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Investments in Real Estate - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2024 property unit
Real Estate [Abstract] |
Number of multifamily properties owned | 110
Number of properties owned by joint ventures | 1
Number of units located with multifamily properties | unit | 32,670

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- Definition Number Of Properties Owned by Joint Ventures + References No definition available. + Details
Name: | irt_NumberOfPropertiesOwnedByJointVentures
Namespace Prefix: | irt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of Real Estate Properties Excluding Development Properties + References No definition available. + Details
Name: | irt_NumberOfRealEstatePropertiesExcludingDevelopmentProperties
Namespace Prefix: | irt_
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
Name: | us-gaap_RealEstateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration