Mortgage-Backed Securities - Collateral Characteristics of Non-Agency Residential MBS (Details) - Non-Agency RMBS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Weighted average maturity (years)	17 years 3 months 18 days	17 years 6 months
Weighted average amortized loan to value	55.70%	56.10%
Weighted average FICO	706	706
Weighted average loan balance (in thousands)	$ 245	$ 247
Weighted average percentage owner-occupied	67.70%	67.60%
Weighted average percentage single family residence	60.30%	60.30%
Weighted average current credit enhancement	1.30%	1.30%
CA
Debt Securities, Available-for-sale [Line Items]
Weighted average geographic concentration of top four states	32.90%	32.90%
NY
Debt Securities, Available-for-sale [Line Items]
Weighted average geographic concentration of top four states	11.90%	11.80%
FL
Debt Securities, Available-for-sale [Line Items]
Weighted average geographic concentration of top four states	7.60%	7.60%
NJ
Debt Securities, Available-for-sale [Line Items]
Weighted average geographic concentration of top four states	4.70%	4.60%