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Investments in Real Estate - Additional Information (Detail) $ in Thousands | 1 Months Ended
--- | ---
Jun. 30, 2021 USD ($) Property | May 31, 2021 USD ($) Property
Real Estate Properties [Line Items] |  |
Number of multifamily properties owned | 58 |
Number of units located with multifamily properties | 16,261 |
Charlotte, NC |  |
Real Estate Properties [Line Items] |  |
Units |  | 272
Contract Price | $ |  | $ 66,544
McKinney, TX |  |
Real Estate Properties [Line Items] |  |
Units | 322 |
Contract Price | $ | $ 73,372 |
Held-for-Sale |  |
Real Estate Properties [Line Items] |  |
Number of multifamily properties owned | 1 |

X
- Definition The number of units in a real estate property acquired. + References No definition available. + Details
Name: | irt_NumberOfUnitsInRealEstatePropertyAcquired
Namespace Prefix: | irt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payments to acquire real estate including transaction fees. + References No definition available. + Details
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Namespace Prefix: | irt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The number of real estate properties 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
- 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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Data Type: | xbrli:integerItemType
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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X
- Details
Name: | srt_StatementGeographicalAxis=stpr_NC
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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X
- Details
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Balance Type: |
Period Type: |