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Summary of Significant Accounting Policies (Details 3) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Property and equipment    
Depreciation expense $ 5,300 $ 7,400
Capitalized Curriculum Development Costs    
Estimated useful life of the software 5 years  
Capitalized curriculum development additions $ 3,699 3,375
Amortization expense $ 4,200 4,000
Student computers    
Property and equipment    
Useful Life 3 years  
Accelerated Depreciation $ 700 1,300
Computer hardware    
Property and equipment    
Useful Life 3 years  
Computer software | Minimum    
Property and equipment    
Useful Life 3 years  
Computer software | Maximum    
Property and equipment    
Useful Life 5 years  
Web site development costs    
Property and equipment    
Useful Life 3 years  
Office equipment    
Property and equipment    
Useful Life 5 years  
Furniture and fixtures    
Property and equipment    
Useful Life 7 years  
Leasehold improvements | Minimum    
Property and equipment    
Useful Life 3 years  
Leasehold improvements | Maximum    
Property and equipment    
Useful Life 12 years  
Capitalized software    
Property and equipment    
Useful Life 3 years  
Capitalized software development additions $ 9,500 8,900
Amortization expense $ 6,500 $ 4,800