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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Principles of Consolidation and Basis of Presentation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Mar. 31, 2026	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value		$ 3,088,361	$ 3,454,589
Investments in real estate-related securities		167,582	169,206
Debt outstanding		2,726,397	$ 3,093,039
CMBS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in real estate-related securities		109,039
CLO subordinated note
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in real estate-related securities		17,337
Investment in equity securities	$ 27,600
VIE, Primary Beneficiary \| CIM Commercial Lending REIT (CLR) \| Senior Secured Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net book value		1,300,000
VIE, Primary Beneficiary \| CIM Commercial Lending REIT (CLR) \| CMBS
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in real estate-related securities		63,500
VIE, Primary Beneficiary \| NP JV Holdings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equity securities		115,500
VIE, Not Primary Beneficiary \| CIM Commercial Lending REIT (CLR)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt outstanding		1,000,000
VIE, Not Primary Beneficiary \| OFSI BSL XIV CLO, Ltd
Accounts, Notes, Loans and Financing Receivable [Line Items]
Equity securities		$ 17,300