XML 17 R33.htm IDEA: XBRL DOCUMENT
v3.19.3

Summary of Disposition of Property (Parenthetical) (Detail) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 USD ($)
Real Estate [Abstract] |
Gain (loss) for properties, debt prepayment premium costs | $ 5,233

X
- Definition Gain (Loss) for properties, debt prepayment premium costs. + References No definition available. + Details
Name: | irt_GainLossForPropertiesDebtPrepaymentPremiumCosts
Namespace Prefix: | irt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RealEstateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration