Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Sep. 14, 2015	Dec. 31, 2014
Document and Entity Information:
Entity Registrant Name	SOUTHERN MISSOURI BANCORP INC
Document Type	10-K
Document Period End Date	Jun. 30, 2015
Trading Symbol	smbc
Amendment Flag	false
Entity Central Index Key	0000916907
Current Fiscal Year End Date	--06-30
Entity Common Stock, Shares Outstanding		7,424,666
Entity Public Float			$ 115.1
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	FY