v3.26.1
Transactions with Related Parties - Summary of Loan Servicing Fees Earned and Mortgage Servicing Rights Recaptured Income Earned (Detail) - PennyMac Loan Services, LLC [Member] - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Related Party Transaction [Line Items]    
Loan servicing fees $ 19,723 $ 21,729
Average MSR portfolio unpaid principal balance 214,185,523 225,515,018
Mortgage servicing rights recapture fees 5,807 1,208
Unpaid principal balance of loans recaptured 550,998 159,472
Loans held for sale [Member]    
Related Party Transaction [Line Items]    
Loan servicing fees 155 223
Average investment in loans acquired for sale at fair value 2,615,661 1,997,488
Loans held for investment [Member]    
Related Party Transaction [Line Items]    
Loan servicing fees 516 168
Loans at fair value 9,695,900 2,626,335
Mortgage servicing rights [Member]    
Related Party Transaction [Line Items]    
Loan servicing fees $ 19,052 $ 21,338