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Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
TBA securities |  | $ 4,138 |  | $ 54,361
TBA securities |  | 3,662 |  | 0
Long position | TBA securities |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
TBA securities |  | 4,138 |  | 54,361
TBA securities |  | 3,662 |  | 0
Fair Value, Measurements, Recurring | Level 1 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
MBS |  | 0 |  | 0
Mortgage loans |  | 0 |  | 0
Total assets |  | 0 |  | 0
Total liabilities |  | 0 |  | 0
Fair Value, Measurements, Recurring | Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
MBS |  |  |  | 6,038,845
Mortgage loans |  | 0 |  | 0
Total assets |  | 7,331,781 |  | 6,093,206
Total liabilities |  | 3,662 |  | 0
Fair Value, Measurements, Recurring | Level 3 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
MBS |  | 0 |  | 103
Mortgage loans |  | 1,217 |  | 1,793
Total assets |  | 1,217 |  | 1,896
Total liabilities |  | 0 |  | 0
Fair Value, Measurements, Recurring | TBA securities | Level 1 | Long position |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
TBA securities |  | 0 |  | 0
TBA securities |  | 0 |  | 0
Fair Value, Measurements, Recurring | TBA securities | Level 2 |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
MBS |  | 7,327,643 |  |
Fair Value, Measurements, Recurring | TBA securities | Level 2 | Long position |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
TBA securities | [1] | 4,138 |  | 54,361
TBA securities |  | 3,662 | [1] | 0
Fair Value, Measurements, Recurring | TBA securities | Level 3 | Long position |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
TBA securities |  | 0 |  | 0
TBA securities |  | $ 0 |  | $ 0
[1] | TBA securities are reflected on consolidated balance sheets at their implied fair value, net of implied cost basis. Please refer to Note 5 for additional information.

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