| Financial Data |
September 30, 2025 | December 31, 2024 |
| Total Operating Revenues (000s) |
$1,407,754 | $1,826,633 |
| Net Income (000s) |
$279,865 | $289,174 |
| Earnings Per Common Share (diluted) |
$5.13 | $5.50 |
| Dividends Declared Per Common Share |
$2.58 | $3.35 |
| Book Value Per Common Share |
$64.41 | $61.73 |
| Stock Price - Closing at end of period (2025 Range - High-$138,03, Low-$104,74) |
$132.15 | $109.28 |
| Number of Customers |
660,542 | 649,205 |
| Weighted Average Diluted Shares Outstanding (000s) |
54,522 | 52,615 |
| Common Stock Ticker Symbol |
IDA | |