Joint Plant Ownership (Tables)

12 Months Ended

Dec. 31, 2016

Columbia Units [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE's interest in Columbia's gross utility plant in service, and the related accumulated depreciation reserves at December 31 were as follows:

(In thousands)		2016		2015
Utility plant	$	270,898	$	273,762
Accumulated depreciation		(81,935)		(84,864)
Property, plant, and equipment, net		188,963		188,898
Construction work in progress		21,120		17,110
Total property, plant, and equipment	$	210,083	$	206,008

Elm Road Units [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE Power Elm Road's interest in the portion of the Elm Road Units in-service and the related accumulated depreciation reserves at December 31 were as follows:

(In thousands)		2016		2015
Nonregulated plant	$	204,292	$	202,326
Accumulated depreciation		(28,790)		(24,422)
Property, plant, and equipment, net		175,502		177,904
Construction work in progress		3,241		2,400
Total property, plant, and equipment	$	178,743	$	180,304

West Campus [Member]

Jointly Owned Utility Plant Interests [Line Items]

Schedule of Joint Plant Ownership

MGE Power West Campus' interest in WCCF and the related accumulated depreciation reserves at December 31 were as follows:

(In thousands)		2016		2015
Nonregulated plant	$	111,330	$	111,141
Accumulated depreciation		(29,742)		(26,738)
Property, plant, and equipment, net		81,588		84,403
Construction work in progress		1,009		113
Total property, plant, and equipment	$	82,597	$	84,516