Other Non-Operating Income / (Expense) (Components Of Other Non-Operating Income / (Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Non-Operating Income / (Expense) [Abstract]
Early redemption call premium	$ 0	$ (14,115)	$ 0
Write-off of unamortized offering costs	0	(4,076)	0
Dividend received	0	7,642	0
Professional service expense related to the sale of the distribution	0	(2,000)	0
Impairments related to assets held for sale	(7,355)	0	0
Factoring costs and bank fees	(5,652)	(2,267)	0
Other gains / (losses)	(4,906)	1,244	(934)
Total other non operating income / (expense), net	$ (17,913)	$ (13,572)	$ (934)