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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Related Party Transaction [Line Items]        
Loan servicing fees $ 19,640 $ 21,645 $ 39,363 $ 43,374
Average MSR portfolio unpaid principal balance 210,239,293 222,991,951 212,214,382 224,208,538
Mortgage servicing rights recapture fees 4,857 1,474 10,664 2,682
Unpaid principal balance of loans recaptured 481,158 183,050 1,032,156 342,522
Loans held for sale [Member]        
Related Party Transaction [Line Items]        
Loan servicing fees 145 285 300 508
Average investment in loans acquired for sale at fair value 2,666,049 2,204,825 2,640,993 2,101,729
Loans held for investment [Member]        
Related Party Transaction [Line Items]        
Loan servicing fees 1,118 226 1,634 394
Loans at fair value 11,633,874 3,766,027 10,670,256 3,199,308
Mortgage servicing rights [Member]        
Related Party Transaction [Line Items]        
Loan servicing fees $ 18,377 $ 21,134 $ 37,429 $ 42,472