Investment in ATC (Tables)

3 Months Ended

Mar. 31, 2012

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended
(In thousands)		March 31,
		2012		2011
Operating revenues	$	147,662	$	139,617
Operating expenses		(69,566)		(63,126)
Other expense, net		(500)		(358)
Interest expense, net		(19,501)		(21,897)
Earnings before members' income taxes	$	58,095	$	54,236