RELATED-PARTY TRANSACTIONS AND ARRANGEMENTS - Development and Property Management Agreements and Investments with Affiliates of the Manager (Details) $ in Thousands			1 Months Ended			3 Months Ended		9 Months Ended		12 Months Ended	47 Months Ended
	Jan. 09, 2025	Jan. 07, 2021 building unit	Apr. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 31, 2021 USD ($)	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) property loan	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) loan	Sep. 30, 2025 USD ($)	Sep. 30, 2021 USD ($)
Related Party Transaction [Line Items]
Number of real estate properties secured through foreclosure \| property								2
Management fees						$ 11,681	$ 12,202	$ 35,092	$ 37,506
Payments to acquire finance receivables					$ 119,000
Payments to acquire equity method investments								25,919	28,220
Return of investment in unconsolidated entities								45,602	397
Proceeds from sale of first mortgage loan								$ 4,788	446,974
CLO subordinated note
Related Party Transaction [Line Items]
Investment in equity securities										$ 27,600
MT-FT JV
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						50.00%		50.00%			50.00%
Equity method investments						$ 212,500		$ 212,500			$ 212,500
New Point JV, LLC
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						46.00%		46.00%			46.00%
Equity method investments						$ 163,000		$ 163,000		181,400	$ 163,000
Payments to acquire equity method investments											$ 163,300
N P J V Holdings
Related Party Transaction [Line Items]
Equity method investment, ownership percentage						50.00%		50.00%			50.00%
Return of investment in unconsolidated entities								$ 41,200			$ 100,900
Preferred equity security
Related Party Transaction [Line Items]
Related party investments												$ 68,400
Mortgage Loan
Related Party Transaction [Line Items]
Related party investments						$ 199,900		$ 199,900			199,900	$ 138,800
Development Management Agreements
Related Party Transaction [Line Items]
Termination period (in days)								15 days
Due to affiliates \| Liquid corporate senior loans
Related Party Transaction [Line Items]
Proceeds from sale of first mortgage loan										$ 259,700
Number of liquid corporate senior loans closed \| loan										185
Loan sales, traded										$ 265,400
Loss on sale of loans receivable										$ (2,900)
CIM NY Management, LLC \| Development Management Agreements
Related Party Transaction [Line Items]
Management fee, percentage	4.00%	4.00%
Management fees								$ 318	$ 563
Termination period (in days)	15 days
Operating receipt percentage	1.50%
First Mortgage Loans
Related Party Transaction [Line Items]
Loans held-for-investment and related receivables, net					$ 130,000
Payments to acquire finance receivables			$ 143,000
Advances to affiliate						98,000		98,000			98,000
Equity method investments			$ 147,000
First Mortgage Loans \| CIM Commercial Lending REIT (CLR)
Related Party Transaction [Line Items]
Proceeds from sale of first mortgage loan								120,000
First Mortgage Loans \| Third-Party, Number Two
Related Party Transaction [Line Items]
Advances to affiliate						120,200		120,200			120,200
First Mortgage Loans \| Due to affiliates
Related Party Transaction [Line Items]
Loans held-for-investment and related receivables, net				$ 155,000
Payments to acquire finance receivables				$ 154,000
First Mortgage Loans \| Due to affiliates \| Third-Party, Number One \| Maximum
Related Party Transaction [Line Items]
Advances to affiliate						155,000		155,000			155,000
Corporate senior loans \| Investment in Corporate Senior Loans
Related Party Transaction [Line Items]
Loans held-for-investment and related receivables, net						13,000		13,000			13,000
Advances to affiliate						153,200		$ 153,200			153,200
Number of loans \| loan								3
Corporate senior loans \| Investment in Corporate Senior Loans \| CIM RACR
Related Party Transaction [Line Items]
Loans held-for-investment and related receivables, net						1,600		$ 1,600			1,600
Advances to affiliate						$ 153,200		$ 153,200			$ 153,200
Number of loans \| loan								11
Condominium Units \| Foreclosure Of Mezzanine Loans \| Consolidated Properties
Related Party Transaction [Line Items]
Number of real estate properties secured through foreclosure \| unit		75
Rental Units \| Foreclosure Of Mezzanine Loans \| Consolidated Properties
Related Party Transaction [Line Items]
Number of real estate properties secured through foreclosure \| unit		21
Buildings \| Foreclosure Of Mezzanine Loans \| Consolidated Properties
Related Party Transaction [Line Items]
Number of real estate properties secured through foreclosure \| building		4

CIM REAL ESTATE FINANCE TRUST, INC. 10-Q