Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - CECL Allowance as Percentage of Amortized Cost and Total Commitment (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Allowance and Provision for Loan Credit Loss [Abstract] | ||||||||||||||||||||||||||
| Beginning balance, Specific CECL Allowance | $ 38,754 | $ 38,754 | ||||||||||||||||||||||||
| Write-offs, specific CECL allowance, funded | [1] | $ (6,200) | ||||||||||||||||||||||||
| Ending balance, Specific CECL Allowance | 38,754 | |||||||||||||||||||||||||
| Financing Receivable, Funded, Allowance for Credit Loss [Roll Forward] | ||||||||||||||||||||||||||
| Beginning balance, General CECL Allowance, Funded | $ 37,498 | 38,754 | $ 34,712 | $ 30,836 | 38,754 | 30,836 | ||||||||||||||||||||
| Allowances (Reversals), net | (37,498) | (1,256) | [2] | 4,136 | [3] | 3,876 | [4] | |||||||||||||||||||
| Quarter writeoff, General CECL allowance, funded | 0 | |||||||||||||||||||||||||
| Ending balance, General CECL Allowance, Funded | 0 | 37,498 | 38,848 | 34,712 | 0 | 38,754 | ||||||||||||||||||||
| Financing Receivable, Unfunded, Allowance for Credit Loss [Roll Forward] | ||||||||||||||||||||||||||
| Beginning balance, General CECL Allowance, Unfunded | 3,726 | 5,759 | 6,080 | 5,948 | 5,759 | 5,948 | ||||||||||||||||||||
| Allowances (Reversals), net | (3,726) | (2,033) | [2] | (1,023) | [3] | 132 | [4] | |||||||||||||||||||
| Quarter writeoff, General CECL allowance, unfunded | 0 | |||||||||||||||||||||||||
| Ending balance, General CECL Allowance, Unfunded | 0 | 3,726 | 5,057 | 6,080 | 0 | 5,759 | ||||||||||||||||||||
| Financing Receivable, General Allowance, Allowance for Credit Loss [Roll Forward] | ||||||||||||||||||||||||||
| Beginning balance, General CECL Allowance | 41,224 | 44,513 | 40,792 | 36,784 | 44,513 | 36,784 | ||||||||||||||||||||
| Allowances (Reversals), net | (41,224) | (3,289) | [2] | 3,113 | [3] | 4,008 | [4] | |||||||||||||||||||
| General CECL Allowance writeoff | 0 | |||||||||||||||||||||||||
| Ending balance,General CECL Allowance | 0 | 41,224 | 43,905 | 40,792 | 0 | 44,513 | ||||||||||||||||||||
| Financing Receivable, Total Allowance for Credit Loss [Roll Forward] | ||||||||||||||||||||||||||
| Beginning balance, Total CECL Allowance | 379,224 | 382,513 | 383,292 | 379,284 | 382,513 | 379,284 | ||||||||||||||||||||
| Allowances (Reversals), net | (42,688) | (3,289) | [2] | 3,113 | [3] | 4,008 | [4] | |||||||||||||||||||
| Total CECL Allowance, writeoff | (336,536) | |||||||||||||||||||||||||
| Ending balance, Total CECL Allowance | $ 0 | $ 379,224 | $ 386,405 | $ 383,292 | $ 0 | $ 382,513 | ||||||||||||||||||||
| General CECL allowance, % of amortized cost | 0.00% | [5] | 0.47% | [5] | 4.29% | 4.75% | 0.00% | [5] | 0.51% | [5] | 5.07% | |||||||||||||||
| Total CECL allowance, % of amortized cost | 0.00% | 4.10% | 0.51% | [6] | 0.54% | [6] | 0.00% | 4.18% | 0.52% | [6] | ||||||||||||||||
| Commercial Mortgage and Subordinated Portfolio Segment | ||||||||||||||||||||||||||
| Allowance and Provision for Loan Credit Loss [Abstract] | ||||||||||||||||||||||||||
| Beginning balance, Specific CECL Allowance | $ 338,000 | [5] | $ 338,000 | [5] | $ 342,500 | [6] | $ 342,500 | [6] | $ 338,000 | [5] | $ 342,500 | [6] | ||||||||||||||
| Allowances (Reversals), net | 1,464 | [5] | 0 | [2],[5] | 0 | [3],[6] | 0 | [4],[6] | ||||||||||||||||||
| Write-offs, specific CECL allowance, funded | (336,536) | [5] | (335,000) | |||||||||||||||||||||||
| Ending balance, Specific CECL Allowance | $ 0 | [5] | $ 338,000 | [5] | $ 342,500 | [6] | $ 342,500 | [6] | $ 0 | [5] | $ 338,000 | [5] | ||||||||||||||
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