Membership Interests (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Oct. 24, 2022	Sep. 30, 2022	Sep. 30, 2021	Oct. 25, 2022
Subsequent Event [Line Items]
Cash restricted for distribution under the capital structure restriction		$ 1,318,000
Regulatory capitalization ratio, debt		57.50%
Regulatory capitalization ratio, equity		42.50%
Current regulatory capitalization ratio, debt		53.90%
Current regulatory capitalization ratio, equity		46.10%
Members contribution		$ 318,000	$ 188,000
Maximum [Member]
Subsequent Event [Line Items]
Regulatory capitalization ratio, debt		42.50%
Regulatory capitalization ratio, equity		45.00%
Minimum [Member]
Subsequent Event [Line Items]
Regulatory capitalization ratio, debt		57.50%
Regulatory capitalization ratio, equity		55.00%
Subsequent Event [Member]
Subsequent Event [Line Items]
Cash restricted for distribution under the capital structure restriction				$ 106,000
Members contribution	$ 106,000