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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Loan Portfolio (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total carrying value, net |  | $ 8,472,068 | $ 8,681,990
Commercial Mortgage and Subordinated Portfolio Segment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total carrying value, net |  | 134,700 | 138,300
Commercial Mortgage Portfolio Segment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total carrying value, net | [1],[2] | 7,879,205 | 8,121,109
Subordinate Mortgage Portfolio Segment |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Total carrying value, net | [2],[3] | $ 592,863 | $ 560,881
[1] | Includes $7,426,992 and $7,482,658 pledged as collateral under secured debt arrangements in 2023 and 2022, respectively.
[2] | Net of $163,767 and $159,724 CECL Allowance in 2023 and 2022, respectively, comprised of $133,500 and $133,500 Specific CECL Allowance and $30,267 and $26,224 General CECL Allowance, respectively.
[3] | Includes $194,323 and $191,608 pledged as collateral under secured debt arrangements in 2023 and 2022, respectively.

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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 No definition available. + Details
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910 + Details
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