v3.26.3
Transactions with Related Parties - Summary of Aggregation and Securitization Activities (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Related Party Transaction [Line Items]        
Unpaid principal balance of loans sold to PLS:   $ 5,404,888   $ 52,044,820
PennyMac Loan Services, LLC [Member]        
Related Party Transaction [Line Items]        
Loan fulfillment fees earned by PLS $ 3,206 6,162 $ 13,966 17,266
Unpaid principal balance of loans fulfilled by PLS 1,198,776 3,343,181 6,559,831 9,210,743
Sourcing fees received from PLS included in Net gains on loans held for sale   531   5,204
Purchases of loans held for sale from PLS [1] $ 3,324,262 3,983,322 $ 12,702,942 5,673,014
Tax service fees paid to PLS   558   1,537
PennyMac Loan Services, LLC [Member] | Government Guaranteed Or Insured [Member]        
Related Party Transaction [Line Items]        
Unpaid principal balance of loans sold to PLS:   3,081,974   27,060,094
PennyMac Loan Services, LLC [Member] | Conventional Conforming [Member]        
Related Party Transaction [Line Items]        
Unpaid principal balance of loans sold to PLS:   $ 2,322,914   $ 24,984,726
[1] Amount includes loans purchased from PLS subject to the fulfillment agreement as well as other loans purchased from PLS.