Document and Entity Information (USD $)	12 Months Ended
	Jun. 30, 2012	Aug. 22, 2012	Dec. 31, 2011
Document Information [Line Items]
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, 2012
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q4
Amendment Flag	false
Entity Common Stock, Shares Outstanding		86,151,011
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2,766,705,073