Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Cash, Cash Equivalents, and Restricted Cash

The following table presents the components of total cash, cash equivalents, and restricted cash on the consolidated balance sheets.

(In thousands)	MGE Energy				MGE
As of December 31,	2021		2020		2021		2020
Cash and cash equivalents	$	17,438	$	44,738	$	6,401	$	4,103
Restricted cash		847		644		847		644
Receivable - margin account		550		1,657		550		1,657
Cash, cash equivalents, and restricted cash	$	18,835	$	47,039	$	7,798	$	6,404

Straight-Line Depreciation Rates

Provisions at composite straight-line depreciation rates approximate the following percentages for the cost of depreciable property:

	2021		2020		2019
Electric	3.2	%	3.5	%	3.6	%
Gas	2.2	%	2.2	%	2.1	%
Nonregulated	2.4	%	2.3	%	2.3	%