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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Overall Statistics for Loan Portfolio (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) Loan	Dec. 31, 2023 USD ($) Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans | Loan	45	50
Principal balance	$ 7,864,803	$ 8,384,575
Carrying value, net	7,830,611	8,358,093
Unfunded loan commitments	$ 503,858	$ 868,582
Weighted-average cash coupon	8.10%	8.30%
Weighted-average remaining fully-extended term	2 years 6 months	2 years 3 months 18 days
Weighted-average expected term	1 year 9 months 18 days	1 year 9 months 18 days
Principal Balance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance	$ 8,243,398	$ 8,610,110

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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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-5

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