Assets Held for Sale and Dispositions (Narrative) (Details) $ in Thousands	Dec. 31, 2022 USD ($) customer	Oct. 31, 2023 USD ($)
West Virginia [Member] | Regulated Natural Gas Utility Assets [Member]
Discontinued Operations And Other Dispositions [Line Items]
Number of customers | customer	13,000
Percent of company's regulated natural gas customers	2.00%
Total purchase price	$ 39,965
Disposal Group, Not Discontinued Operations [Member]
Discontinued Operations And Other Dispositions [Line Items]
Consideration for sale of business unit		$ 165,000