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Loans - Narrative (Details) € in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 USD ($) | May 31, 2025 USD ($) | Feb. 28, 2025 USD ($) | May 31, 2023 USD ($) | Dec. 31, 2025 USD ($) loan Item | Dec. 31, 2024 USD ($) Item loan | Dec. 31, 2023 USD ($) Item | Dec. 31, 2025 EUR (€) loan
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 21,627,097,000 | $ 18,401,316,000 |  |
Loan foreclosure and equity control |  |  |  |  | 196,543,000 | 351,131,000 | $ 102,774,000 |
Properties, net |  |  |  |  | 3,448,652,000 | 1,373,678,000 |  |
Unpaid principal balance |  |  |  |  | 21,922,738,000 | 18,771,668,000 |  |
Other Modifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Amortized cost basis of loans modified |  |  |  |  | $ 299,800,000 | $ 784,900,000 | 0 |
Number of loans modified | loan |  |  |  |  | 4 | 12 |  |
Number of loans modified further | loan |  |  |  |  |  | 4 |  |
Amortized cost basis of loans modified further |  |  |  |  | $ 303,000,000.0 |  |  |
Non-Credit Deterioration |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | $ 1,000,000,000.0 |  |
Commercial loans: |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | 16,464,698,000 |  |  |
Value of loans placed on nonaccrual |  |  |  |  | 179,000,000.0 |  |  |
Nonaccrual loans resolved |  |  |  |  | 238,000,000.0 |  |  |
Amortized cost basis of loans modified |  |  |  |  |  | $ 1,500,000,000 | $ 337,600,000 |
Percentage of commercial loans amortized cost basis |  |  |  |  |  | 11.00% | 200.00% |
Number of loans modified |  |  |  |  |  | 9 | 3 |
Commercial loans: | Office Assets |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of loans collateralized | Item |  |  |  |  |  | 6 |  |
Commercial loans: | Mixed-Use Assets |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of loans collateralized | Item |  |  |  |  |  | 2 |  |
Commercial loans: | Extended Maturity and Interest Rate Reduction |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | $ 1,100,000,000 |  |
Amortized cost basis of loans modified |  |  |  |  | $ 33,200,000 |  |  |
Percentage of commercial loans amortized cost basis |  |  |  |  | 0.20% |  |  | 0.20%
Granted team extension period |  |  |  |  | 50 months | 21 months |  |
Extension option term |  |  |  |  | 1 year |  |  |
Interest rate before modification |  |  |  |  | 7.00% |  |  | 7.00%
Number of loans modified | loan |  |  |  |  |  | 7 |  |
Unfunded commitments |  |  |  |  |  | $ 42,600,000 |  |
Preferred equity commitment |  |  |  |  |  | 31,500,000 |  |
Preferred equity commitment, amount unfunded |  |  |  |  |  | $ 29,300,000 |  |
Weighted average interest rate after modification |  |  |  |  |  | 2.36% |  |
Number of loans with additional commitments | Item |  |  |  |  |  | 4 |  |
Commercial loans: | Extended Maturity |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | $ 358,700,000 |  |
Granted team extension period |  |  |  |  |  | 30 months |  |
Number of loans modified | loan |  |  |  |  |  | 2 |  |
Unfunded commitments |  |  |  |  |  | $ 6,300,000 |  |
Preferred equity commitment |  |  |  |  |  | 30,000,000.0 |  |
Preferred equity commitment, amount unfunded |  |  |  |  |  | 21,800,000 |  |
Commercial loans: | First Mortgage Loan | Extended Maturity |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  |  | $ 197,200,000 |
Granted team extension period |  |  |  |  |  |  | 19 months |
Preferred equity commitment |  |  |  |  |  |  | $ 25,100,000 |
Preferred equity commitment, amount unfunded |  |  |  |  |  |  | $ 15,500,000 |
Commercial loans: | First Mortgage Loan | Contractual Interest Rate Reduction |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Decrease in interest rate |  |  |  |  |  |  | 0.50% |
Commercial loans: | First Mortgage Loan | Contractual Interest Rate Reduction | Office Campus |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  |  | $ 95,500,000 |
Basis spread |  |  |  |  |  |  | 6.00% |
Payments received from loan modifications |  |  |  |  |  |  | $ 2,500,000 |
Commercial loans: | First Mortgage Loan | Contractual Interest Rate Reduction | Multifamily Property |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  |  | $ 44,900,000 |
Commercial loans: | Mezzanine Loans |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Unpaid principal balance |  |  |  |  | $ 30,100,000 |  |  | € 25.6
Interest rate |  |  |  |  | 15.00% |  |  |
Amount advanced |  |  |  |  | $ 3,300,000 |  |  |
Commercial loans: | Senior Loans | Chicago |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Loan foreclosure and equity control |  |  |  | $ 41,100,000 |  |  |  |
Commercial loans: | First Mortgage and Mezzanine |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of loans restructured | loan |  |  |  |  | 2 |  |  |
Commercial loans: | First Mortgage and Mezzanine | Vacant Office |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 99,400,000 |  |  |
Unfunded commitments |  |  |  |  | 1,200,000 |  |  |
Commercial loans: | First Mortgage and Mezzanine | School Units |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | 102,500,000 |  |  |
Unfunded commitments |  |  |  |  | $ 53,500,000 |  |  |
Commercial loans: | First Mortgage and Mezzanine | Extended Maturity |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
New lease occupancy percentage |  |  |  |  | 100.00% |  |  |
Commercial loans: | First Mortgage and Mezzanine | Extended Maturity | Vacant Office |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Granted team extension period |  |  |  |  | 13 months |  |  |
Commercial loans: | First Mortgage and Mezzanine | Extended Maturity | School Units |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Granted team extension period |  |  |  |  | 3 years 7 months 6 days |  |  |
Extension option term |  |  |  |  | 1 year |  |  |
Number of extension options | Item |  |  |  |  | 2 |  |  |
Commercial loans: | First Mortgage and Mezzanine | Other Modifications |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | 277,000,000.0 |  |
Commercial loans: | First Mortgage and Mezzanine | Other Modifications | College Unit |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | $ 152,300,000 |  |
Mortgage loans term |  |  |  |  |  | 27 years |  |
Commercial loans: | First Mortgage and Mezzanine | Other Modifications | Vacant Office |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 139,600,000 | $ 124,700,000 |  |
Unfunded commitments |  |  |  |  | $ 8,800,000 |  |  |
Number of loans restructured | loan |  |  |  |  | 2 |  |  |
Commercial loans: | First Mortgage and Mezzanine | Massachusetts |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Specific credit loss allowance | $ 17,200,000 |  |  |  |  |  |  |
Loan foreclosure and equity control | 55,700,000 |  |  |  |  |  |  |
Properties, net | $ 55,700,000 |  |  |  |  |  |  |
Commercial loans: | First Mortgage and Mezzanine | Windermere, Florida |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Loan foreclosure and equity control |  | $ 83,900,000 |  |  |  |  |  |
Properties, net |  | $ 83,900,000 |  |  |  |  |  |
Commercial loans: | First Mortgage and Mezzanine | Georgia |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Loan foreclosure and equity control |  |  | $ 45,000,000.0 |  |  |  |  |
Properties, net |  |  | $ 45,000,000.0 |  |  |  |  |
Commercial loans: | Additional Mezzanine Loan | Extended Maturity |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | 98,200,000 |  |
Unfunded commitments |  |  |  |  |  | 76,600,000 |  |
Commercial loans: | Junior Mezzanine Loan | Extended Maturity and Interest Rate Reduction |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  |  | 18,200,000 |  |
Unfunded commitments |  |  |  |  |  | $ 8,800,000 |  |
Commercial loans: | Credit deteriorated |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of mortgage loans | loan |  |  |  |  | 3 |  |  | 3
Carrying Value |  |  |  |  | $ 132,189,000 |  |  |
Amortized cost basis |  |  |  |  | 132,100,000 |  |  |
Commercial loans: | Credit deteriorated | First Mortgage Loan | Phoenix |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | 90,700,000 |  |  |
Specific credit loss allowance |  |  |  |  | 19,700,000 |  |  |
Commercial loans: | Credit deteriorated | Mezzanine Loans | Ireland |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | 36,500,000 |  |  |
Specific credit loss allowance |  |  |  |  | 27,600,000 |  |  |
Commercial loans: | Credit deteriorated | Senior Loans | Chicago |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 4,900,000 |  |  |
Commercial loans: | 90 days or greater past due | Non-Credit Deterioration |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of mortgage loans | loan |  |  |  |  | 3 |  |  | 3
Carrying Value |  |  |  |  | $ 628,500,000 |  |  |
Amortized cost basis not on nonaccrual |  |  |  |  | $ 269,000,000.0 |  |  |
Commercial loans: | Not 90 days or greater past due | Non-Credit Deterioration |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Number of mortgage loans | loan |  |  |  |  | 5 |  |  | 5
Carrying Value |  |  |  |  | $ 535,600,000 |  |  |
Residential | 90 days or greater past due | Non-Credit Deterioration |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |  |  |  |  |
Carrying Value |  |  |  |  | $ 72,600,000 |  |  |

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