Investment in ATC and ATC Holdco (Tables)

6 Months Ended

Jun. 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				Six Months Ended
		June 30,				June 30,
(In thousands)		2020		2019		2020		2019
Equity earnings from investment in ATC	$	3,139	$	2,297	$	5,405	$	4,515
Dividends from ATC		1,880		1,733		4,271		3,745
Capital contributions to ATC		355		1,065		533		1,243

ATC's summarized financial data is as follows:

		Three Months Ended				Six Months Ended
		June 30,				June 30,
(In thousands)		2020		2019		2020		2019
Operating revenues	$	203,071	$	182,212	$	389,872	$	359,927
Operating expenses		(97,511)		(93,573)		(192,722)		(183,960)
Other income, net		906		287		1,281		547
Interest expense, net		(26,258)		(28,838)		(55,146)		(57,956)
Earnings before members' income taxes	$	80,208	$	60,088	$	143,285	$	118,558