Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2022

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)	2022		2021
Regulatory Assets
Asset retirement obligation	$	14,721	$	13,081
Deferred fuel costs		12,067		3,292
Deferred bad debt expense		7,650		5,600
Debt related costs		7,580		8,173
Deferred pension and other postretirement costs		—		1,017
Derivatives		5,094		—
Leases		3,656		2,992
Tax recovery related to AFUDC equity		10,851		10,347
Unfunded pension and other postretirement liability		50,072		63,728
Other		1,750		782
Total Regulatory Assets	$	113,441	$	109,012
Regulatory Liabilities
Deferred pension and other postretirement costs	$	5,454	$	8,112
Elm Road		1,092		—
Income taxes		109,112		110,817
Non-ARO removal costs		31,664		29,694
Pension and other postretirement non-service costs		16,160		11,451
Purchased gas adjustment		4,857		1,448
Other		574		2,141
Total Regulatory Liabilities	$	168,913	$	163,663