Investment in ATC (Tables)

6 Months Ended

Jun. 30, 2011

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended				Six Months Ended
(In thousands)		June 30,				June 30,
		2011		2010		2011		2010
Operating revenues	$	138,203	$	138,666	$	277,820	$	277,157
Operating expenses		(62,951)		(62,523)		(126,077)		(125,335)
Other expense, net		(134)		(621)		(492)		(819)
Interest expense, net		(19,479)		(21,467)		(41,376)		(41,831)
Earnings before members' income taxes	$	55,639	$	54,055	$	109,875	$	109,172