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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Schedule Of Performance Goals |
Metric 1 – Company’s total shareholder return (“TSR”) compared to the TSR for a specific peer group of investor-owned utilities (a market-based condition) | 40.00%
Metric 2 – Achievement of a three-year average return on equity target (a performance-based condition) | 30.00%
Metric 3 – Achievement of a consolidated operations and maintenance expense target over a three-year measurement period (a performance-based condition) | 30.00%
Summary Of PSU Transactions |
|  |  | Number |  | Weighted
|  |  | of |  | Average
|  |  | Share Units |  | Fair Value
Nonvested share units at beginning of period |  |  | 563,656 |  | $ | 38.61
Granted |  |  | 195,300 |  | $ | 34.25
Performance criteria adjustment |  |  | (23,220) |  | $ | 37.00
Share units issued |  |  | (103,775) |  | $ | 42.77
Forfeited |  |  | (15,094) |  | $ | 37.89
Nonvested share units at end of period |  |  | 616,867 |  | $ | 36.61
Summary Of RSU Transactions |
|  |  | Number |  | Weighted
|  |  | of |  | Average
|  |  | Stock Units |  | Fair Value
Nonvested stock units at beginning of period |  |  | 210,249 |  | $ | 41.40
Granted |  |  | 156,225 |  | $ | 35.54
Actual vested |  |  | (57,496) |  | $ | 44.53
Forfeited |  |  | (7,796) |  | $ | 37.69
Nonvested stock units at end of period |  |  | 301,182 |  | $ | 37.52
Summary Of Stock Option Transactions |
|  |  |  | Weighted |  | Weighted |  |  |
|  |  |  | Average |  | Average |  | Aggregate
|  |  |  | Exercise |  | Remaining |  | Intrinsic
|  | Shares |  | Price |  | Life (years) |  | Value
Outstanding at beginning of period |  | 906,902 |  | $ | 36.87 |  |  |  |  |
Granted |  | 197,684 |  | $ | 35.33 |  |  |  |  |
Forfeited |  | (6,566) |  | $ | 36.16 |  |  |  |  |
Expired |  | (1,396) |  | $ | 41.15 |  |  |  |  |
Exercised |  | (14,408) |  | $ | 35.33 |  |  |  |  |
Outstanding at end of period |  | 1,082,216 |  | $ | 36.61 |  | 5.2 |  | $ | 4,283
Exercisable at end of period |  | 797,009 |  | $ | 36.76 |  | 3.9 |  | $ | 3,109
Summary Of Restricted Stock Transactions |
|  | Number |  | Weighted
|  | of |  | Average
|  | Stock Awards |  | Fair Value
Nonvested stock awards at beginning of period |  | - |  | $ | -
Granted |  | 21,648 |  |  | 37.42
Vested |  | (21,648) |  |  | 37.42
Nonvested stock awards at end of period |  | - |  | $ | -
Performance Share Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Compensation Costs |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock-based compensation within operations and maintenance expenses |  | $ | 2,487 |  | $ | 986 |  | $ | 5,734 |  | $ | 2,174
Income tax benefit |  | $ | 629 |  | $ | 248 |  | $ | 1,450 |  | $ | 545
Assumptions Used In The Pricing Model |
| 2025
Expected term (years) | 3
Risk-free interest rate | 4.19%
Expected volatility | 23.20%
Restricted Stock Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Compensation Costs |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock-based compensation within operations and maintenance expenses |  | $ | 1,317 |  | $ | 508 |  | $ | 3,845 |  | $ | 2,078
Income tax benefit |  | $ | 334 |  | $ | 128 |  | $ | 973 |  | $ | 521
Stock Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Compensation Costs |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock-based compensation within operations and maintenance expenses |  | $ | 308 |  | $ | 32 |  | $ | 1,417 |  | $ | 233
Income tax benefit |  | $ | 77 |  | $ | 8 |  | $ | 356 |  | $ | 58
Assumptions Used In The Pricing Model |
| 2025
Expected term (years) |  | 5.54
Risk-free interest rate |  | 4.22%
Expected volatility |  | 28.50%
Dividend yield |  | 3.69%
Grant date fair value per option | $ | 7.95
Restricted Stock [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Compensation Costs |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock-based compensation within operations and maintenance expenses |  | $ | 13 |  | $ | 13 |  | $ | 37 |  | $ | 37
Income tax benefit |  | $ | 4 |  | $ | 3 |  | $ | 10 |  | $ | 10
Stock Awards [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary Of Compensation Costs |
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock-based compensation within operations and maintenance expenses |  | $ | 810 |  | $ | - |  | $ | 810 |  | $ | 840
Income tax benefit |  | $ | 221 |  | $ | - |  | $ | 221 |  | $ | 233

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