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Selected Balance Sheet Information: Materials, Supplies, and Fuel Schedule (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Selected Balance Sheet Information [Abstract] |  |
Materials and supplies | $ 102,328 | $ 99,734
Fuel - Electric Utilities | 6,808 | 3,115
Natural gas in storage | 20,824 | 104,572
Total materials, supplies and fuel | $ 129,960 | $ 207,421

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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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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