Transactions with Related Parties - Special Servicing - Additional Information (Detail) - PennyMac Loan Services, LLC [Member]	6 Months Ended
	Jun. 30, 2024 USD ($)
Mortgage Loans On Real Estate [Line Items]
Servicing agreement expiration date	Jun. 30, 2025
Service agreement maturity renewal term	18 months
Distressed loans [Member]
Mortgage Loans On Real Estate [Line Items]
Base servicing fees for REO per month	$ 75
Supplemental servicing fee	25
Distressed loans [Member] | Minimum [Member]
Mortgage Loans On Real Estate [Line Items]
Base servicing fees per month	30,000
Distressed loans [Member] | Maximum [Member]
Mortgage Loans On Real Estate [Line Items]
Base servicing fees per month	$ 95