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Investments in Real Estate - Summary of Held for Sale Property (Details) $ in Thousands | Jun. 30, 2021 USD ($) Property
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Real Estate Properties [Line Items] |
Units | Property | 152
Real estate held for sale | $ | $ 27,910
King's Landing | St. Louis, MO |
Real Estate Properties [Line Items] |
Units | Property | 152
Real estate held for sale | $ | $ 27,910

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- Definition Number of units In real estate property held for sale. + References No definition available. + Details
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Namespace Prefix: | irt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
Period Type: | instant

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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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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
Name: | srt_StatementGeographicalAxis=country_MO
Namespace Prefix: |
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Period Type: |