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Summary of Significant Accounting Policies (Details 3) (USD $)
3 Months Ended 9 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Property and equipment        
Depreciation expense $ 7,100,000us-gaap_Depreciation $ 9,200,000us-gaap_Depreciation $ 21,600,000us-gaap_Depreciation $ 32,100,000us-gaap_Depreciation
Accelerated depreciation 1,200,000lrn_AcceleratedDepreciation   3,900,000lrn_AcceleratedDepreciation  
Capitalized Curriculum Development Costs        
Estimated useful life of the software     5 years  
Capitalized curriculum development costs     12,194,000lrn_PaymentsToCapitalizedCurriculumDevelopmentCosts 11,324,000lrn_PaymentsToCapitalizedCurriculumDevelopmentCosts
Capitalized curriculum development costs write down       2,200,000lrn_WritedownOfCapitalizedCurriculumDevelopmentCosts
Amortization expense 4,500,000lrn_AmortizationOfCapitalizedCurriculumDevelopmentCosts 4,300,000lrn_AmortizationOfCapitalizedCurriculumDevelopmentCosts 13,000,000lrn_AmortizationOfCapitalizedCurriculumDevelopmentCosts 14,700,000lrn_AmortizationOfCapitalizedCurriculumDevelopmentCosts
Student Computer | Minimum        
Property and equipment        
Useful Life     0 years  
Student Computer | Maximum        
Property and equipment        
Useful Life     3 years  
Computer Equipment | Minimum        
Property and equipment        
Useful Life     0 years  
Computer Equipment | Maximum        
Property and equipment        
Useful Life     3 years  
Software and Software Development Costs | Minimum        
Property and equipment        
Useful Life     3 years  
Software and Software Development Costs | Maximum        
Property and equipment        
Useful Life     5 years  
Software Development Costs Internet Domain | Minimum        
Property and equipment        
Useful Life     0 years  
Software Development Costs Internet Domain | Maximum        
Property and equipment        
Useful Life     3 years  
Office Equipment Excluding Computers | Minimum        
Property and equipment        
Useful Life     0 years  
Office Equipment Excluding Computers | Maximum        
Property and equipment        
Useful Life     5 years  
Furniture and Fixtures | Minimum        
Property and equipment        
Useful Life     0 years  
Furniture and Fixtures | Maximum        
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  
Software Development        
Property and equipment        
Useful Life     3 years  
Capitalized software development additions     25,400,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
18,500,000us-gaap_PaymentsToAcquireProductiveAssets
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
Capitalized software write down       3,800,000us-gaap_CapitalizedComputerSoftwareImpairments
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
Amortization expense 5,600,000us-gaap_CapitalizedComputerSoftwareAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
3,900,000us-gaap_CapitalizedComputerSoftwareAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
15,800,000us-gaap_CapitalizedComputerSoftwareAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
15,300,000us-gaap_CapitalizedComputerSoftwareAmortization
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
Capitalized Curriculum Development Costs        
Capitalized curriculum development costs write down $ 0lrn_WritedownOfCapitalizedCurriculumDevelopmentCosts
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember
  $ 0lrn_WritedownOfCapitalizedCurriculumDevelopmentCosts
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_SoftwareDevelopmentMember