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

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Schedule of Short-Term Borrowings

Information concerning short-term borrowings for the past two years is shown below:

		As of December 31,
(In thousands)		2017		2016
MGE Energy(a)
Available lines of credit	$	150,000	$	150,000
Short-term debt outstanding	$	4,000	$	-
Weighted-average interest rate		1.55%		-%
During the year:
Maximum short-term borrowings	$	7,500	$	-
Average short-term borrowings	$	304	$	-
Weighted-average interest rate		1.18%		-%
MGE
Available lines of credit	$	100,000	$	100,000
Commercial paper outstanding	$	4,000	$	-
Weighted-average interest rate		1.55%		-%
During the year:
Maximum short-term borrowings	$	7,500	$	-
Average short-term borrowings	$	304	$	-
Weighted-average interest rate		1.18%		-%

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