Investment in Loans Investment in Loans (Schedule of Corporate Loans) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | $ 16,647,345 | $ 16,000,731 | ||||
| Loans, at fair value(1)(2) | [1],[2] | 17,393,161 | 16,640,647 | |||
| Unamortized Premium (Discount) | (252,107) | (245,735) | ||||
| Corporate loan [Member] | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | 32,138 | 25,767 | ||||
| Loans, at fair value(1)(2) | 31,479 | 25,366 | ||||
| Unamortized Premium (Discount) | (1,012) | (912) | ||||
| Investments, at fair value, Cost | 31,126 | 24,855 | ||||
| Gains | 544 | 511 | ||||
| Losses | (191) | 0 | ||||
| Consumer loans | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | 154 | 190 | ||||
| Loans, at fair value(1)(2) | 135 | 159 | ||||
| Unamortized Premium (Discount) | 163 | 148 | ||||
| Investments, at fair value, Cost | 317 | 338 | ||||
| Gains | 22 | 36 | ||||
| Losses | $ (204) | $ (215) | ||||
| Weighted Average | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Weighted Average Coupon | 5.05% | 5.21% | ||||
| Weighted average life | 5 years 18 days | 5 years 3 months 10 days | ||||
| Weighted Average | Corporate loan [Member] | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Weighted Average Coupon | 8.45% | 11.31% | ||||
| Weighted average life | 1 year 1 month 24 days | 2 years 3 months 25 days | ||||
| Weighted Average | Consumer loans | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Weighted average life | 10 months 20 days | 10 months 20 days | ||||
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