Mortgage-Backed Securities - Significant Credit Quality Indicators (Details) $ in Thousands	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 1,678,825	$ 1,553,455
Non-Agency RMBS - Senior
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	474,229	481,132
Non-Agency RMBS - Senior | Credit Quality Indicator, Updated Quarterly
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 137,357	$ 130,669
Non-Agency RMBS - Senior | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | Prepay Rate
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.068	0.075
Non-Agency RMBS - Senior | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | CDR
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.016	0.018
Non-Agency RMBS - Senior | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | Loss Severity
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.326	0.326
Non-Agency RMBS - Subordinated
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 385,319	$ 387,000
Non-Agency RMBS - Subordinated | Credit Quality Indicator, Updated Quarterly
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 58,318	$ 58,914
Non-Agency RMBS - Subordinated | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | Prepay Rate
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.062	0.062
Non-Agency RMBS - Subordinated | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | CDR
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.003	0.003
Non-Agency RMBS - Subordinated | Credit Quality Indicator, Updated Quarterly | Weighted Average Borrowing Rates | Loss Severity
Debt Securities, Available-for-sale [Line Items]
Significant Inputs	0.445	0.445