Investment in ATC (Tables)

9 Months Ended

Sep. 30, 2012

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended				Nine Months Ended
(In thousands)		September 30,				September 30,
		2012		2011		2012		2011
Operating revenues	$	150,303	$	142,741	$	450,136	$	420,562
Operating expenses		(68,813)		(66,413)		(210,139)		(192,491)
Other expense, net		(5)		(173)		(832)		(665)
Interest expense, net		(20,983)		(19,517)		(61,260)		(60,893)
Earnings before members' income taxes	$	60,502	$	56,638	$	177,905	$	166,513