Mortgage Loans Held for Sale - Derivative Instruments Related to Mortgage Loan Activity (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash collateral receivable (payable)	$ 357	$ 720
Forward mortgage loan purchase commitments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional	277,339	83,962
Derivative Assets	435	708
Derivative Liabilities	0	0
Forward RMBS purchase contracts | Designated as Hedging Instrument
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional	238,350	51,100
Derivative Assets	20	715
Derivative Liabilities	397	817
Interest rate swap futures contracts (3) | Designated as Hedging Instrument
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Notional	22,500	7,300
Derivative Assets	499	489
Derivative Liabilities	$ 0	$ 0