Derivative and Hedging Instruments (Details-3) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024
Offsetting Liabilities [Line Items]
Collateral posted against derivative positions			$ (100)
Commodity Contract [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ 304	1,261
Gross amounts offset in balance sheet		(2,297)	(1,213)
Collateral posted against derivative positions		1,993	(48)
Net amount presented in balance sheet		0	0
Commodity Contract [Member] | Other Current Liabilities [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]		$ 1,121
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Other Liabilities, Current
Commodity Contract [Member] | Other Noncurrent Liabilities [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability	[1]		$ 140
Derivative Liability, Statement of Financial Position [Extensible Enumeration]			Other Liabilities, Noncurrent
Financial Transmission Rights [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		133
Gross amounts offset in balance sheet		0
Collateral posted against derivative positions		(133)
Net amount presented in balance sheet		$ 0
Derivative Liability, Statement of Financial Position [Extensible Enumeration]		Other Liabilities, Current
Financial Transmission Rights [Member] | Other Current Liabilities [Member]
Offsetting Liabilities [Line Items]
Derivative Liability, Fair Value, Gross Liability		$ 133

[1] As of March 31, 2025, MGE received collateral of $2.0 million from counterparties under a master netting agreement for outstanding exchange traded derivative positions on the consolidated balance sheets. As of December 31, 2024, collateral of less than $0.1 million was posted against and netted with derivative liability positions. The fair value of the derivatives disclosed in this table has not been adjusted for the collateral posted.