XML 38 R27.htm IDEA: XBRL DOCUMENT
v3.20.2

Investments in Real Estate - Additional Information (Detail) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Oct. 29, 2020 USD ($) Property | Feb. 29, 2020 USD ($) Property | Dec. 31, 2020 Property | Sep. 30, 2020 USD ($) Property
Real Estate Properties [Line Items] |  |  |  |
Number of multifamily properties owned |  |  |  | 58
Number of units located with multifamily properties |  |  |  | 15,805
McKinney, TX |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Units |  | 251 |  |
Contract Price | $ |  | $ 51,204 |  |
Chattanooga, TN | Subsequent Event |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of units in real estate properties disposed | 172 |  |  |
Sale price | $ | $ 20,000 |  |  |
Held-for-Sale |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of multifamily properties owned |  |  |  | 3
Held-for-Sale | Baton Rouge, LA |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of units located with multifamily properties |  |  |  | 264
Impairment charge | $ |  |  |  | $ 1,840
Forecast | Held-for-Sale |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of real estate properties expected to be sold |  |  | 3 |

X
- Definition Number of real estate properties expected to be sold. + References No definition available. + Details
Name: | irt_NumberOfRealEstatePropertiesExpectedToBeSold
Namespace Prefix: | irt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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 The number of units in a real estate property disposed. + References No definition available. + Details
Name: | irt_NumberOfUnitsInRealEstatePropertyDisposed
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
Name: | irt_PaymentsToAcquireRealEstateIncludingTransactionFees
Namespace Prefix: | irt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sale price of real estate property. + References No definition available. + Details
Name: | irt_SalePriceOfRealEstateProperty
Namespace Prefix: | irt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 + Details
Name: | us-gaap_ImpairmentOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
- 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
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |