Line of Credit Facility, Accordion Feature, Higher Borrowing Capacity Option

No definition available.

Name:	irt_LineOfCreditFacilityAccordionFeatureHigherBorrowingCapacityOption
Namespace Prefix:	irt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Amount of increase (decrease) of the credit facility.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

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Balance Type:	credit
Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Indebtedness - Additional Information (Detail) - USD ($)		6 Months Ended
	Jul. 25, 2022	Jun. 30, 2022	Dec. 31, 2021
Restated Credit Agreement \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	$ 1,100,000,000
Increase in line of credit facility	100,000,000
Debt instrument, maximum increase amount	1,500,000,000
Unsecured revolver
Debt Instrument [Line Items]
Credit facility borrowing capacity		$ 500,000,000	$ 500,000,000
Term Loan Facility \| January 2024 Term Loan \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	200,000,000
Term Loan Facility \| November 2024 Term Loan \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	100,000,000
Term Loan Facility \| 2026 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.20%
Term Loan Facility \| 2026 Term Loan \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	200,000,000
Term Loan Facility \| 2028 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.15%
Term Loan Facility \| 2028 Term Loan \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	400,000,000
Term Loan Facility \| Minimum \| SOFR rate \| 2026 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.20%
Term Loan Facility \| Minimum \| SOFR rate \| 2028 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.15%
Term Loan Facility \| Minimum \| Base Rate \| 2026 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		0.20%
Term Loan Facility \| Minimum \| Base Rate \| 2028 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		0.15%
Term Loan Facility \| Maximum \| SOFR rate \| 2026 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.90%
Term Loan Facility \| Maximum \| SOFR rate \| 2028 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.80%
Term Loan Facility \| Maximum \| Base Rate \| 2026 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		0.90%
Term Loan Facility \| Maximum \| Base Rate \| 2028 Term Loan
Debt Instrument [Line Items]
Debt. basis spread on variable rate		0.80%
Unsecured Revolving Line of Credit
Debt Instrument [Line Items]
Repayments of long-term lines of credit		$ 100,000,000
Debt. basis spread on variable rate		1.25%
Unsecured Revolving Line of Credit \| Subsequent Event
Debt Instrument [Line Items]
Credit facility borrowing capacity	$ 500,000,000
Unsecured Revolving Line of Credit \| Minimum \| SOFR rate
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.25%
Unsecured Revolving Line of Credit \| Minimum \| Base Rate
Debt Instrument [Line Items]
Debt. basis spread on variable rate		0.25%
Unsecured Revolving Line of Credit \| Maximum \| SOFR rate
Debt Instrument [Line Items]
Debt. basis spread on variable rate		2.00%
Unsecured Revolving Line of Credit \| Maximum \| Base Rate
Debt Instrument [Line Items]
Debt. basis spread on variable rate		1.00%