Investment in ATC (Tables)

9 Months Ended

Sep. 30, 2011

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended				Nine Months Ended
(In thousands)		September 30,				September 30,
		2011		2010		2011		2010
Operating revenues	$	142,741	$	136,889	$	420,562	$	414,046
Operating expenses		(66,413)		(59,732)		(192,491)		(185,067)
Other expense, net		(173)		(609)		(665)		(1,428)
Interest expense, net		(19,517)		(21,530)		(60,893)		(63,361)
Earnings before members' income taxes	$	56,638	$	55,018	$	166,513	$	164,190