Mortgage-Backed Securities - Collateral Characteristics of Non-Agency Residential MBS (Details) - Non-Agency RMBS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investment Holdings [Line Items]
Weighted average maturity (years)	20 years 1 month 6 days	21 years 4 months 24 days
Weighted average amortized loan to value	59.30%	60.30%
Weighted average FICO	713	706
Weighted average loan balance (in thousands)	$ 262	$ 259
Weighted average percentage owner-occupied	83.70%	84.00%
Weighted average percentage single family residence	61.40%	62.70%
Weighted average current credit enhancement	1.00%	1.20%
CA
Investment Holdings [Line Items]
Weighted average geographic concentration of top four states	32.30%	31.20%
NY
Investment Holdings [Line Items]
Weighted average geographic concentration of top four states	10.70%	10.40%
FL
Investment Holdings [Line Items]
Weighted average geographic concentration of top four states	8.00%	8.00%
NJ
Investment Holdings [Line Items]
Weighted average geographic concentration of top four states	4.60%	4.60%

The weighted average maturity period of underlying mortgages, which is based on their current face amounts.

No definition available.

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages at amortized cost to their fair values determined using defined pricing methodologies.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average credit score of underlying mortgages based on their FICO ratings.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the percentage of unpaid principal amount of underlying mortgages originated in a specified territory.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of unpaid principal amounts of underlying mortgages.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages that are additionally secured in whole or in part with credit enhancements provided by third parties.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages that are owner occupied.

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the weighted average of underlying mortgages that are single family residences.

+ References

No definition available.

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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