Fair Value of Financial Instruments (Details-2) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023
Liabilities:
Derivative, right to reclaim collateral		$ 100	$ 5,400
Recurring [Member]
Assets:
Derivative assets, net	[1]	1,321	598
Exchange-traded investments			2,034
Total Assets			2,632
Liabilities:
Derivative liabilities, net	[1]	1,261	5,824
Deferred compensation		6,468	5,246
Total Liabilities		7,729	11,070
Recurring [Member] | Level 1 [Member]
Assets:
Derivative assets, net	[1]	987	352
Exchange-traded investments			2,034
Total Assets			2,386
Liabilities:
Derivative liabilities, net	[1]	480	2,974
Deferred compensation		0	0
Total Liabilities		480	2,974
Recurring [Member] | Level 2 [Member]
Assets:
Derivative assets, net	[1]	0	0
Exchange-traded investments			0
Total Assets			0
Liabilities:
Derivative liabilities, net	[1]	0	0
Deferred compensation		6,468	5,246
Total Liabilities		6,468	5,246
Recurring [Member] | Level 3 [Member]
Assets:
Derivative assets, net	[1]	334	246
Exchange-traded investments			0
Total Assets			246
Liabilities:
Derivative liabilities, net	[1]	781	2,850
Deferred compensation		0	0
Total Liabilities		781	2,850
MGE [Member] | Recurring [Member]
Assets:
Derivative assets, net	[1]	1,321	598
Exchange-traded investments			60
Total Assets			658
Liabilities:
Derivative liabilities, net	[1]	1,261	5,824
Deferred compensation		6,468	5,246
Total Liabilities		7,729	11,070
MGE [Member] | Recurring [Member] | Level 1 [Member]
Assets:
Derivative assets, net	[1]	987	352
Exchange-traded investments			60
Total Assets			412
Liabilities:
Derivative liabilities, net	[1]	480	2,974
Deferred compensation		0	0
Total Liabilities		480	2,974
MGE [Member] | Recurring [Member] | Level 2 [Member]
Assets:
Derivative assets, net	[1]	0	0
Exchange-traded investments			0
Total Assets			0
Liabilities:
Derivative liabilities, net	[1]	0	0
Deferred compensation		6,468	5,246
Total Liabilities		6,468	5,246
MGE [Member] | Recurring [Member] | Level 3 [Member]
Assets:
Derivative assets, net	[1]	334	246
Exchange-traded investments			0
Total Assets			246
Liabilities:
Derivative liabilities, net	[1]	781	2,850
Deferred compensation		0	0
Total Liabilities		$ 781	$ 2,850

[1] As of December 31, 2024, and 2023, collateral of less than $0.1 million and $5.4 million, respectively, was posted against and netted with derivative liability positions on the consolidated balance sheets. The fair value of the derivative liability disclosed in this table has not been reduced for the collateral posted.