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Investments in Real Estate - Additional Information (Detail)	9 Months Ended
	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

X

- Definition

Number Of Properties Owned by Joint Ventures

+ References

No definition available.

+ Details

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Namespace Prefix:	irt_
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X

- Definition

Number of Real Estate Properties Excluding Development Properties

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No definition available.

+ Details

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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

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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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