Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Revenues disaggregated by revenue source were as follows:

(In thousands)		Year Ended December 31,
Electric revenues		2018		2017		2016
Residential	$	138,566	$	136,168	$	136,792
Commercial(a)		204,683		216,461		213,101
Industrial		13,878		16,176		17,589
Other-retail/municipal		34,023		38,010		35,559
Total retail		391,150		406,815		403,041
Sales to the market		7,438		4,067		6,135
Other revenues		1,870		2,323		1,483
Adjustments to revenues		424		721		(1,653)
Total electric revenues		400,882		413,926		409,006
Gas revenues
Residential		94,017		88,695		81,014
Commercial/Industrial(a)		59,060		55,151		48,497
Total retail		153,077		143,846		129,511
Gas transportation		4,283		4,561		4,635
Other revenues		407		418		397
Total gas revenues		157,767		148,825		134,543
Non-regulated energy revenues		1,119		348		1,196
Total Operating Revenue(a)	$	559,768	$	563,099	$	544,745

(a)In 2017 and 2016, 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 and 2016.