Investment in ATC and ATC Holdco (Tables)

9 Months Ended

Sep. 30, 2020

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments Financial Data

MGE Transco and MGEE Transco have accounted for their investments in ATC and ATC Holdco, respectively, under the equity method of accounting. Equity earnings from investments are recorded as "Other income" on the consolidated statements of income of MGE Energy. MGE Transco recorded the following amounts related to its investment in ATC:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
(In thousands)		2020		2019		2020		2019
Equity earnings from investment in ATC	$	2,319	$	2,364	$	7,724	$	6,879
Dividends from investments		2,349		1,781		6,620		5,526
Capital contributions to ATC		359		888		892		2,131

ATC's summarized financial data is as follows:

		Three Months Ended				Nine Months Ended
		September 30,				September 30,
(In thousands)		2020		2019		2020		2019
Operating revenues	$	187,833	$	184,833	$	577,705	$	544,760
Operating expenses		(92,975)		(94,713)		(285,697)		(278,673)
Other income, net		643		484		1,924		1,031
Interest expense, net		(28,801)		(29,165)		(83,947)		(87,121)
Earnings before members' income taxes	$	66,700	$	61,439	$	209,985	$	179,997