Derivatives And Hedging (Schedule Of Fair Value Of Derivative Instruments) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Derivatives, Fair Value [Line Items]
Total Derivatives in an asset position	$ 7,304	$ 441
Total Derivatives in a liability position	51,890	77,001
Natural Gas Future Contracts [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total Derivatives in an asset position	805	441
Natural Gas Future Contracts [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Derivatives in a liability position	51,890	76,000
Financial Transmission Rights [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Total Derivatives in an asset position	$ 6,499
Financial Transmission Rights [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Total Derivatives in a liability position		$ 1,001