Investment in ATC and ATC Holdco (Tables)

3 Months Ended

Mar. 31, 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
		March 31,
(In thousands)		2020		2019
Equity earnings from investment in ATC	$	2,266	$	2,218
Dividends from ATC		2,391		2,012
Capital contributions to ATC		178		178

ATC's summarized financial data is as follows:

		Three Months Ended
		March 31,
(In thousands)		2020		2019
Operating revenues	$	186,801	$	177,715
Operating expenses		(95,211)		(90,387)
Other income, net		375		260
Interest expense, net		(28,888)		(29,118)
Earnings before members' income taxes	$	63,077	$	58,470