DEBT - Narrative (Details)		9 Months Ended	12 Months Ended
DEBT - Narrative (Details)	Jul. 26, 2024 extensionOption	Sep. 30, 2025 USD ($) apartmentCommunity loan	Dec. 31, 2024 USD ($) apartmentCommunity	May 31, 2025 USD ($)	Apr. 30, 2025 USD ($)	Oct. 28, 2024 USD ($)	Sep. 30, 2024 USD ($)
Line of Credit Facility [Line Items]
Number of real estate properties, unencumbered by mortgages \| apartmentCommunity		44
Revolving lines of credit		$ 222,500,000	$ 47,359,000
Outstanding debt		$ 1,177,284,000	$ 966,623,000
Weighted average interest rate		3.80%	3.58%
Mortgages
Line of Credit Facility [Line Items]
Outstanding debt		$ 455,900,000	$ 420,400,000
Number of real estate properties, serving as collateral for mortgage loans \| apartmentCommunity		13	15
Number of material defaults or instances of noncompliance \| loan		0
Private Shelf Agreement \| Unsecured Senior Notes
Line of Credit Facility [Line Items]
Outstanding debt		$ 175,000,000.0
Debt instrument, maximum borrowing capacity						$ 300,000,000.0
Note Purchase Agreement \| Unsecured Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount		125,000,000.0
Fannie Mae Credit Facility Agreement \| Mortgages
Line of Credit Facility [Line Items]
Outstanding debt		198,850,000	$ 198,850,000
Debt instrument, face amount		$ 198,900,000
Number of real estate properties, serving as collateral for mortgage loans \| apartmentCommunity		11
Weighted average interest rate		2.78%	2.78%
Fannie Mae Credit Facility Agreement \| Mortgages \| Interest Only Payment Date One
Line of Credit Facility [Line Items]
Term of debt		7 years
Fannie Mae Credit Facility Agreement \| Mortgages \| Interest Only Payment Date Two
Line of Credit Facility [Line Items]
Term of debt		10 years
Fannie Mae Credit Facility Agreement \| Mortgages \| Interest Only Payment Date Three
Line of Credit Facility [Line Items]
Term of debt		12 years
Line of Credit \| BMO Line of Credit
Line of Credit Facility [Line Items]
Accordion option				$ 150,000,000.0
Maximum borrowing capacity				$ 400,000,000.0	$ 250,000,000.0
Remaining borrowing capacity		$ 177,500,000	$ 206,000,000.0
Revolving lines of credit		$ 222,500,000	$ 44,000,000.0
Interest rate		5.51%	5.81%
Number of extensions \| extensionOption	2
Debt extension term	6 months
Line of Credit \| BMO Line of Credit \| Minimum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.20%
Line of Credit \| BMO Line of Credit \| Minimum \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.20%
Line of Credit \| BMO Line of Credit \| Maximum \| Base Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.80%
Line of Credit \| BMO Line of Credit \| Maximum \| Secured Overnight Financing Rate (SOFR)
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.80%
Operating Line of Credit \| US Bank NA
Line of Credit Facility [Line Items]
Maximum borrowing capacity							$ 10,000,000.0
Revolving lines of credit		$ 0	$ 3,400,000

CENTERSPACE 10-Q