v2.4.0.6
Document and Entity Information
6 Months Ended
Dec. 31, 2012
Jan. 28, 2013
Document and Entity Information    
Entity Registrant Name K12 INC  
Entity Central Index Key 0001157408  
Document Type 10-Q  
Document Period End Date Dec. 31, 2012  
Amendment Flag false  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   37,102,938
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2