Document And Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Sep. 30, 2017
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Entity Registrant Name	INTERGROUP CORP
Entity Central Index Key	0000069422
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float		$ 20,717,000
Trading Symbol	INTG
Entity Common Stock, Shares Outstanding		2,359,724