Commitments and Contingencies - Residential Transition Loan Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Payable for purchase of unsettled Agency MBS	$ 132,026	$ 0
Transitional loans
Other Commitments [Line Items]
Other commitment	553,400
Agency MBS
Other Commitments [Line Items]
Other commitment	$ 132,000

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant