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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Real Estate Investments (Details) | 12 Months Ended
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Dec. 31, 2025 USD ($) apartmentCommunity | Dec. 31, 2024 USD ($) apartmentCommunity | Dec. 31, 2023 USD ($) apartmentCommunity
Real Estate Properties [Line Items] |  |  |
Real estate investments | $ 1,863,896,000 | $ 1,854,761,000 |
Construction period interest capitalized | 0 | 0 | $ 0
Impairment of real estate investments | $ 37,719,000 | $ 0 | $ 5,218,000
Number of apartment communities impaired during year | apartmentCommunity | 1 |  | 2
Held for sale criteria, transaction completion period, maximum | 1 year |  |
Disposed of by Sale |  |  |
Real Estate Properties [Line Items] |  |  |
Impairment of real estate investments | $ 37,700,000 |  |
Number of apartment communities impaired during year | apartmentCommunity | 6 |  |
Assets Held for Sale |  |  |
Real Estate Properties [Line Items] |  |  |
Number of real estate properties classified as held for sale | apartmentCommunity | 0 | 0 |
Richfield, MN |  |  |
Real Estate Properties [Line Items] |  |  |
Impairment of real estate investments |  |  | $ 3,000,000.0
Number of apartment communities impaired during year | apartmentCommunity |  |  | 1
New Hope, MN |  |  |
Real Estate Properties [Line Items] |  |  |
Impairment of real estate investments |  |  | $ 2,200,000
Number of apartment communities impaired during year | apartmentCommunity |  |  | 1
Minimum | Buildings and Improvements |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 10 years |  |
Minimum | Furniture, Fixtures and Equipment |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 5 years |  |
Minimum | Renovations and Improvements |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 5 years |  |
Maximum | Buildings and Improvements |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 37 years |  |
Maximum | Furniture, Fixtures and Equipment |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 10 years |  |
Maximum | Renovations and Improvements |  |  |
Real Estate Properties [Line Items] |  |  |
Estimated useful life of assets (in years) | 20 years |  |

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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-2 + Details
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- Definition Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(6)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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