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Business Segment Information: Segment Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Segment Reporting, Asset Reconciling Item |  |
Total Assets | $ 9,131,896 | $ 8,088,786
Corporate, Non-Segment |  |
Segment Reporting, Asset Reconciling Item |  |
Total Assets | 88,864 | 110,349
Electric Utilities |  |
Segment Reporting, Asset Reconciling Item |  |
Total Assets | 3,796,662 | 3,602,233
Gas Utilities |  |
Segment Reporting, Asset Reconciling Item |  |
Total Assets | $ 5,246,370 | $ 4,376,204

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. 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