Principal-Only Stripped Mortgage-Backed Securities - Activity in the Company's investment in principal-only stripped MBS (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Mortgage-backed securities | ||
| Balance at beginning of quarter | $ 722,528 | |
| Balance at end of quarter | 659,235 | |
| Principal-Only-Strip MBS | ||
| Mortgage-backed securities | ||
| Balance at beginning of quarter | 722,528 | $ 825,865 |
| Repayments | (58,069) | (37,738) |
| Amortization of purchase discounts | (5,185) | 11,335 |
| Valuation adjustments | (39) | 18,134 |
| Total | 5,224 | (29,469) |
| Balance at end of quarter | $ 659,235 | $ 817,596 |