Interest Income / (Expense), Net (Components Of Interest Income / (Expense)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest Income / (Expense), Net [Abstract]
Interest income	$ 1,380	$ 4,450	$ 10,930
Interest expense	(113,029)	(109,316)	(84,398)
Total interest (expense), net	$ (111,649)	$ (104,866)	$ (73,468)