Investment in ATC and ATC Holdco (Tables)

3 Months Ended

Mar. 31, 2017

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 31,2017 and 2016, MGE Transco recorded the following:

		Three Months Ended
		March 31,
(In thousands)		2017		2016
Equity earnings from investment in ATC	$	2,608	$	2,233
Dividends from ATC(a)		-		865
Capital contributions to ATC		1,420		533

(a)As of December 31, 2016, MGE Transco recorded a $2.1 million receivable from ATC for a cash dividend received in January 2017.

ATC's summarized financial data for the three months endedMarch 31,2017 and 2016, is as follows:

		Three Months Ended
		March 31,
(In thousands)		2017		2016
Operating revenues	$	174,669	$	164,240
Operating expenses		(82,388)		(79,065)
Other income, net		207		127
Interest expense, net		(26,616)		(24,208)
Earnings before members' income taxes	$	65,872	$	61,094