Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Regulatory Assets and Liabilities Disclosure [Abstract]

Regulatory Assets and Liabilities

The following regulatory assets and liabilities are reflected in MGE's consolidated balance sheets as of December 31:

(In thousands)		2020		2019
Regulatory Assets
Asset retirement obligation	$	11,935	$	10,756
COVID-19 costs		3,933		-
Debt related costs		8,586		8,885
Deferred pension and other postretirement costs		5,280		6,216
Derivatives		13,989		26,875
Leases		2,748		2,400
Tax recovery related to AFUDC equity		8,952		7,060
Unfunded pension and other postretirement liability		101,594		83,214
Other		235		340
Total Regulatory Assets	$	157,252	$	145,746
Regulatory Liabilities
Deferred fuel savings	$	5,047	$	1,794
Elm Road		1,957		2,322
Income taxes		129,856		129,528
Non-ARO removal costs		28,197		26,543
Pension and other postretirement service costs		7,524		4,499
Purchased gas adjustment		1,832		1,864
Renewable energy credits		802		558
Transmission		7,669		6,019
Other		1,019		1,066
Total Regulatory Liabilities	$	183,903	$	174,193