Notes Payable to Banks, Commercial Paper, and Lines of Credit (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of Short-Term Borrowings

Information concerning short-term borrowings is shown below:

(In thousands)	MGE Energy(a)							MGE
As of December 31,	2021			2020			2021				2020
Available capacity under line of credit	$	143,815		$	96,815		$		93,815		$	46,815
Short-term debt outstanding	$	5,500		$	52,500		$		5,500		$	52,500
Letters of credit issued inside credit facilities	$	685		$	685		$		685		$	685
Weighted-average interest rate		0.15	%		0.15	%			0.15	%		0.15	%
Year Ended December 31,
Maximum short-term borrowings	$	64,000		$	52,500		$		64,000		$	52,500
Average short-term borrowings	$	28,583		$	6,393		$		28,583		$	6,393
Weighted-average interest rate		0.15	%		0.43	%			0.15	%		0.43	%

(a)MGE Energy short-term borrowings include MGE Energy and MGE lines of credit and MGE commercial paper.