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Organization (Detail) - Sep. 30, 2022	Property	unit	jointVenture
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of multifamily properties owned	122	122
Number of units located with multifamily properties | unit		36,176
Number of joint ventures | jointVenture			5

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- Definition

Number Of Joint Ventures

+ References

No definition available.

+ Details

Name:	irt_NumberOfJointVentures
Namespace Prefix:	irt_
Data Type:	xbrli:integerItemType
Balance Type:	na
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X

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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