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Summary of Significant Accounting Policies (Details 2) (USD $)
0 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 09, 2014
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Mar. 31, 2014
Jun. 30, 2014
Concentration of revenues            
Revenues   $ 244,623,000us-gaap_Revenues $ 235,222,000us-gaap_Revenues $ 712,640,000us-gaap_Revenues $ 687,507,000us-gaap_Revenues  
Period of contract entered to provide academic curriculum 3 years          
Inventories            
Increase in provision for excess and obsolete inventory         6,100,000lrn_IncreaseDecreaseInInventoryReserve  
Excess and obsolete inventory reserve   1,600,000us-gaap_InventoryValuationReserves   1,600,000us-gaap_InventoryValuationReserves   9,100,000us-gaap_InventoryValuationReserves
Accounts Receivable            
Concentration of revenues            
Concentration risk (as a percent)       10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
  9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
Customer A | Sales Revenue, Services, Net | Customer Concentration Risk            
Concentration of revenues            
Revenues   $ 34,400,000us-gaap_Revenues
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= lrn_CustomerAMember
$ 33,400,000us-gaap_Revenues
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= lrn_CustomerAMember
$ 95,000,000us-gaap_Revenues
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= lrn_CustomerAMember
$ 90,000,000us-gaap_Revenues
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= lrn_CustomerAMember