Non-operating income, net Non-Operating income, net (Components of Non-operating income, net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Non-operating (loss) income, net [Abstract]
Interest and Dividend Income, Securities	$ 2,957	$ 5,017	$ 7,652
Unrealized Gain (Loss) on Derivatives	422	(1,125)	(500)
Income From Transition Services Agreements	2,541	8,083	10,631
Available-for-sale Securities, Gross Realized Gain (Loss)	102	4,246	3,978
Other Nonoperating Income (Expense)	(458)	(4,691)	(1,023)
Nonoperating Income (Expense)	$ 5,564	$ 11,530	$ 20,738