Investment in ATC (Tables)

6 Months Ended

Jun. 30, 2012

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended				Six Months Ended
(In thousands)		June 30,				June 30,
		2012		2011		2012		2011
Operating revenues	$	152,171	$	138,203	$	299,833	$	277,820
Operating expenses		(71,760)		(62,951)		(141,326)		(126,077)
Other expense, net		(327)		(134)		(827)		(492)
Interest expense, net		(20,776)		(19,479)		(40,277)		(41,376)
Earnings before members' income taxes	$	59,308	$	55,639	$	117,403	$	109,875