Fair Value of Financial Instruments (Details-2) - USD ($) $ in Thousands	Sep. 30, 2022		Dec. 31, 2021
Assets:
Collateral posted against derivative positions	$ 0		$ 1,300
Recurring [Member]
Assets:
Derivative assets, net	9,827	[1]	3,606	[2]
Exchange-traded investments	1,504		1,296
Total Assets	11,331		4,902
Liabilities:
Derivative liabilities, net	4,614	[1]	2,989
Deferred compensation	3,782		3,653
Total liabilities	8,396		6,642
Recurring [Member] | Level 1 [Member]
Assets:
Derivative assets, net	5,446	[1]	1,170	[2]
Exchange-traded investments	1,504		1,296
Total Assets	6,950		2,466
Liabilities:
Derivative liabilities, net	4,087	[1]	731
Deferred compensation	0		0
Total liabilities	4,087		731
Recurring [Member] | Level 2 [Member]
Assets:
Derivative assets, net	0	[1]	0	[2]
Exchange-traded investments	0		0
Total Assets	0		0
Liabilities:
Derivative liabilities, net	0	[1]	0
Deferred compensation	3,782		3,653
Total liabilities	3,782		3,653
Recurring [Member] | Level 3 [Member]
Assets:
Derivative assets, net	4,381	[1]	2,436	[2]
Exchange-traded investments	0		0
Total Assets	4,381		2,436
Liabilities:
Derivative liabilities, net	527	[1]	2,258
Deferred compensation	0		0
Total liabilities	527		2,258
MGE [Member] | Recurring [Member]
Assets:
Derivative assets, net	9,827	[1]	3,606	[2]
Exchange-traded investments	99		230
Total Assets	9,926		3,836
Liabilities:
Derivative liabilities, net	4,614	[1]	2,989
Deferred compensation	3,782		3,653
Total liabilities	8,396		6,642
MGE [Member] | Recurring [Member] | Level 1 [Member]
Assets:
Derivative assets, net	5,446	[1]	1,170	[2]
Exchange-traded investments	99		230
Total Assets	5,545		1,400
Liabilities:
Derivative liabilities, net	4,087	[1]	731
Deferred compensation	0		0
Total liabilities	4,087		731
MGE [Member] | Recurring [Member] | Level 2 [Member]
Assets:
Derivative assets, net	0	[1]	0	[2]
Exchange-traded investments	0		0
Total Assets	0		0
Liabilities:
Derivative liabilities, net	0	[1]	0
Deferred compensation	3,782		3,653
Total liabilities	3,782		3,653
MGE [Member] | Recurring [Member] | Level 3 [Member]
Assets:
Derivative assets, net	4,381	[1]	2,436	[2]
Exchange-traded investments	0		0
Total Assets	4,381		2,436
Liabilities:
Derivative liabilities, net	527	[1]	2,258
Deferred compensation	0		0
Total liabilities	$ 527		$ 2,258

[1] No collateral was posted against derivative positions as of September 30, 2022.

[2] As of December 31, 2021 MGE received collateral of $1.3 million from counterparties under a master netting agreement for outstanding exchange traded derivative positions. The fair value of the derivative asset disclosed in this table has not been reduced for the collateral received.