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Goodwill (Summary Of Changes In Carrying Amount Of Goodwill) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Dec. 31, 2012
Goodwill [Line Items]  
Beginning balance $ 1,040,234
Adjustments on account of foreign exchange 201
Ending balance 1,212,657
Acquisition of EasyLink Services International Corporation [Member]
 
Goodwill [Line Items]  
Acquisition of goodwill $ 172,222