Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Asset Retirement Obligation Disclosure [Abstract]

Change in Asset Retirement Obligations

The following table shows a rollforward of the AROs from January 1, 2012 toDecember 31, 2013. Amounts include conditional AROs.

(In thousands)		2013		2012
Balance at January 1,	$	18,768	$	19,173
Liabilities incurred		296		49
Accretion expense		1,015		1,021
Liabilities settled		(744)		(221)
Revisions in estimated cash flows(a)		24		(1,254)
Balance at December 31,	$	19,359	$	18,768

(a) In2012, MGE recorded a decrease in revisions in estimated cash flows of $1.3 million based on revised asbestos abatement estimates.