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Income Taxes (Schedule Of Valuation Allowance Activity) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Sep. 30, 2013
Dec. 31, 2009
Income Tax Expense (Benefit) [Abstract]          
Balance at beginning of year   $ 25,509   $ 20,411 $ 74,945
(Credited) / charged to income (614) (1,800) (49,403)    
Translation adjustment (746) (52) (391)    
Changes attributable to movement in underlying assets (4,541) 2,655 358    
Balance at end of year $ 26,312   $ 25,509 $ 20,411 $ 74,945