Investment in ATC (Tables)

6 Months Ended

Jun. 30, 2013

Investment in ATC (Tables) [Abstract]

ATC's Summarized Financial Data

		Three Months Ended				Six Months Ended
		June 30,				June 30,
(In thousands)		2013		2012		2013		2012
Operating revenues	$	152,128	$	152,171	$	303,865	$	299,833
Operating expenses		(69,875)		(71,760)		(139,645)		(141,326)
Other income (expense), net		116		(327)		(332)		(827)
Interest expense, net		(21,052)		(20,776)		(42,096)		(40,277)
Earnings before members' income taxes	$	61,317	$	59,308	$	121,792	$	117,403