v2.3.0.15
Goodwill And Intangible Assets (Changes In Goodwill) (Details) (USD $)
In Thousands
9 Months Ended12 Months Ended
Sep. 30, 2011
Dec. 31, 2010
Goodwill And Intangible Assets [Abstract]  
Opening balance$ 570,153$ 548,723
Goodwill relating to acquisitions consummated during the period398,96116,251
Effect of exchange rate fluctuations(14,929)5,179
Closing balance$ 954,185$ 570,153