v3.26.3
Derivative and Credit Risk Transfer Strip Assets and Liabilities - Summary of Derivative and Credit Risk Transfer Strip Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Credit risk transfer strip liabilities $ 5,231 $ 5,999
Total derivative and credit risk transfer strip liabilities 11,333 6,932
Nonaffiliates [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative assets 53,001 49,696
Derivative liabilities 6,102 933
Total derivative and credit risk transfer strip liabilities 11,333 6,932
Pennymac Financial Services Inc [Member]    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative assets 5,668 6,247
Derivative liabilities $ 16,456 $ 2,257