XML 45 R34.htm IDEA: XBRL DOCUMENT
v3.20.2

Indebtedness - Additional Information (Detail) - USD ($) $ in Thousands | Jul. 09, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Weighted average interest rate |  | 2.60% |  |  | 3.50% |
Mortgages |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Weighted average interest rate |  | 3.90% |  | 3.90% | 3.90% |
Unsecured Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Mortgage loan related to property disposition | $ 32,117 |  |  |  |  |
Weighted average interest rate |  | 1.60% | [1] | 1.60% | 3.20% | [2]
[1] | The unsecured credit facility total capacity is $350,000, of which $241,803 was outstanding as of September 30, 2020.
[2] | The unsecured credit facility total capacity was $350,000, of which $186,302 was outstanding as of December 31, 2019.

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

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross amount of debt extinguished. + References No definition available. + Details
Name: | us-gaap_ExtinguishmentOfDebtAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CreditFacilityAxis=irt_UnsecuredCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |