Investment in ATC and ATC Holdco (Tables)

9 Months Ended

Sep. 30, 2022

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)	2022		2021		2022		2021
Equity earnings from investment in ATC	$	1,473	$	2,500	$	6,543	$	7,333
Dividends received from ATC		2,005		1,942		5,964		5,842
Capital contributions to ATC		536		—		2,319		—

ATC's summarized financial data is as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In thousands)	2022			2021			2022			2021
Operating revenues	$	169,779		$	186,785		$	552,383		$	561,379
Operating expenses		(97,629	)		(91,340	)		(288,376	)		(278,828	)
Other income, net		272			123			1,020			1,164
Interest expense, net		(34,794	)		(28,674	)		(92,293	)		(86,337	)
Earnings before members' income taxes	$	37,628		$	66,894		$	172,734		$	197,378