Investment in ATC and ATC Holdco (Tables)

3 Months Ended

Mar. 31, 2025

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments Financial Data

MGE Transco recorded the following amounts related to its investment in ATC:

	Three Months Ended
	March 31,
(In thousands)	2025		2024
Equity earnings from investment in ATC	$	2,990	$	2,722
Dividends received from ATC		3,287		2,106
Capital contributions to ATC		2,492		715

ATC's summarized financial data is as follows:

	Three Months Ended
	March 31,
(In thousands)	2025			2024
Operating revenues	$	234,929		$	211,928
Operating expenses		(116,745	)		(104,842	)
Other income, net		83			187
Interest expense, net		(39,193	)		(35,418	)
Earnings before members' income taxes	$	79,074		$	71,855