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Repurchase Agreements - Narrative (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) counterparty	Dec. 31, 2023 USD ($) counterparty	Mar. 31, 2023 USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Cash and cash equivalents	$ 226,939	$ 187,107	$ 227,753
Securities borrowed	$ 151,073
Number of counterparties with amounts outstanding under repurchase agreements | counterparty	7	7
Repurchase agreements, number of counterparties | counterparty	2
Financings under repurchase agreements, aggregate outstanding balance	$ 353,100
Accrued interest payable	$ 16,800	$ 13,600
Weighted average advance rate	93.70%	93.40%
Average interest rate haircut	6.30%	6.60%
Average days to maturity	40 days	46 days
Weighted average interest rate	5.55%	5.66%
Interest rate caps
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreements, number of counterparties | counterparty	1
Residential loans
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 186,800
Number of counterparties with amounts outstanding under repurchase agreements | counterparty	5
Residential Loans, Real Estate Owned and Single-Family Rental Properties
Assets Sold under Agreements to Repurchase [Line Items]
Accrued interest payable	$ 2,900	$ 3,700
Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 85,101
Average interest rate haircut	4.70%
Non-Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 65,972
Average interest rate haircut	56.50%
Repurchase agreements
Assets Sold under Agreements to Repurchase [Line Items]
Cash and cash equivalents	$ 212,600
Securities borrowed	$ 151,100
Atlas SP
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreement percentage at risk	6.39%
Bank of America
Assets Sold under Agreements to Repurchase [Line Items]
Repurchase agreement percentage at risk	5.02%

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Number of counterparties the entity has repurchase agreements with.

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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.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Weighted average maturity (weighted by amount of the agreement) of repurchase agreements with the counterparty, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after the effects of master netting arrangements, of securities borrowed from entities in exchange for collateral. Includes assets not subject to a master netting arrangement and not elected to be offset.

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