v3.26.1
Fair Value - Level 3 Input Roll Forward, Recurring Basis (Details) - Recurring basis - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Roll forward of assets measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter $ 10,031,580 $ 9,212,146
Purchases and issuances, net 1,196,623 1,566,428
Capitalization of interest and advances 17,502 10,632
Sales and repayments (340,098) (514,646)
Mortgage servicing rights resulting from loan sales 719,586 650,349
Changes in fair value included in income arising from:    
Changes in instrument specific credit risk 22,201 1,986
Other factors (146,134) (277,927)
Total changes in fair value included in income (123,933) (275,941)
Transfers from Level 3 to Level 2 525,141 (911,237)
To real estate acquired in settlement of loans (848)  
Transfers to loans held for sale (291,342) (222,279)
Balance at the end of the quarter 10,683,929 9,515,452
Changes in fair value recognized during the period relating to assets still held at the end of the quarter $ (53,659) $ (297,331)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Servicing Asset at Fair Value, Period Increase (Decrease) Servicing Asset at Fair Value, Period Increase (Decrease)
Roll forward of liabilities measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter $ 1,572 $ 1,683
Changes in fair value included in income (4) (32)
Balance at the end of the quarter 1,568 1,651
Changes in fair value recognized during the period relating to liability still outstanding at the end of the quarter (4) (32)
Mortgage loans held for sale    
Roll forward of assets measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter 307,711 434,053
Purchases and issuances, net 947,556 1,383,885
Capitalization of interest and advances 17,502 10,632
Sales and repayments (342,604) (514,646)
Changes in fair value included in income arising from:    
Changes in instrument specific credit risk 22,201 1,986
Other factors 2,580 36,948
Total changes in fair value included in income 24,781 38,934
Transfers from Level 3 to Level 2 525,141 (911,237)
To real estate acquired in settlement of loans (848)  
Balance at the end of the quarter 428,957 441,621
Changes in fair value recognized during the period relating to assets still held at the end of the quarter 12,402 23,715
Interest rate lock commitments    
Roll forward of assets measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter 127,276 33,565
Purchases and issuances, net 254,337 182,543
Changes in fair value included in income arising from:    
Other factors 19,347 116,113
Total changes in fair value included in income 19,347 116,113
Transfers to loans held for sale (298,297) (222,279)
Balance at the end of the quarter 102,663 109,942
Changes in fair value recognized during the period relating to assets still held at the end of the quarter 102,663 109,942
Interest rate lock commitments | PennyMac Mortgage Investment Trust    
Roll forward of assets measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter (2,348)  
Purchases and issuances, net (5,270)  
Changes in fair value included in income arising from:    
Other factors 3,936  
Total changes in fair value included in income 3,936  
Transfers to loans held for sale 6,955  
Balance at the end of the quarter 3,273  
Changes in fair value recognized during the period relating to assets still held at the end of the quarter 3,273  
Mortgage servicing rights    
Roll forward of assets measured using Level 3 inputs on a recurring basis    
Balance at the beginning of the quarter 9,598,941 8,744,528
Sales and repayments 2,506  
Mortgage servicing rights resulting from loan sales 719,586 650,349
Changes in fair value included in income arising from:    
Other factors (171,997) (430,988)
Total changes in fair value included in income (171,997) (430,988)
Balance at the end of the quarter 10,149,036 8,963,889
Changes in fair value recognized during the period relating to assets still held at the end of the quarter $ (171,997) $ (430,988)