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Special Charges (Narrative) (Details) (USD $)
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]    
Acquisition-related costs $ 804,000 $ 815,000
Other charges 605,000 (1,355,000)
Special Charges [Member]
   
Restructuring Cost and Reserve [Line Items]    
Acquisition-related costs   800,000
Acquisition-integration related costs 100,000  
Recovery ARO [Member]
   
Restructuring Cost and Reserve [Line Items]    
Other charges 600,000 800,000
Recovery Sublease [Member]
   
Restructuring Cost and Reserve [Line Items]    
Other charges   500,000
Fiscal 2013 Restructuring Plan [Member]
   
Restructuring Cost and Reserve [Line Items]    
Expected total restructuring costs 15,000,000  
Special charges recorded to date 7,600,000  
Fiscal 2012 Restructuring Plan [Member]
   
Restructuring Cost and Reserve [Line Items]    
Special charges recorded to date 17,500,000  
Acquisition of EasyLink Services International Corporation [Member] | Special Charges [Member]
   
Restructuring Cost and Reserve [Line Items]    
Acquisition-related costs $ 700,000