Document And Entity Information Equity Method Investments [Policy Text Block] Statistical Measurement [Axis] Note To Financial Statement Details Textual Significant Accounting Policies us-gaap_IncomeTaxExpenseBenefit Income Tax Expense (Benefit) Note 2 - Summary of Significant Accounting Policies ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 3 - Investments in Real Estate Investments in unconsolidated real estate entities Derecognition of investments in unconsolidated real estate entities ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 4 - Investments in Unconsolidated Real Estate Trading Arrangements, by Individual [Table] Note 5 - Indebtedness Material Terms of Trading Arrangement [Text Block] Note 6 - Derivative Financial Instruments irt_NumberOfPropertiesMultifamilyApartments Number of Properties, Multifamily Apartments The number of properties classified as multifamily apartments. Note 8 - Equity Compensation Plans Note 9 - Earnings Per Share irt_NumberOfInvestmentsInDevelopingRealEstate Number of Investments in Developing Real Estate The number of investments in real estate that are under development. Note 10 - Segment Reporting us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation Repurchase of shares related to equity award tax withholding (in shares) irt_NumberOfConsolidatedPropertiesMultifamilyApartments Number of Consolidated Properties, Multifamily Apartments The number of consolidated properties classified as multifamily apartments. Note 2 - Summary of Significant Accounting Policies - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) Minimum [Member] Note 3 - Investments in Real Estate - Schedule of Real Estate Investments (Details) Note 3 - Investments in Real Estate - Schedule of Properties Held for Sale (Details) Statistical Measurement [Domain] Note 3 - Investments in Real Estate - Schedule of Acquisitions (Details) Maximum [Member] Note 3 - Investments in Real Estate - Schedule of Fair Value of Assets and Liabilities Associated With Acquisitions (Details) irt_NumberOfUnconsolidatedJointVentures Number of Unconsolidated Joint Ventures The number of unconsolidated joint ventures. Note 4 - Investments in Unconsolidated Real Estate - Schedule of Equity Method Investments in Real Estate Entities (Details) Loss from unconsolidated real estate entities Income (Loss) from Equity Method Investments Equity in loss from investments in unconsolidated real estate entities Note 5 - Indebtedness - Schedule of Long-Term Debt (Details) irt_NumberOfUnconsolidatedJointVenturesMultifamilyApartmentCommunities Number of Unconsolidated Joint Ventures, Multifamily Apartment Communities The number of unconsolidated joint ventures classified as multifamily apartment communities. Note 5 - Indebtedness - Schedule of Maturities of Long-Term Debt (Details) Note 6 - Derivative Financial Instruments - Schedule of Derivative Instruments (Details) Note 8 - Equity Compensation Plans - Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity (Details) us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities Accounts payable and accrued expenses Note 9 - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) Note 10 - Segment Reporting - Schedule of Segment Information (Details) irt_NumberOfUnitsInRealEstatePropertiesUponCompletion Number of Units in Real Estate Properties Upon Completion The number of units in real estate properties upon completion. Notes To Financial Statements Notes To Financial Statements [Abstract] irt_NumberOfUnitsInRealEstatePropertyMultifamilyApartmentCommunities Number of Units in Real Estate Property, Multifamily Apartment Communities The number of units in real estate property classified as multifamily apartment communities. irt_NumberOfUnconsolidatedJointVenturesMultifamilyApartmentProperties Number of Unconsolidated Joint Ventures, Multifamily Apartment Properties The number of unconsolidated joint ventures classified as multifamily apartment properties. us-gaap_InterestCostsCapitalized Interest Costs Capitalized Interest Rate Collars [Member] Represents interest rate collars. irt_NumberOfUnitsInRealEstatePropertyMultifamilyApartmentProperties Number of Units in Real Estate Property, Multifamily Apartment Properties The number of units in real estate property classified as multifamily apartment properties. O 2026 Q2 Dividends [Member] Represents the dividends for Q2 of 2026. us-gaap_LaborAndRelatedExpense Personnel expenses Lakeline Station [Member] Represents the equity investment in lakeline station. Land [Member] Common Stock, Dividends, Per Share, Declared (in dollars per share) Common Stock, Dividends, Per Share, Declared (in dollars per share) Weighted Average [Member] us-gaap_IncreaseDecreaseInInterestPayableNet Accrued interest payable us-gaap_SharesOutstanding Balance (in shares) Balance (in shares) Dividends [Axis] Dividends [Domain] Segment Reporting [Text Block] us-gaap_ProceedsFromSaleOfRealEstateHeldforinvestment Proceeds from dispositions of real estate properties, net Award Type [Axis] Segment Reporting [Table Text Block] Adjustments to reconcile net income to cash flow from operating activities: Preferred stock, $0.01 par value; 50,000,000 shares authorized, 0 and 0 shares issued and outstanding, respectively Plan Name [Axis] us-gaap_Liabilities Total Liabilities Total liabilities Liabilities [Abstract] Plan Name [Domain] us-gaap_AllocatedShareBasedCompensationExpense Share-Based Payment Arrangement, Expense us-gaap_LiabilitiesAndStockholdersEquity Total Liabilities and Equity Total liabilities and equity Consolidation Items [Axis] Segment Reporting [Table] The Approach [Member] Represents The Approach. us-gaap_ShareBasedCompensation Stock compensation expense LIABILITIES AND EQUITY: Equity Method Investment, Nonconsolidated Investee [Axis] Consolidation Items [Domain] Equity Method Investment, Nonconsolidated Investee [Domain] us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet Debt Instrument, Unamortized Discount (Premium) Change in fair value of interest rate hedges Share-Based Payment Arrangement [Text Block] Changes in assets and liabilities: us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax Realized gains on interest rate hedges reclassified to earnings Preferred Stock, Shares Issued (in shares) Preferred Stock, Shares Outstanding (in shares) Preferred Stock, Shares Authorized (in shares) Reconciliation of cash, cash equivalents, and restricted cash to the Condensed Consolidated Balance Sheets us-gaap_RestrictedCash Restricted Cash Portion at Fair Value Measurement [Member] Reported Value Measurement [Member] Fair Value, by Balance Sheet Grouping [Table] Preferred Stock, Par Value (in dollars per share) us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect Net change in cash, cash equivalents, and restricted cash us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents Total cash, cash equivalents, and restricted cash, end of period Estimate of Fair Value Measurement [Member] us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding Limited Partners' Capital Account, Units Outstanding (in shares) New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations Cash, cash equivalents, and restricted cash, beginning of period Cash, cash equivalents, and restricted cash, end of the period Share-Based Payment Arrangement, Tranche One [Member] irt_AtMarketSalesAgreementMaximumOfferPriceOfCommonShares At Market Sales Agreement, Maximum Offer Price of Common Shares Represents the maximum offer price of common shares in an at market sales agreement. Statement [Table] Credit Facility [Axis] Credit Facility [Domain] Units acquired Represents the number of units in real estate property acquired at a certain date. irt_AssetAcquisitionAssetsAcquiredOtherAssets Other assets Represents assets acquired classified as other assets in an asset acquisition transaction. irt_AssetAcquisitionAssetsAcquiredInvestmentsInRealEstatePropertyNet Investments in real estate Represents the fair value of net investments in real estate property included in assets acquired in an asset acquisition. At Market Program [Member] Represents the at market program. Share-Based Payment Arrangement, Tranche Two [Member] irt_AssetAcquisitionLiabilitiesAssumedOtherLiabilities Other liabilities Represents liabilities assumed classified as other liabilities in an asset acquisition transaction. irt_AssetAcquisitionLiabilitiesAssumedAccountsPayableAndAccruedExpenses Accounts payable and accrued expenses Represents accounts payable and accrued expenses included under liabilities assumed in an asset acquisition transaction. Equity Method Investment, Carrying Value Total liabilities assumed Represents the total liabilities assumed under an asset acquisition transaction. Total assets acquired Represents the total amount of assets acquired under an asset acquisition transaction. irt_AssetAcquisitionAssetsAcquiredIntangibleAssetsOtherThanGoodwill Intangible assets Represents intangible assets other than goodwill that are classified as assets acquired under an asset acquisition transaction. us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Line of Credit Facility, Maximum Borrowing Capacity Equity Method Investment, Ownership Percentage Equity Method Investment, Ownership Percentage Derivative liabilities Derivative liabilities Estimated fair value of net assets acquired Represents the net total assets acquired and liabilities assumed under an asset acquisition transaction. irt_NumberOfUnitsInRealEstatePropertyDisposed Number of Units in Real Estate Property Disposed Represents the number of units in real estate property disposed of as of a given date. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares) Balance, shares (in shares) Balance, shares (in shares) us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue Balance, weighted average grant date fair value (in dollars per share) Balance, weighted average grant date fair value (in dollars per share) Nature of Operations [Text Block] srt_StockRepurchaseProgramAuthorizedAmount1 Share Repurchase Program, Authorized, Amount Granted, shares (in shares) Granted, weighted average grant date fair value (in dollars per share) Long-Term Debt, Type [Axis] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod Forfeited, shares (in shares) Other revenue Other revenue Gain on sale of real estate assets, net Gain on sale of real estate assets, net Gain on sale of real estate assets, net Ownership [Axis] Ownership [Domain] Vested, weighted average grant date fair value (in dollars per share) Line of Credit Facility [Table] us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod Vested, shares (in shares) us-gaap_RepaymentsOfDebt Unsecured revolver, secured credit facility and term loan repayments us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares) us-gaap_OperatingLeaseExpense Operating Lease, Expense Schedule of Maturities of Long-Term Debt [Table Text Block] Assets [Abstract] Commitments and Contingencies Disclosure [Text Block] Statement [Line Items] Common Stock, Shares Issued (in shares) Restricted Stock And Restricted Stock Units [Member] Represents both restricted stock and restricted stock units. Common Stock, Shares Outstanding (in shares) Award Type [Domain] Common Stock, Shares Authorized (in shares) us-gaap_RealEstateInventoryCapitalizedInterestCosts Real Estate Inventory, Capitalized Interest Costs us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1 Share Repurchase Program, Remaining Authorized, Amount Rental and other property revenue Same-store (1) rental and other property revenue us-gaap_ConstructionPayableCurrentAndNoncurrent Construction Payable Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Dividends payable Common stock, $0.01 par value; 500,000,000 shares authorized, 235,742,658 and 237,234,750 shares issued and outstanding, including 428,346 and 382,337 unvested restricted common share awards, respectively Fair Value of Financial Instruments, Policy [Policy Text Block] Accrued interest payable Proceeds from insurance claims us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income O 2026 Q1 Dividends [Member] O 2026 Q1 Dividends Significant Accounting Policies [Text Block] The Retreat at Canal [Member] The Retreat at Canal Denver, Colorado [Member] Represents Denver, Colorado. us-gaap_OperatingLeaseLiability Operating Lease, Liability Independence Realty Trust [Member] Independence Realty Trust Real Estate, Policy [Policy Text Block] Indianapolis, Indiana [Member] Represents Indianapolis, Indiana. us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive Debt maturities, thereafter us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo Debt maturities, year two us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour Debt maturities, year four us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree Debt maturities, year three us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths Debt maturities, year one us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive Debt maturities, year five The Mustang [Member] Represents the mustang. Dallas, Texas [Member] Represents Dallas, Texas. Nexton Pine Hollow [Member] Represents nexton pine hollow. Charleston, South Carolina [Member] Represents Charleston, South Carolina. Austin, Texas [Member] Represents Austin, Texas. us-gaap_PaymentsOfFinancingCosts Payment for deferred financing costs us-gaap_LongTermDebt Debt Instrument, Carrying Amount Investments in Unconsolidated Real Estate Entities [Member] Represents investments in unconsolidated real estate entities. us-gaap_OperatingLeaseLiabilityStatementOfFinancialPositionExtensibleList Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration] Loss Contingencies [Table] Statement of Stockholders' Equity [Abstract] Intangible Asset, Finite-Lived, Class [Axis] Statement of Comprehensive Income [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Statement of Cash Flows [Abstract] us-gaap_OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Long-Term Debt, Type [Domain] Equity Components [Axis] Proceeds from unsecured revolver and term loan Equity Component [Domain] Asset Acquisition [Table Text Block] Equity [Text Block] AOCI Attributable to Parent [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Asset Acquisition [Table] Units acquired, price us-gaap_AssetAcquisitionConsiderationTransferred us-gaap_RealEstateTaxExpense Real estate taxes us-gaap_RealEstateInsurance Property insurance Sale of Stock [Axis] Property management expenses Property management expenses Furniture and Fixtures [Member] A2026 Term Loan [Member] Represents the 2026 Term Loan. Term Loan Facility [Member] Represents the term loan facility. Stockholders’ equity: A2028 Term Loan [Member] Represents the 2028 Term Loan. Fair Value, by Balance Sheet Grouping [Table Text Block] us-gaap_ImpairmentOfIntangibleAssetsFinitelived Intangible Asset, Finite-Lived, Impairment Loss us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments Accretion of loan discounts and premiums, net us-gaap_SECScheduleIIIRealEstateAccumulatedDepreciationDepreciationExpense SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate, Accumulated Depreciation, Depreciation Expense us-gaap_SECScheduleIIIRealEstateInvestmentPropertyNet Investments in real estate, net us-gaap_PaymentsToAcquireEquityMethodInvestments Investments in unconsolidated real estate entities Lessee, Leases [Policy Text Block] us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation Accumulated depreciation Accumulated other comprehensive income Finite-Lived Intangible Assets, Accumulated Amortization General and administrative expenses General and administrative expenses Loss on extinguishment of debt Loss on extinguishment of debt Loss on extinguishment of debt Additional paid-in capital Debt Disclosure [Text Block] Noncontrolling interests Use of Estimates, Policy [Policy Text Block] Same Store [Member] represents the same store segment. us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year) us-gaap_PaymentsToAcquireRealEstate Acquisition of real estate properties Non-same Store [Member] Represents the non-same store segment. us-gaap_StockIssuedDuringPeriodValueNewIssues Issuance of common shares, net us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1 Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period (Year) Stock compensation us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders Distribution to noncontrolling interest declared us-gaap_MinorityInterestOwnershipPercentageByParent Subsidiary, Ownership Percentage, Parent us-gaap_DebtInstrumentCarryingAmount Long-Term Debt, Gross irt_OtherPropertyExpenses Other property operating expenses (2) The other property operating expenses. us-gaap_StockRepurchasedAndRetiredDuringPeriodValue Stock Repurchased and Retired During Period, Value Repurchase of common stock, including repurchase costs Mortgages [Member] irt_ContractServiceExpense Contract services The operating expense related to contract services. us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation1 SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation, Life Used for Depreciation (Year) Stock compensation (in shares) us-gaap_RealEstateGrossAtCarryingValue Real Estate, Gross Leases, Acquired-in-Place [Member] Issuance of common shares, net (in shares) Stock Issued During Period, Shares, New Issues\ (in shares) Restricted Stock Units (RSUs) [Member] irt_PaymentsToAcquirePropertyPlantAndEquipmentExcludingRealEstate Capital expenditures The payments for property, plant and equipment excluding real estate. Debt Instrument, Name [Domain] us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Weighted Average Contractual Rate us-gaap_DebtInstrumentInterestRateEffectivePercentage Debt Instrument, Weighted Average Effective Rate Real Estate Disclosure [Text Block] us-gaap_StockRepurchasedAndRetiredDuringPeriodShares Stock Repurchased and Retired During Period, Shares (in shares) Repurchase of common stock, including repurchase costs (in shares) Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] Investments in real estate: Cash flows from operating activities: Cash flows from investing activities: us-gaap_NetCashProvidedByUsedInOperatingActivities Cash flow provided by operating activities Cash flows from financing activities: us-gaap_NetCashProvidedByUsedInInvestingActivities Cash flow used in investing activities us-gaap_TreasuryStockAcquiredAverageCostPerShare Shares Acquired, Average Cost Per Share (in dollars per share) us-gaap_NetCashProvidedByUsedInFinancingActivities Cash flow used in financing activities us-gaap_RealEstateInvestmentPropertyNet Investments in real estate, net Investments in real estate us-gaap_ImpairmentOfLongLivedAssetsHeldForUse Long-Lived Asset, Held and Used, Impairment Loss Investments in real estate, at cost Total investments in real estate us-gaap_AdvertisingExpense Advertising expenses Operating Segments [Member] Accounting Policies [Abstract] Segments [Domain] Segments [Axis] Investments in real estate under development Real Estate Investment, Development in Process, Net Represents the net amount of real estate investment that is under the process of development. Income Statement [Abstract] Property operating expenses Represents operating expenses related to cost of property. Debt Not Associated with Real Estate Held for Sale [Member] Represents debt that is not associated with real estate held for sale. us-gaap_NumberOfReportableSegments Number of Reportable Segments Accounts payable and accrued expenses Accounts payable and accrued expenses Represents the value of accounts payable and accrued expenses that excludes interest and dividends payable. irt_ProceedsFromPaymentsForIssuanceOfCommonStock (Costs) proceeds from issuance of common stock, net Represents the proceeds from (payments for) issuance of common stock. us-gaap_NetIncomeLoss Net income allocable to common shares Income allocable to common shares Indebtedness, net Mortgage loan (1) irt_PaymentsOfProceedsFromDebtExtinguishment Payment for debt extinguishment Represents the payments of (proceeds from) debt extinguishment. Investments in Real Estate Under Development [Member] Represents investments in real estate that are under development. us-gaap_AmortizationOfFinancingCosts Amortization of deferred financing costs, net us-gaap_AmortizationOfIntangibleAssets Intangible Asset, Finite-Lived, Amortization Expense Real Estate [Table] us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts Issuance of common shares, net us-gaap_InterestRateCashFlowHedgeGainLossReclassifiedToEarningsNet Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net EXPENSES: Forward Interest Rate Swap [Member] Represents the Forward Interest Rate Swap. Real Estate and Accumulated Depreciation By Property [Table Text Block] Represents the tabular disclosure of real estate and accumulated depreciation by property. Real Estate Acquired [Table Text Block] Represents the tabular disclosure of acquisitions of real estate. Furniture, Fixtures, and Equipment [Member] Represents furniture, fixtures, and equipment. us-gaap_OtherNoncashIncomeExpense Other loss irt_UnitDividendsPerShareDeclared Unit Dividends Per Share Declared (in dollars per share) Represents the number of united dividends declared per share. Unsecured Debt [Member] us-gaap_CostsAndExpenses Total expenses us-gaap_UnusualOrInfrequentItemNetOfInsuranceProceeds Unusual or Infrequent Item, or Both, Net of Insurance Proceeds Accounting Standards Update and Change in Accounting Principle [Table] Income Tax, Policy [Policy Text Block] us-gaap_UtilitiesOperatingExpenseOperations Utilities us-gaap_UtilitiesOperatingExpenseMaintenance Repairs and maintenance us-gaap_DeferredFinanceCostsNet Debt Instrument, Unamortized Debt Issuance Costs Measurement Basis [Axis] Vesting [Axis] Statement of Financial Position [Abstract] Vesting [Domain] us-gaap_RepaymentsOfFirstMortgageBond Mortgage principal repayments and payoffs us-gaap_DividendsCommonStock Common dividends declared us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions Escrow deposits for pending real estate acquisitions Other Assets Other assets us-gaap_TangibleAssetImpairmentCharges Tangible Asset Impairment Charges us-gaap_PaymentsForRepurchaseOfCommonStock Repurchase of common stock, including repurchase costs us-gaap_IncreaseDecreaseInOtherOperatingAssets Other assets Document Type Document Information [Line Items] Document Quarterly Report us-gaap_LesseeOperatingLeaseTermOfContract Lessee, Operating Lease, Term of Contract (Year) Document Information [Table] us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) Entity Interactive Data Current Document Transition Report Diluted (in shares) Weighted-average shares outstanding—Diluted (in shares) us-gaap_OperatingExpenses Operating Expenses Earnings per share: Basic (in shares) Weighted-average shares outstanding—Basic (in shares) us-gaap_DebtInstrumentTerm Debt Instrument, Weighted Average Maturity (Year) Derivative Instrument [Axis] Basic (in dollars per share) Earnings per share—Basic (in dollars per share) Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] irt_SharebasedCompensationArrangementBySharebasedPaymentAwardNumberOfAdditionalSharesPotentiallyRecycledIntoTheStockPlan Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Potentially Recycled Into the Stock Plan (in shares) Number of additional shares authorized for issuance under share-based payment arrangement from shares potentially recycled into the stock plan. Intangible assets, net of accumulated amortization of $335 and $3,257, respectively Document Fiscal Period Focus Document Fiscal Year Focus Investment, Name [Domain] Depreciation and amortization expense Depreciation and amortization Amendment Flag Common Stock [Member] us-gaap_IncreaseDecreaseInOtherOperatingLiabilities Other liabilities Document Period End Date Building [Member] Legal Entity [Axis] us-gaap_ImpairmentOfIntangibleAssetFiniteLivedStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] Entity File Number Entity Tax Identification Number Entity [Domain] Entity Central Index Key Entity Registrant Name irt_CommonStockDividendsPercentageIncreaseDecrease Common Stock Dividends, Percentage Increase (Decrease) Represents the percentage increase (decrease) in common stock dividends. Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Filer Category Entity Shell Company Entity Emerging Growth Company us-gaap_OtherComprehensiveIncomeLossNetOfTax Total other comprehensive income Other comprehensive income Derivative, Notional Amount Entity Small Business Building and Building Improvements [Member] us-gaap_OperatingIncomeLoss Net Operating Income us-gaap_ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] Hedging Designation [Domain] irt_EquityMethodInvestmentOwnershipPercentageAcquired Equity Method Investment, Ownership Percentage Acquired The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting that was acquired. Derivative assets Derivative assets irt_LineOfCreditFacilityMaximumBorrowingCapacitySubjectToTermsAndConditions Line of Credit Facility, Maximum Borrowing Capacity, Subject to Terms and Conditions Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Sixth Restated Credit Agreement [Member] Sixth Restated Credit Agreement Derivative Instruments and Hedging Activities Disclosure [Text Block] Total consolidated revenue Total revenue REVENUE: Entity Address, State or Province Entity Address, City or Town us-gaap_InterestExpenseNonoperating Interest expense Interest expense Accumulated deficit Entity Address, Address Line One City Area Code us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Repurchase of shares related to equity award tax withholding Local Phone Number Entity Address, Postal Zip Code Equity Method Investment [Table] Derivative [Table] Title of 12(b) Security Security Exchange Name Trading Symbol Derivatives, Policy [Policy Text Block] Class of Stock [Axis] irt_PolicyTable Entity Common Stock, Shares Outstanding Other comprehensive income (loss): Cash Flow Hedging [Member] Earnings Per Share [Text Block] Hedging Designation [Axis] us-gaap_NetIncomeLossAttributableToNoncontrollingInterest (Income) loss allocated to noncontrolling interest Cash acquired in consolidation of unconsolidated real estate entity Net income Net loss Net income (loss) Net income Scenario [Axis] Scenario [Domain] Forecast [Member] us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Weighted-average shares: Real Estate [Domain] Long-Lived Assets Held-for-Sale, Name [Domain] Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Real Estate, Type of Property [Axis] Long-Lived Asset, Held-for-Sale [Table] Common Stock, Par Value (in dollars per share) Investment, Name [Axis] Common Stock, Unvested Restricted Share Awards (in shares) The amount of unvested, restricted common share awards. Real estate, held for sale Other Liabilities Other liabilities Basis of Accounting, Policy [Policy Text Block] Hedging Relationship [Axis] Derivative Contract [Domain] Other Nonoperating Income (Expense) Real Estate Held for Development and Sale, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Sale of Stock [Domain] us-gaap_Assets Total Assets Total assets Cash and Cash Equivalents, Policy [Policy Text Block] Designated as Hedging Instrument [Member] Deferred Charges, Policy [Policy Text Block] Cash and cash equivalents Cash and cash equivalents us-gaap_PaymentsToDevelopRealEstateAssets Real estate development expenditures Geographical [Domain] Long-Lived Asset, Held-for-Sale, Type [Axis] Geographical [Axis] Noncontrolling Interest, Dividends Declared, Price Per Share (in dollars per share) The price per share of dividends declared for noncontrolling interests. us-gaap_CommonStockCapitalSharesReservedForFutureIssuance Common Stock, Capital Shares Reserved for Future Issuance (in shares) Cash Flow Hedge Derivative Instrument Liabilities at Fair Value Diluted (in dollars per share) Earnings per share—Diluted (in dollars per share) Cash Flow Hedge Derivative Instrument Assets at Fair Value irt_AmortizationRelatedToDerivativeInstruments Amortization related to derivative instruments The amount of amortization related to derivative instruments. Revenue from Contract with Customer [Policy Text Block] irt_PolicyholderBenefitsAndClaimsIncurredNoncashCasualtyGainsLoss Non-cash casualty losses The amount of non-cash casualty gains/losses for policyholder benefits and claims incurred. Equity Method Investments and Joint Ventures Disclosure [Text Block] us-gaap_DepreciationDepletionAndAmortization Depreciation and amortization Equity Method Investments [Table Text Block] Stonebridge Crossing [Member] Relating to Stonebridge Crossing. irt_RealEstateHeldForDevelopmentAndSalePlacedInServiceNet Real Estate Investment, Development in Process, Placed in Service, Net For banks, amount of real estate assets held for development or sale and placed in service, net of associated liabilities. Casualty (gains) losses, net Casualty gains (losses), net Schedule of Derivative Instruments [Table Text Block] Units held for sale Represents the number of real estate units held for sale at end of period. Schedule of Real Estate Held For Sale [Table Text Block] The tabular disclosure of real estate held for sale. us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation Repurchase of shares related to equity award tax withholding Bella Terra at City Center [Member] Relating to Bella Terra at City Center. us-gaap_FinitelivedIntangibleAssetsAcquired1 Intangible Asset, Finite-Lived, Acquired Consolidation, Policy [Policy Text Block] Interest Rate Swap [Member] Schedule of Long-Term Debt Instruments [Table Text Block] us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest Allocation to noncontrolling interests us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest Comprehensive income before allocation to noncontrolling interests us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest Total Equity Balance Balance Parent [Member] Hedging Relationship [Domain] Noncontrolling Interest [Member] us-gaap_StockholdersEquity Total stockholders’ equity Forfeited, weighted average grant date fair value (in dollars per share) irt_SharebasedCompensationPercentOfIssuableShares Share-Based Compensation, Percent of Issuable Shares The percent of issuable shares for the share-based compensation. Performance Share Units PSU's [Member] Represents the performance share units. us-gaap_PaymentsOfDividendsMinorityInterest Distributions to noncontrolling interests us-gaap_NumberOfRealEstateProperties Number of Real Estate Properties us-gaap_PaymentsOfDividendsCommonStock Distributions on common stock Number of units Number of Units in Real Estate Property Long Term Incentive Plan [Member] Represents the long term incentive plan. Stock, Class of Stock [Table] Nature of Operation, Product Information, Concentration of Risk [Table] Unsecured Revolver [Member] The Unsecured Revolver. us-gaap_OperatingLeaseRightOfUseAsset Operating Lease, Right-of-Use Asset Secured Credit Facilities [Member] The secured credit facilities. Unsecured Term Loans [Member] The unsecured term loans. ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag]