Selected Balance Sheet Information: Materials and Supplies (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Dec. 31, 2019 |
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| Selected Balance Sheet Information [Abstract] | ||
| Materials and supplies | $ 93,069 | $ 82,809 |
| Fuel - Electric Utilities | 1,745 | 2,425 |
| Natural gas in storage | 31,544 | 31,938 |
| Total materials, supplies and fuel | $ 126,358 | $ 117,172 |
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- Definition Selected Balance Sheet Information [Abstract] No definition available.
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- Definition Carrying amount as of the balance sheet date of natural gas in storage, which is a mixture of gases (liquefied or otherwise), used for fuel and manufacturing purposes, which is ready for sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of fossil fuel included in inventory classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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