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

12 Months Ended

Dec. 31, 2018

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,		2018		2017		2018		2017
Available lines of credit	$	150,000	$	150,000	$	100,000	$	100,000
Short-term debt outstanding	$	13,000	$	4,000	$	13,000	$	4,000
Weighted-average interest rate		2.55%		1.55%		2.55%		1.55%
Year Ended December 31,
Maximum short-term borrowings	$	31,500	$	7,500	$	31,500	$	7,500
Average short-term borrowings	$	9,211	$	304	$	9,211	$	304
Weighted-average interest rate		1.92%		1.18%		1.92%		1.18%

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