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ACQUISITIONS AND DISPOSITIONS - Dispositions (Details) - Disposed of by Sale $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) apartmentUnit apartmentProperty | Sep. 30, 2020 USD ($) apartmentUnit apartmentProperty | Sep. 30, 2021 USD ($) apartmentUnit | Sep. 30, 2020 USD ($) apartmentUnit
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of properties sold | apartmentProperty | 0 |  |  |
Sale Price | $ 60,000 | $ 44,300 | $ 60,000 | $ 44,300
Book Value and Sales Cost | $ 33,160 | $ 18,828 | 33,160 | 18,828
Gain/(Loss) |  |  | $ 26,840 | 25,472
Multifamily |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of properties sold | apartmentProperty |  | 4 |  |
Sale Price |  | $ 42,500 |  | 42,500
Book Value and Sales Cost |  | $ 16,864 |  | 16,864
Gain/(Loss) |  |  |  | $ 25,636
Multifamily | Crystal Bay - Rochester, MN |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit | 76 |  | 76 |
Sale Price | $ 13,650 |  | $ 13,650 |
Book Value and Sales Cost | $ 10,255 |  | 10,255 |
Gain/(Loss) |  |  | $ 3,395 |
Multifamily | French Creek - Rochester, MN |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit | 40 |  | 40 |
Sale Price | $ 6,700 |  | $ 6,700 |
Book Value and Sales Cost | $ 4,474 |  | 4,474 |
Gain/(Loss) |  |  | $ 2,226 |
Multifamily | Heritage Manor- Rochester, MN |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit | 182 |  | 182 |
Sale Price | $ 14,125 |  | $ 14,125 |
Book Value and Sales Cost | $ 4,892 |  | 4,892 |
Gain/(Loss) |  |  | $ 9,233 |
Multifamily | Olympik Village - Rochester, MN |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit | 140 |  | 140 |
Sale Price | $ 10,725 |  | $ 10,725 |
Book Value and Sales Cost | $ 6,529 |  | 6,529 |
Gain/(Loss) |  |  | $ 4,196 |
Multifamily | Winchester/Village Green-Rochester, MN |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit | 151 |  | 151 |
Sale Price | $ 14,800 |  | $ 14,800 |
Book Value and Sales Cost | $ 7,010 |  | 7,010 |
Gain/(Loss) |  |  | $ 7,790 |
Multifamily | Forest Park - Grand Forks, ND |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit |  | 268 |  | 268
Sale Price |  | $ 19,625 |  | $ 19,625
Book Value and Sales Cost |  | $ 6,884 |  | 6,884
Gain/(Loss) |  |  |  | $ 12,741
Multifamily | Landmark - Grand Forks, ND |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit |  | 90 |  | 90
Sale Price |  | $ 3,725 |  | $ 3,725
Book Value and Sales Cost |  | $ 1,348 |  | 1,348
Gain/(Loss) |  |  |  | $ 2,377
Multifamily | Southwind - Grand Forks, ND |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit |  | 164 |  | 164
Sale Price |  | $ 10,850 |  | $ 10,850
Book Value and Sales Cost |  | $ 4,573 |  | 4,573
Gain/(Loss) |  |  |  | $ 6,277
Multifamily | Valley Park - Grand Forks, ND |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of apartment units | apartmentUnit |  | 168 |  | 168
Sale Price |  | $ 8,300 |  | $ 8,300
Book Value and Sales Cost |  | $ 4,059 |  | 4,059
Gain/(Loss) |  |  |  | 4,241
Other |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Number of properties sold | apartmentProperty |  | 1 |  |
Other | Dakota West |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Sale Price |  | $ 500 |  | 500
Book Value and Sales Cost |  | 474 |  | 474
Gain/(Loss) |  |  |  | 26
Real Estate Property Excluding Unimproved Land |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Sale Price |  | 43,000 |  | 43,000
Unimproved Land | Rapid City Land - Rapid City, SD |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Sale Price |  | 1,300 |  | 1,300
Book Value and Sales Cost |  | $ 1,490 |  | 1,490
Gain/(Loss) |  |  |  | $ (190)

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