Investments in MSR Financing Receivables - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended	36 Months Ended	39 Months Ended
	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2023	Apr. 01, 2024	Jun. 30, 2022	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
MSR servicing fee basis points	0.125%
Servicing advances receivable	$ 2,244	$ 3,731
Counterparty financing secured by financing receivable	27,863	40,398
MSR financing receivables, at fair value	164,585	$ 125,018			$ 120,260	$ 112,834	$ 74,652	$ 9,346
Scenario, Forecast
Accounts Notes And Loans Receivable [Line Items]
Minimum amount of capital commitment for investments to counterparty period of expiration			Dec. 31, 2023	Apr. 01, 2024
Minimum
Accounts Notes And Loans Receivable [Line Items]
Minimum amount of capital commitment for investments to counterparty	$ 50,000
Minimum | Scenario, Forecast
Accounts Notes And Loans Receivable [Line Items]
Minimum amount of capital commitment for investments to counterparty			$ 25,000	$ 25,000