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Goodwill And Other Intangible Assets (Reconciliation Of The Beginning And Ending Balance Of Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Goodwill And Other Intangible Assets [Abstract]      
Net carrying value of goodwill, beginning of year $ 165,372 $ 103,639 $ 104,290
Acquisitions 14,256 63,214   
Increase (decrease) due to foreign currency translation (2,447) (1,481) (651)
Net carrying value of goodwill, end of year $ 177,181 $ 165,372 $ 103,639