Document and Entity Information (USD $)	9 Months Ended
	Jan. 31, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	Investors Real Estate Trust
Entity Central Index Key	0000798359
Current Fiscal Year End Date	--04-30
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float	$ 770,620,552
Entity Common Stock, Shares Outstanding	107,263,423
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2014