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Significant Accounting Policies, Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2017
Income Taxes [Abstract] |  |  |
Deferred investment tax credits | $ 356 | $ 392 |
Federal corporate tax rate | 21.00% | 21.00% | 34.00%
IRS TPR Catch-Up Deduction [Member] |  |  |
Income Taxes [Abstract] |  |  |
Approved amortization period | 15 years |  |

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