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ACQUISITIONS AND DISPOSITIONS - Acquisitions (Details) $ in Thousands |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 01, 2021 USD ($) | Sep. 30, 2021 USD ($) apartmentUnit apartmentProperty | Sep. 30, 2020 USD ($) apartmentUnit | Sep. 30, 2021 USD ($) apartmentUnit apartmentProperty | Sep. 30, 2020 USD ($) apartmentUnit
2021 Acquisitions |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentProperty |  | 17 |  | 17 |
Total Acquisition Cost |  | $ 359,900 |  | $ 436,816 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 92,599 |
Units |  |  |  | 217,513 |
Other |  |  |  | 126,704 |
Investment Allocation |  |  |  |  |
Land |  | 45,580 |  | 45,580 |
Building |  | 375,985 |  | 375,985 |
Intangible Assets |  | 17,604 |  | 17,604 |
Other, Liabilities |  | $ (2,353) |  | $ (2,353) |
Union Pointe Apartment Homes - Longmont, CO |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 256 |  | 256 |
Total Acquisition Cost |  |  |  | $ 76,900 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 76,900 |
Units |  |  |  | 0 |
Other |  |  |  | 0 |
Investment Allocation |  |  |  |  |
Land |  | $ 5,727 |  | 5,727 |
Building |  | 69,966 |  | 69,966 |
Intangible Assets |  | 1,207 |  | 1,207 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Bayberry Place - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 120 |  | 120 |
Total Acquisition Cost |  |  |  | $ 16,673 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 898 |
Units |  |  |  | 9,855 |
Other |  |  |  | 5,920 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,807 |  | 1,807 |
Building |  | 14,113 |  | 14,113 |
Intangible Assets |  | 753 |  | 753 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Burgandy & Hillsboro Court - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 251 |  | 251 |
Total Acquisition Cost |  |  |  | $ 35,569 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 2,092 |
Units |  |  |  | 22,542 |
Other |  |  |  | 10,935 |
Investment Allocation |  |  |  |  |
Land |  | $ 2,834 |  | 2,834 |
Building |  | 31,148 |  | 31,148 |
Intangible Assets |  | 1,587 |  | 1,587 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Venue on Knox - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 97 |  | 97 |
Total Acquisition Cost |  |  |  | $ 18,896 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 500 |
Units |  |  |  | 11,375 |
Other |  |  |  | 7,021 |
Investment Allocation |  |  |  |  |
Land |  | $ 3,438 |  | 3,438 |
Building |  | 14,743 |  | 14,743 |
Intangible Assets |  | 715 |  | 715 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Gatewood - St. Cloud, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 120 |  | 120 |
Total Acquisition Cost |  |  |  | $ 7,781 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 378 |
Units |  |  |  | 3,388 |
Other |  |  |  | 4,015 |
Investment Allocation |  |  |  |  |
Land |  | $ 327 |  | 327 |
Building |  | 6,858 |  | 6,858 |
Intangible Assets |  | 596 |  | 596 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Grove Ridge - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 84 |  | 84 |
Total Acquisition Cost |  |  |  | $ 12,060 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 121 |
Units |  |  |  | 8,579 |
Other |  |  |  | 3,360 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,250 |  | 1,250 |
Building |  | 10,271 |  | 10,271 |
Intangible Assets |  | 539 |  | 539 |
Other, Liabilities |  | $ 0 |  | $ 0 |
The Legacy - St. Cloud, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 119 |  | 119 |
Total Acquisition Cost |  |  |  | $ 10,560 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 229 |
Units |  |  |  | 5,714 |
Other |  |  |  | 4,617 |
Investment Allocation |  |  |  |  |
Land |  | $ 412 |  | 412 |
Building |  | 9,556 |  | 9,556 |
Intangible Assets |  | 592 |  | 592 |
Other, Liabilities |  | $ 0 |  | $ 0 |
New Hope Garden & Village - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 151 |  | 151 |
Total Acquisition Cost |  |  |  | $ 15,006 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 1,435 |
Units |  |  |  | 10,812 |
Other |  |  |  | 2,759 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,603 |  | 1,603 |
Building |  | 12,578 |  | 12,578 |
Intangible Assets |  | 825 |  | 825 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Palisades - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 330 |  | 330 |
Total Acquisition Cost |  |  |  | $ 53,354 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 2,884 |
Units |  |  |  | 30,470 |
Other |  |  |  | 20,000 |
Investment Allocation |  |  |  |  |
Land |  | $ 6,919 |  | 6,919 |
Building |  | 46,577 |  | 46,577 |
Intangible Assets |  | 2,211 |  | 2,211 |
Other, Liabilities |  | $ (2,353) |  | $ (2,353) |
Plymouth Pointe - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 96 |  | 96 |
Total Acquisition Cost |  |  |  | $ 14,450 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 370 |
Units |  |  |  | 9,061 |
Other |  |  |  | 5,019 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,042 |  | 1,042 |
Building |  | 12,809 |  | 12,809 |
Intangible Assets |  | 599 |  | 599 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Pointe West - St. Cloud, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 93 |  | 93 |
Total Acquisition Cost |  |  |  | $ 7,558 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 91 |
Units |  |  |  | 3,605 |
Other |  |  |  | 3,862 |
Investment Allocation |  |  |  |  |
Land |  | $ 246 |  | 246 |
Building |  | 6,849 |  | 6,849 |
Intangible Assets |  | 463 |  | 463 |
Other, Liabilities |  | $ 0 |  | $ 0 |
River Pointe - Minneapolis MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 301 |  | 301 |
Total Acquisition Cost |  |  |  | $ 38,348 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 2,249 |
Units |  |  |  | 21,653 |
Other |  |  |  | 14,446 |
Investment Allocation |  |  |  |  |
Land |  | $ 3,346 |  | 3,346 |
Building |  | 33,117 |  | 33,117 |
Intangible Assets |  | 1,885 |  | 1,885 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Southdale Parc - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 70 |  | 70 |
Total Acquisition Cost |  |  |  | $ 9,670 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 165 |
Units |  |  |  | 7,907 |
Other |  |  |  | 1,598 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,569 |  | 1,569 |
Building |  | 7,740 |  | 7,740 |
Intangible Assets |  | 361 |  | 361 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Portage - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 62 |  | 62 |
Total Acquisition Cost |  |  |  | $ 9,171 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 323 |
Units |  |  |  | 5,588 |
Other |  |  |  | 3,260 |
Investment Allocation |  |  |  |  |
Land |  | $ 2,133 |  | 2,133 |
Building |  | 6,685 |  | 6,685 |
Intangible Assets |  | 353 |  | 353 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Windsor Gates - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 200 |  | 200 |
Total Acquisition Cost |  |  |  | $ 22,231 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 1,122 |
Units |  |  |  | 12,080 |
Other |  |  |  | 9,029 |
Investment Allocation |  |  |  |  |
Land |  | $ 2,140 |  | 2,140 |
Building |  | 18,943 |  | 18,943 |
Intangible Assets |  | 1,148 |  | 1,148 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Wingate - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 136 |  | 136 |
Total Acquisition Cost |  |  |  | $ 15,784 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 723 |
Units |  |  |  | 10,246 |
Other |  |  |  | 4,815 |
Investment Allocation |  |  |  |  |
Land |  | $ 1,480 |  | 1,480 |
Building |  | 13,530 |  | 13,530 |
Intangible Assets |  | 774 |  | 774 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Woodhaven - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 178 |  | 178 |
Total Acquisition Cost |  |  |  | $ 25,009 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 1,682 |
Units |  |  |  | 15,200 |
Other |  |  |  | 8,127 |
Investment Allocation |  |  |  |  |
Land |  | $ 3,940 |  | 3,940 |
Building |  | 20,080 |  | 20,080 |
Intangible Assets |  | 989 |  | 989 |
Other, Liabilities |  | $ 0 |  | $ 0 |
Woodland Pointe - Minneapolis, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  | 288 |  | 288 |
Total Acquisition Cost |  |  |  | $ 47,796 |
Form of Consideration |  |  |  |  |
Cash |  |  |  | 437 |
Units |  |  |  | 29,438 |
Other |  |  |  | 17,921 |
Investment Allocation |  |  |  |  |
Land |  | $ 5,367 |  | 5,367 |
Building |  | 40,422 |  | 40,422 |
Intangible Assets |  | 2,007 |  | 2,007 |
Other, Liabilities |  | $ 0 |  | $ 0 |
2020 Acquisitions |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total Acquisition Cost |  |  | $ 144,800 |  | $ 191,013
Form of Consideration |  |  |  |  |
Cash |  |  |  |  | 173,350
Other |  |  |  |  | 17,663
Investment Allocation |  |  |  |  |
Land |  |  | 12,639 |  | 12,639
Building |  |  | 168,974 |  | 168,974
Intangible Assets |  |  | 2,995 |  | 2,995
Other, Assets |  |  | $ 6,405 |  | $ 6,405
2020 Acquisitions | Series E Preferred Units |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Total Acquisition Cost | $ 36,100 |  |  |  |
Ironwood Apartments - New Hope, MN |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  |  | 182 |  | 182
Total Acquisition Cost |  |  |  |  | $ 46,263
Form of Consideration |  |  |  |  |
Cash |  |  |  |  | 28,600
Other |  |  |  |  | 17,663
Investment Allocation |  |  |  |  |
Land |  |  | $ 2,165 |  | 2,165
Building |  |  | 36,869 |  | 36,869
Intangible Assets |  |  | 824 |  | 824
Other, Assets |  |  | $ 6,405 |  | $ 6,405
Parkhouse Apartment Homes - Thornton, CO |  |  |  |  |
Acquisitions and development projects placed in service [Abstract] |  |  |  |  |
Number of homes | apartmentUnit |  |  | 465 |  | 465
Total Acquisition Cost |  |  |  |  | $ 144,750
Form of Consideration |  |  |  |  |
Cash |  |  |  |  | 144,750
Other |  |  |  |  | 0
Investment Allocation |  |  |  |  |
Land |  |  | $ 10,474 |  | 10,474
Building |  |  | 132,105 |  | 132,105
Intangible Assets |  |  | 2,171 |  | 2,171
Other, Assets |  |  | $ 0 |  | $ 0

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