LOANS HELD-FOR-INVESTMENT - Schedule of Statistics (Details) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2025 USD ($) loan	Dec. 31, 2024 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| loan	76
Net book value	$ 3,194,079	$ 3,370,877
Loans receivable with variable rate of interest	90.60%
Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments	$ 184,100
CRE Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| loan	33	33
Principal balance	$ 3,142,133	$ 3,483,454
Net book value	$ 2,838,179	$ 3,085,104
Weighted-average interest rate	7.30%	7.70%
Weighted-average maximum years to maturity	2 years 1 month 6 days	2 years 3 months 18 days
CRE Loans \| Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments	$ 135,435	$ 217,907
Liquid corporate senior loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| loan	10	15
Principal balance	$ 29,911	$ 42,717
Net book value	$ 24,204	$ 35,653
Weighted-average interest rate	10.20%	9.90%
Weighted-average maximum years to maturity	3 years 2 months 12 days	3 years 8 months 12 days
Liquid corporate senior loans \| Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments	$ 0	$ 0
Corporate senior loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans \| loan	33	20
Principal balance	$ 342,073	$ 258,816
Net book value	$ 331,696	$ 250,120
Weighted-average interest rate	10.00%	10.50%
Weighted-average maximum years to maturity	3 years 1 month 6 days	3 years 6 months
Corporate senior loans \| Unfunded Loan Commitment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unfunded loan commitments	$ 48,627	$ 43,750

Loans Receivable with Variable Rate of Interest, Percentage of Total Loan

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- Definition

Receivable With Imputed Interest, Weighted-Average Maturity

+ References

No definition available.

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- Definition

Number of mortgage loans within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 29
-Paragraph Column A
-Footnote 3
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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-Topic 310
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- Definition

Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
-SubTopic 235
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- Definition

Yield on the receivable, on which interest has been imputed, as calculated from its issuance value or purchase price. The calculated effective interest rate considers factors such as the issued face value or price paid for the receivable, the time period between payments, and the time until maturity [full receipt] of the receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 835
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The principal amount of the receivable or note before consideration of the discount or premium.

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