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Acquisitions (Acquisition Of weComm) (Details) (weComm Limited [Member], USD $)
 0 Months Ended 12 Months Ended
Mar. 15, 2011
Jun. 30, 2011
Jun. 30, 2010
Business Acquisition, Cost of Acquired Entity [Abstract]      
Cash consideration paid $ 20,461,000    
Acquisition related costs 318,000    
Business Acquisition, Purchase Price Allocation [Abstract]      
Current assets 954,000    
Cash acquired from acquisition 263,000    
Long-term assets 328,000    
Total liabilities assumed (2,867,000)    
Total identifiable net assets 3,715,000    
Goodwill 16,746,000    
Fair value of total consideration transferred 20,461,000    
Goodwill expected to be deductible for tax purposes 0    
Fair value of accounts receivable acquired 190,000    
Acquired accounts receivable, gross 250,000    
Acquired accounts receivable, expected to be uncollectible 60,000    
Business Acquisition, Pro Forma Information [Abstract]      
Total revenues   1,035,175,000 915,870,000
Net income   120,913,000 88,425,000
Customer Assets [Member]
      
Business Acquisition, Purchase Price Allocation [Abstract]      
Intangible assets 300,000    
Technology Assets [Member]
      
Business Acquisition, Purchase Price Allocation [Abstract]      
Intangible assets $ 5,000,000