Investment in ATC and ATC Holdco (Tables)

9 Months Ended

Sep. 30, 2024

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				Nine Months Ended
	September 30,				September 30,
(In thousands)	2024		2023		2024		2023
Equity earnings from investment in ATC	$	2,868	$	2,662	$	8,338	$	7,844
Dividends received from ATC		2,176		2,057		6,414		6,305
Capital contributions to ATC		894		1,075		2,679		3,033

ATC's summarized financial data is as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2024			2023			2024			2023
Operating revenues	$	221,434		$	206,197		$	651,584		$	610,399
Operating expenses		(110,043	)		(102,819	)		(324,082	)		(303,412	)
Other income, net		355			701			898			1,657
Interest expense, net		(36,838	)		(33,555	)		(108,296	)		(99,969	)
Earnings before members' income taxes	$	74,908		$	70,524		$	220,104		$	208,675