Revenue (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Revenues disaggregated by revenue source were as follows:

		Three Months Ended
(In thousands)		March 31,
Electric revenues		2018		2017
Residential	$	33,259	$	33,353
Commercial(a)		47,452		50,164
Industrial		2,895		4,215
Other-retail/municipal		8,287		9,021
Total retail		91,893		96,753
Sales to the market		2,034		972
Other revenues		470		429
Adjustments to revenues		(6)		170
Total electric revenues		94,391		98,324
Gas revenues
Residential		36,551		33,903
Commercial/Industrial(a)		24,952		23,048
Total retail		61,503		56,951
Gas transportation		1,135		1,350
Other revenues		127		125
Total gas revenues		62,765		58,426
Non-regulated energy revenues		476		73
Total Operating Revenue(a)	$	157,632	$	156,823

(a)In 2017, MGE had less than $0.1 million of revenues related to CNG vehicle fuel servicing.No revenue was recognized for fuel servicing by MGE Energy in 2017.