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

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Short-Term Borrowings

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

		As of December 31,
(In thousands)		2013		2012		2011
MGE Energy(a)
Available lines of credit	$	150,000	$	115,000	$	115,000
During the year:
Maximum short-term borrowings	$	32,000	$	16,000	$	28,500
Average short-term borrowings	$	6,992	$	1,154	$	3,410
Weighted-average interest rate		0.18%		0.17%		1.43%
MGE
Available lines of credit	$	100,000	$	75,000	$	75,000
During the year:
Maximum short-term borrowings	$	32,000	$	16,000	$	9,500
Average short-term borrowings	$	6,992	$	1,154	$	349
Weighted-average interest rate		0.18%		0.17%		0.25%

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