ACQUISITIONS AND DISPOSITIONS - Dispositions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) apartmentHome transaction apartmentProperty	Dec. 31, 2022 apartmentCommunity
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]	Gain on sale of real estate and other investments
Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentProperty	13
Disposed of by Sale | 2023 Disposals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of disposal transactions during period | transaction	5
Sales Price	$ 226,755
Book Value and Sales Cost	155,515
Gain/(Loss)	$ 71,240
Disposed of by Sale | 2022 Disposals
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentCommunity		0
Boulder Court - Eagan, MN | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentHome	115
Sales Price	$ 14,605
Book Value and Sales Cost	4,971
Gain/(Loss)	$ 9,634
2 Nebraska apartment communities | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentHome	498
Sales Price	$ 48,500
Book Value and Sales Cost	15,025
Gain/(Loss)	$ 33,475
5 Minnesota apartment communities | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentHome	892
Sales Price	$ 74,500
Book Value and Sales Cost	55,186
Gain/(Loss)	$ 19,314
Portage - Minneapolis, MN | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentHome	62
Sales Price	$ 6,650
Book Value and Sales Cost	9,098
Gain/(Loss)	$ (2,448)
4 North Dakota Apartment Communities | Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties sold | apartmentHome	712
Sales Price	$ 82,500
Book Value and Sales Cost	71,235
Gain/(Loss)	$ 11,265