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Capitalization (Tables) | 12 Months Ended
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Dec. 31, 2022
Capitalization [Abstract] |
Schedule of long-term debt |
Year |  | (Millions of Dollars) Annual Maturities |
2023 |  | $ | 17.5 |
2024 |  | $ | 7.4 |
2025 |  | $ | 6.9 |
2026 |  | $ | 6.7 |
2027 |  | $ | 6.4 |
Thereafter |  | $ | 261.5 |
Schedule of basic and diluted earnings per share |
|  | (In Thousands, Except Per Share Amounts) |
|  | 2022 |  |  | 2021 |  |  | 2020 |  |  |  |
Basic: |  | Income |  |  | Shares |  |  | Income |  |  | Shares |  |  | Income |  |  | Shares |
Net Income |  | $ | 42,429 |  |  |  | 17,597 |  |  | $ | 36,543 |  |  |  | 17,492 |  |  | $ | 38,425 |  |  |  | 17,459 |
Preferred Dividend |  |  | (120 | ) |  |  |  |  |  |  | (120 | ) |  |  |  |  |  |  | (120 | ) |  |  |  |
Earnings Applicable to Common Stock |  | $ | 42,309 |  |  |  | 17,597 |  |  | $ | 36,423 |  |  |  | 17,492 |  |  | $ | 38,305 |  |  |  | 17,459 |
Basic EPS |  | $ | 2.40 |  |  |  |  |  |  | $ | 2.08 |  |  |  |  |  |  | $ | 2.19 |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Earnings Applicable to Common Stock |  | $ | 42,309 |  |  |  | 17,597 |  |  | $ | 36,423 |  |  |  | 17,492 |  |  | $ | 38,305 |  |  |  | 17,459 |
$7.00 Series Dividend |  |  | 67 |  |  |  | 115 |  |  |  | 67 |  |  |  | 115 |  |  |  | 67 |  |  |  | 115 |
Adjusted Earnings Applicable to Common Stock |  | $ | 42,376 |  |  |  | 17,712 |  |  | $ | 36,490 |  |  |  | 17,607 |  |  | $ | 38,372 |  |  |  | 17,574 |
Diluted EPS |  | $ | 2.39 |  |  |  |  |  |  | $ | 2.07 |  |  |  |  |  |  | $ | 2.18 |  |  |  |  |
Schedule of carrying amount and fair value of the bonds |
|  | (Thousands of Dollars) |
|  | At December 31, |
|  | 2022 |  |  | 2021 |
|  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
|  | Amount |  |  | Value |  |  | Amount |  |  | Value |
FMBs |  | $ | 147,269 |  |  | $ | 138,756 |  |  | $ | 98,828 |  |  | $ | 107,781 |

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