Stock-Based Compensation (Tables)
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9 Months Ended |
Sep. 30, 2024 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of PSU Transactions |
| | | | | | | | | | | | | | | | | Number | | Weighted | | | | of | | Average | | | | Share Units | | Fair Value | Nonvested share units at beginning of period | | | 531,437 | | $ | 40.03 | Granted | | | 227,284 | | | 38.10 | Performance criteria adjustment | | | (155,959) | | | 31.50 | Share units issued | | | (96,425) | | | 43.40 | Forfeited | | | (46,419) | | | 41.23 | Nonvested share units at end of period | | | 459,918 | | | 41.14 | | | | | | | |
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| Summary Of RSU Transactions |
| | | | | | | | | | | | | | | | | Number | | Weighted | | | | of | | Average | | | | Stock Units | | Fair Value | Nonvested stock units at beginning of period | | | 192,217 | | $ | 45.06 | Granted | | | 104,661 | | | 36.61 | Stock units vested and issued | | | (65,625) | | | 44.42 | Forfeited | | | (19,828) | | | 41.36 | Nonvested stock units at end of period | | | 211,425 | | | 41.40 |
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| Assumptions Used In The Pricing Model |
| | | | | | | 2024 | 2023 | | Expected term (years) | | 5.5 | | 5.5 | | Risk-free interest rate | | 4.00% | | 4.03% | | Expected volatility | | 28.30% | | 27.80% | | Dividend yield | | 3.43% | | 2.53% | | Grant date fair value per option | $ | 8.12 | $ | 11.37 | |
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| Summary Of Stock Option Transactions |
| | | | | | | | | | | | | | | | | | | | | | | | | | Weighted | | Weighted | | | | | | | | Average | | Average | | Aggregate | | | | | Exercise | | Remaining | | Intrinsic | | | Shares | | Price | | Life (years) | | Value | Outstanding at beginning of period | | 882,442 | | $ | 37.03 | | | | | | Granted | | 119,548 | | | 35.78 | | | | | | Forfeited | | (17,917) | | | 39.27 | | | | | | Expired | | (7,103) | | | 44.57 | | | | | | Exercised | | (15,383) | | | 34.94 | | | | | | Outstanding at end of period | | 961,587 | | $ | 36.81 | | 5.2 | | $ | 2,598 | | | | | | | | | | | | Exercisable at end of period | | 786,865 | | $ | 36.24 | | 4.5 | | $ | 2,296 |
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| Summary Of Restricted Stock Transactions |
| | | | | | | | Number | | Weighted | | | of | | Average | | | Shares | | Fair Value | Nonvested restricted stock at beginning of period | | 1,412 | | $ | 35.42 | Granted | | - | | | - | Vested | | - | | | - | Nonvested restricted stock at end of period | | 1,412 | | $ | 35.42 |
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| Performance Share Units [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of Compensation Costs |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | September 30, | | | 2024 | | 2023 | | 2024 | | 2023 | Stock-based compensation within operations and maintenance expenses | | $ | 986 | | $ | 1,039 | | $ | 2,174 | | $ | 5,444 | Income tax benefit | | | 248 | | | 260 | | | 545 | | | 1,364 |
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| Restricted Stock Units [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of Compensation Costs |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | September 30, | | | 2024 | | 2023 | | 2024 | | 2023 | Stock-based compensation within operations and maintenance expenses | | $ | 508 | | $ | 746 | | $ | 2,078 | | $ | 2,186 | Income tax benefit | | | 128 | | | 187 | | | 521 | | | 548 |
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| Stock Options [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of Compensation Costs |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | | September 30, | | | 2024 | | 2023 | | 2024 | | 2023 | Stock-based compensation within operations and maintenance expenses | | $ | 32 | | $ | 181 | | $ | 233 | | $ | 480 | Income tax benefit | | | 8 | | | 45 | | | 58 | | | 120 | | | | | | | | | | | | | |
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| Restricted Stock [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of Compensation Costs |
| | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | September 30, | | | 2024 | | 2023 | | 2024 | | 2023 | Stock-based compensation within operations and maintenance expenses | | $ | 13 | | $ | 12 | | $ | 37 | | $ | 37 | Income tax benefit | | | 3 | | | 3 | | | 10 | | | 10 |
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| Stock Awards [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary Of Compensation Costs |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Nine Months Ended | | | September 30, | | September 30, | | | 2024 | | 2023 | | 2024 | | 2023 | Stock-based compensation within operations and maintenance expenses | | $ | - | | $ | - | | $ | 840 | | $ | 780 | Income tax benefit | | | - | | | - | | | 233 | | | 219 |
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| Summary Of Nonvested Share Activity |
| | | | | | | | | | | | | | Number | | Weighted | | | of | | Average | | | Stock Awards | | Fair Value | Nonvested stock awards at beginning of period | | - | | $ | - | Granted | | 22,813 | | | 36.82 | Vested | | (22,813) | | | 36.82 | Nonvested stock awards at end of period | | - | | | - |
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