Revenue (Tables)

12 Months Ended

Dec. 31, 2019

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		2,019		2018		2017
Residential	$	140,006	$	138,566	$	136,168
Commercial(a)		213,265		204,683		216,461
Industrial		12,772		13,878		16,176
Other-retail/municipal		35,174		34,023		38,010
Total retail		401,217		391,150		406,815
Sales to the market		5,664		7,438		4,067
Other revenues		1,404		2,294		3,044
Total electric revenues		408,285		400,882		413,926
Gas revenues
Residential		95,146		94,017		88,695
Commercial/Industrial(a)		59,051		59,060		55,151
Total retail		154,197		153,077		143,846
Gas transportation		5,293		4,283		4,561
Other revenues		385		407		418
Total gas revenues		159,875		157,767		148,825
Nonregulated energy revenues		695		1,119		348
Total Operating Revenue(a)	$	568,855	$	559,768	$	563,099

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