Investment in ATC and ATC Holdco (Tables)

3 Months Ended

Mar. 31, 2018

Equity Method Investments and Joint Ventures [Abstract]

Equity Method Investments Financial Data

MGE Transco and MGEE Transco have accounted for their investment in ATC and ATC Holdco, respectively, under the equity method of accounting.Equity earnings from investments are recorded as "Other income" on MGE Energy's consolidated statements of income. For the three months endedMarch 31,2018 and 2017, MGE Transco recorded the following:

		Three Months Ended
		March 31,
(In thousands)		2018		2017
Equity earnings from investment in ATC	$	2,451	$	2,608
Dividends from ATC(a)		-		-
Capital contributions to ATC		710		1,420

(a)MGE Transco recorded a $2.3 million and $2.1 million dividend receivable from ATC as of December 31, 2017 and 2016, respectively. A cash dividend was received in January of each of the proceeding years.

ATC's summarized financial data for the three months endedMarch 31,2018 and 2017, is as follows:

		Three Months Ended
		March 31,
(In thousands)		2018		2017
Operating revenues	$	165,429	$	174,669
Operating expenses		(84,893)		(82,697)
Other income, net		111		682
Interest expense, net		(27,762)		(26,783)
Earnings before members' income taxes	$	52,885	$	65,871