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v3.23.1

Summary of Significant Accounting Policies - Additional Information (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2023 USD ($) property | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($)
Significant Accounting Policies [Line Items] |  |  |
Restricted cash | $ 22,385,000 |  | $ 27,933,000
Acquisition of above-market in-place leases, amortization period | 6 months |  |
Amortization expense for intangible assets | $ 399,000 | $ 29,082,000 |
Write-off of fully amortized intangible assets | 1,099,000 | 0 |
Merger and integration cots | 0 | 1,895,000 |
Depreciation expense | 52,887,000 | 49,092,000 |
Fully depreciated fixed assets, wrote-off | 2,920,000 | 1,160,000 |
Casualty gains (losses), net | (151,000) | 1,393,000 |
Interest costs capitalized | $ 1,454,000 | 301,000 |
Number of multifamily properties owned | property | 119 |  |
Investment in real estate under development | $ 124,983,000 |  | 105,518,000
Right-of-use assets | 2,914,000 |  |
Lease liability | 3,237,000 |  |
Total operating lease expense | 210,000 | 461,000 |
Income tax expense | 0 | 0 |
Proceeds from retention credit refunds |  |  | 6,238,000
Reimbursements costs |  |  | $ 3,006,000
Restructuring costs | $ (3,213,000) | 0 |
Denver Colorado | Real Estate Investment |  |  |
Significant Accounting Policies [Line Items] |  |  |
Number of multifamily properties owned | property | 2 |  |
Views of Music City II / The Crockett | Nashville, TN |  |  |
Significant Accounting Policies [Line Items] |  |  |
IRT ownership interest | 50.00% |  |
Lakeline Station | Austin, TX |  |  |
Significant Accounting Policies [Line Items] |  |  |
IRT ownership interest | 90.00% |  |
Investments In Unconsolidated Real Estate Entities |  |  |
Significant Accounting Policies [Line Items] |  |  |
Interest costs capitalized | $ 1,006,000 | $ 210,000 |
Property Operating Expenses |  |  |
Significant Accounting Policies [Line Items] |  |  |
Proceeds from retention credit refunds | 788,000 |  |
Property Management Expenses |  |  |
Significant Accounting Policies [Line Items] |  |  |
Proceeds from retention credit refunds | 195,000 |  |
General and Administrative Expense |  |  |
Significant Accounting Policies [Line Items] |  |  |
Proceeds from retention credit refunds | $ 74,000 |  |
Building and Building Improvements |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciable Lives (In years) | 40 years |  |
Minimum | Equipment and Fixtures |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciable Lives (In years) | 5 years |  |
Maximum |  |  |
Significant Accounting Policies [Line Items] |  |  |
Operating lease term | 10 years |  |
Maximum | Equipment and Fixtures |  |  |
Significant Accounting Policies [Line Items] |  |  |
Depreciable Lives (In years) | 10 years |  |

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