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Repurchase Agreements and Warehouse Facilities - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) counterparty	Dec. 31, 2024 USD ($) counterparty	Sep. 30, 2024 USD ($)
Assets Sold under Agreements to Repurchase [Line Items]
Cash and cash equivalents	$ 185,285	$ 167,422	$ 195,066
Securities borrowed	$ 459,633
Number of counterparties with amounts outstanding under repurchase agreements | counterparty	12	9
Accrued interest payable	$ 39,500	$ 28,400
Weighted average advance rate	96.40%	96.00%
Average interest rate haircut	3.60%	4.00%
Average days to maturity	41 days	26 days
Weighted average interest rate	4.43%	4.84%
Total Residential loans
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 57,700
Number of counterparties with amounts outstanding under repurchase agreements | counterparty	8
Residential Loans, Real Estate Owned, Single-Family Rental Properties and Warehouse Facilities
Assets Sold under Agreements to Repurchase [Line Items]
Accrued interest payable	$ 2,800	$ 2,500
Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 423,418
Average interest rate haircut	3.60%
Non-Agency RMBS
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 34,417
Average interest rate haircut	34.50%
U.S. Treasury securities
Assets Sold under Agreements to Repurchase [Line Items]
Securities borrowed	$ 1,798
Average interest rate haircut	1.70%
Repurchase Agreements
Assets Sold under Agreements to Repurchase [Line Items]
Cash and cash equivalents	$ 180,900
Securities borrowed	$ 459,600

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