v2.4.0.8
Document and Entity Information (USD $)
12 Months Ended
Jun. 30, 2015
Sep. 09, 2015
Dec. 31, 2014
Document and Entity Information [Abstract]      
Entity Registrant Name HENRY JACK & ASSOCIATES INC    
Entity Central Index Key 0000779152    
Current Fiscal Year End Date --06-30    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Jun. 30, 2015    
Document Fiscal Year Focus 2015    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   80,219,921  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Public Float     $ 5,046,822,763