v3.26.1
CHANGES IN ACCUMULATED OTHER COMPREHENSIVE INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]    
Balance at beginning of period $ 3,571,874  
Reclassifications 221 $ 169
Total IDACORP, Inc. shareholders’ equity 3,641,844 3,346,340
Balance at end of period 3,641,844 3,346,340
Reclassification out of Accumulated Other Comprehensive Income    
Amortization of prior service cost [1] 56 55
Amortization of net loss [1] 240 173
Total reclassification, before tax - pension and postretirement benefits 296 228
Tax benefit [2] (75) (59)
Reclassifications 221 169
Accumulated Defined Benefit Pension Items    
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]    
Balance at beginning of period (14,944) (13,592)
Other Comprehensive Income (Loss) before Reclassifications, Tax 0 229
Reclassifications 221 169
Total IDACORP, Inc. shareholders’ equity (14,723) (13,652)
Balance at end of period (14,723) (13,652)
Reclassification out of Accumulated Other Comprehensive Income    
Reclassifications $ 221 $ 169
[1] Amortization of these items is included in IDACORP's condensed consolidated statements of income in other operating expenses and in Idaho Power's condensed consolidated statements of income in other expense, net.
[2] The tax benefit is included in income tax expense in the condensed consolidated statements of income of both IDACORP and Idaho Power.