ACQUISITIONS AND DISPOSITIONS - Dispositions (Details) - Disposed of by Sale $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($) apartmentProperty	Jun. 30, 2021 USD ($) apartmentUnit	Jun. 30, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentProperty	0
Sales Price	$ 60,000	$ 60,000	$ 60,000
Book Value and Sales Cost	33,160		33,160
Gain/(Loss)			26,840
Multifamily | Crystal Bay - Rochester, MN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentUnit		76
Sales 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 properties sold | apartmentUnit		40
Sales 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 properties sold | apartmentUnit		182
Sales 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 properties sold | apartmentUnit		140
Sales 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 properties sold | apartmentUnit		151
Sales Price	14,800		14,800
Book Value and Sales Cost	$ 7,010		7,010
Gain/(Loss)			$ 7,790