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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Parenthetical) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
General allowance for credit loss liability on unfunded	$ 5,100	$ 5,900
General CECL allowance on unfunded commitments	$ 5,057	$ 5,948
Germany
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	7.90%	8.40%
Italy
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	2.20%	2.40%
Spain
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio		3.50%
Sweden
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	3.00%	3.10%
Netherlands
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	0.20%	0.30%
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	1.10%	1.30%
Northeast
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	3.30%	0.60%
Southwest
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	1.30%	1.50%
Mid-Atlantic
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	1.30%	1.40%
Residential-for-Sale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	4.00%	5.50%
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	7.20%	4.70%
Senior Housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	7.50%	4.70%
Student Housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	4.10%	4.60%
Vacation Rentals
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	1.80%	2.30%
Pubs
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	2.60%	2.90%
Caravan Park
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	2.40%	2.70%
Urban Predevelopment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of Portfolio	1.60%	1.90%

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No definition available.

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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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Amount of expected credit loss for credit exposure on off-balance-sheet commitment, including but not limited to, loan commitment, standby letter of credit, financial guarantee not accounted for as insurance. Excludes off-balance sheet credit exposure accounted for as insurance and instrument accounted for under derivatives and hedging.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
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-Section 45
-Paragraph 1
-Publisher FASB
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