Loan Portfolio - Schedule of Loan Receivable Held-for-Investment Portfolio (Details) $ in Thousands |
9 Months Ended | 12 Months Ended | ||||||||||||||||||||||
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Sep. 30, 2026
USD ($)
Loan
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Dec. 31, 2025
USD ($)
Loan
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| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | $ 3,226,199 | [1] | $ 4,329,235 | [2] | ||||||||||||||||||||
| Unpaid Principal Balance | 3,055,182 | 4,057,357 | ||||||||||||||||||||||
| Loans receivable held-for-investment | $ 2,539,431 | [3] | $ 3,688,729 | [4] | ||||||||||||||||||||
| Number of Loans | Loan | 23 | 33 | ||||||||||||||||||||||
| Weighted Average Spread | 0 | 0 | ||||||||||||||||||||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | ||||||||||||||||||||||
| Weighted Average Interest Rate | 4.59% | [5] | 5.55% | [6] | ||||||||||||||||||||
| General CECL reserve | $ (48,808) | [3] | $ (73,328) | [4] | ||||||||||||||||||||
| Loans receivable held-for-investment, net | 2,490,623 | [3] | 3,615,401 | [4] | ||||||||||||||||||||
| Variable Senior Loans | ||||||||||||||||||||||||
| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | 3,099,672 | [1],[7] | 4,202,628 | [2],[8] | ||||||||||||||||||||
| Unpaid Principal Balance | 2,928,655 | [7] | 3,930,750 | [8] | ||||||||||||||||||||
| Loans receivable held-for-investment | $ 2,412,919 | [3],[7] | $ 3,562,183 | [4],[8] | ||||||||||||||||||||
| Number of Loans | Loan | 21 | [7] | 31 | [8] | ||||||||||||||||||||
| Weighted Average Spread | + 2.58% | [7],[9] | + 3.17% | [8],[10] | ||||||||||||||||||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | ||||||||||||||||||||||
| Weighted Average Interest Rate | 4.43% | [5],[7] | 5.46% | [6],[8] | ||||||||||||||||||||
| Variable Loan | ||||||||||||||||||||||||
| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | $ 3,099,672 | [1] | $ 4,202,628 | [2] | ||||||||||||||||||||
| Unpaid Principal Balance | 2,928,655 | 3,930,750 | ||||||||||||||||||||||
| Loans receivable held-for-investment | $ 2,412,919 | [3] | $ 3,562,183 | [4] | ||||||||||||||||||||
| Number of Loans | Loan | 21 | 31 | ||||||||||||||||||||||
| Weighted Average Spread | + 2.58% | [9] | + 3.17% | [10] | ||||||||||||||||||||
| Investment, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] | ||||||||||||||||||||||
| Weighted Average Interest Rate | 4.43% | [5] | 5.46% | [6] | ||||||||||||||||||||
| Fixed Senior Loans | ||||||||||||||||||||||||
| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | $ 1,527 | [1],[7] | $ 1,607 | [2],[8] | ||||||||||||||||||||
| Unpaid Principal Balance | 1,527 | [7] | 1,607 | [8] | ||||||||||||||||||||
| Loans receivable held-for-investment | $ 1,527 | [3],[7] | $ 1,607 | [4],[8] | ||||||||||||||||||||
| Number of Loans | Loan | 1 | [7] | 1 | [8] | ||||||||||||||||||||
| Weighted Average Interest Rate | 0.00% | [5],[7] | 0.00% | [6],[8] | ||||||||||||||||||||
| Fixed Subordinate Loans | ||||||||||||||||||||||||
| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | $ 125,000 | [1] | $ 125,000 | [2] | ||||||||||||||||||||
| Unpaid Principal Balance | 125,000 | 125,000 | ||||||||||||||||||||||
| Loans receivable held-for-investment | $ 124,985 | [3] | $ 124,939 | [4] | ||||||||||||||||||||
| Number of Loans | Loan | 1 | 1 | ||||||||||||||||||||||
| Weighted Average Interest Rate | 8.50% | [5] | 8.50% | [6] | ||||||||||||||||||||
| Fixed Loan | ||||||||||||||||||||||||
| Schedule Of Loans Receivables Past Due [Line Items] | ||||||||||||||||||||||||
| Loan Commitment | $ 126,527 | [1] | $ 126,607 | [2] | ||||||||||||||||||||
| Unpaid Principal Balance | 126,527 | 126,607 | ||||||||||||||||||||||
| Loans receivable held-for-investment | $ 126,512 | [3] | $ 126,546 | [4] | ||||||||||||||||||||
| Number of Loans | Loan | 2 | 2 | ||||||||||||||||||||||
| Weighted Average Interest Rate | 8.40% | [5] | 8.39% | [6] | ||||||||||||||||||||
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