Investment in Loans Investment in Loans (Schedule of Residential Mortgage Loans: Performance) (Details) - USD ($) $ in Thousands |
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 | |||
| Residential mortgage loans | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | 3,863,111 | 3,739,813 | ||||
| Loans, at fair value(1)(2) | 3,748,165 | 3,643,094 | ||||
| Residential mortgage loans | Performing Financial Instruments [Member] | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | 21,710 | 23,062 | ||||
| Loans, at fair value(1)(2) | 20,555 | 22,148 | ||||
| Residential mortgage loans | Non-performing | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||
| Unpaid Principal Balance | 234,620 | 266,485 | ||||
| Loans, at fair value(1)(2) | $ 212,807 | $ 246,586 | ||||
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