Investment in ATC and ATC Holdco (Tables)

9 Months Ended

Sep. 30, 2023

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)	2023		2022		2023		2022
Equity earnings from investment in ATC	$	2,662	$	1,473	$	7,844	$	6,543
Dividends received from ATC		2,057		2,005		6,305		5,964
Capital contributions to ATC		1,075		536		3,033		2,319

ATC's summarized financial data is as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2023			2022			2023			2022
Operating revenues	$	206,197		$	169,779		$	610,399		$	552,383
Operating expenses		(102,819	)		(97,629	)		(303,412	)		(288,376	)
Other income, net		701			272			1,657			1,020
Interest expense, net		(33,555	)		(34,794	)		(99,969	)		(92,293	)
Earnings before members' income taxes	$	70,524		$	37,628		$	208,675		$	172,734