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Business Description And Significant Accounting Policies: Property, Plant and Equipment (AFUDC) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Interest expense incurred net of amounts capitalized (including amortization of debt issuance costs, premiums and discounts) |  |  |
AFUDC Borrowed | $ 5,638 | $ 4,068 | $ 5,617
Other Nonoperating Income (Expense) |  |  |
AFUDC Equity | $ 644 | $ 593 | $ 318

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