carryforwards net of federal benefit   27,900    
Federal | APS        
Income Taxes        
State credit carryforwards net of federal benefit   12,400    
Tax Year 2024        
Income Taxes        
Income tax benefits   33,400    
Tax Year 2025        
Income Taxes        
Income tax benefits   39,600    
Variable Interest Entity, Not Primary Beneficiary | Palo Verde sale leaseback        
Income Taxes        
Income tax benefit   $ 0    
Discontinued Operations, Disposed of by Sale | Bright Canyou Energy Corportion        
Income Taxes        
Investment tax credits $ 23,000      
Payments to acquire investment tax credits $ 21,000