Document and Entity Information - shares	6 Months Ended
	Dec. 31, 2014	Jun. 22, 2015
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-Q
Document Period End Date	Dec. 31, 2014
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		80,992,682
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	No