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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Loan Portfolio (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Feb. 28, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Commercial mortgage loans, net |  | $ 8,303,645 |  |  | $ 7,104,156 |
Carrying value, net |  | 8,303,645 |  |  | 7,145,356 |
Note receivable |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Financing Receivable, Held-for-Sale |  | 0 |  |  | 41,200 |
Commercial Mortgage Portfolio Segment |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Commercial mortgage loans, net | [1],[2] | 8,149,855 |  |  | 6,715,347 |
Subordinate Mortgage Portfolio Segment |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |
Commercial mortgage loans, net |  | $ 153,790 | [2] | $ 24,000 | $ 388,809 | [2]
[1] | Inclu des carrying value of $8,025,026 and $6,715,347 pledged as collateral under secured debt arrangements in 2025 and 2024, respectively.
[2] | Net of $374,257 and $373,336 CECL Allowances comprised $39,257 and $30,836 General CECL Allowance in 2025 and 2024, respectively, and $335,000 and $342,500 Specific CECL Allowance in 2025 and 2024, respectively.

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