BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Impairment of Long-Lived Assets (Details) - USD ($)	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Impairment of real estate investments	$ 0	$ 0

Impairment of real estate continuing and discontinued operations.

No definition available.

Name:	iret_ImpairmentOfRealEstateContinuingAndDiscontinuedOperations
Namespace Prefix:	iret_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration