v3.26.1
Fair Value - Level 3 Input Roll Forward, Recurring Basis (Details) - Recurring basis - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Roll forward of assets measured using Level 3 inputs on a recurring basis        
Balance at the beginning of the period $ 10,683,929 $ 9,515,452 $ 10,031,580 $ 9,212,146
Purchases and issuances, net 1,903,131 1,686,029 3,099,754 3,252,457
Capitalization of interest and advances 28,449 27,315 45,951 37,947
Sales and repayments (512,317) (537,122) (852,415) (1,051,768)
Mortgage servicing rights resulting from loan sales 648,681 814,538 1,368,267 1,464,887
Changes in fair value included in income arising from:        
Changes in instrument specific credit risk 477 38,010 341 67,629
Other factors (44,397) (174,777) (168,194) (480,337)
Total changes in fair value included in income (43,920) (136,767) (167,853) (412,708)
Transfers from Level 3 to Level 2 1,114,273 (976,806) (1,639,414) (1,888,043)
To real estate acquired in settlement of loans (585)   (1,433)  
Transfers to loans held for sale (270,877) (208,324) (562,219) (430,603)
Balance at the end of the period 11,322,218 10,184,315 11,322,218 10,184,315
Changes in fair value recognized during the period relating to assets still held at the end of the period $ (37,516) $ (79,531) $ (210,286) $ (507,322)
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) 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 period $ 1,568 $ 1,651 $ 1,572 $ 1,683
Changes in fair value included in income (46) (8) (50) (40)
Balance at the end of the period 1,522 1,643 1,522 1,643
Changes in fair value recognized during the period relating to liability still outstanding at the end of the period (46) (8) (50) (40)
Mortgage loans held for sale        
Roll forward of assets measured using Level 3 inputs on a recurring basis        
Balance at the beginning of the period 428,957 441,621 307,711 434,053
Purchases and issuances, net 1,709,010 1,513,042 2,656,566 2,896,927
Capitalization of interest and advances 28,449 27,315 45,951 37,947
Sales and repayments (505,947) (537,122) (848,551) (1,051,768)
Changes in fair value included in income arising from:        
Changes in instrument specific credit risk 477 38,010 341 67,629
Other factors 51,073 4,853 75,990 14,168
Total changes in fair value included in income 51,550 42,863 76,331 81,797
Transfers from Level 3 to Level 2 1,114,273 (976,806) (1,639,414) (1,888,043)
To real estate acquired in settlement of loans (585)   (1,433)  
Balance at the end of the period 597,161 510,913 597,161 510,913
Changes in fair value recognized during the period relating to assets still held at the end of the period 28,826 25,494 27,917 28,691
Interest rate lock commitments        
Roll forward of assets measured using Level 3 inputs on a recurring basis        
Balance at the beginning of the period 102,663 109,942 127,276 33,565
Purchases and issuances, net 203,079 172,987 457,416 355,530
Changes in fair value included in income arising from:        
Other factors 109,573 67,548 128,920 183,661
Total changes in fair value included in income 109,573 67,548 128,920 183,661
Transfers to loans held for sale (274,107) (208,324) (572,404) (430,603)
Balance at the end of the period 141,208 142,153 141,208 142,153
Changes in fair value recognized during the period relating to assets still held at the end of the period 141,208 142,153 141,208 142,153
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 period 3,273   (2,348)  
Purchases and issuances, net (8,958)   (14,228)  
Changes in fair value included in income arising from:        
Other factors (490)   3,446  
Total changes in fair value included in income (490)   3,446  
Transfers to loans held for sale 3,230   10,185  
Balance at the end of the period (2,945)   (2,945)  
Changes in fair value recognized during the period relating to assets still held at the end of the period (2,945)   (2,945)  
Mortgage servicing rights        
Roll forward of assets measured using Level 3 inputs on a recurring basis        
Balance at the beginning of the period 10,149,036 8,963,889 9,598,941 8,744,528
Sales and repayments (6,370)   (3,864)  
Mortgage servicing rights resulting from loan sales 648,681 814,538 1,368,267 1,464,887
Changes in fair value included in income arising from:        
Other factors (204,553) (247,178) (376,550) (678,166)
Total changes in fair value included in income (204,553) (247,178) (376,550) (678,166)
Balance at the end of the period 10,586,794 9,531,249 10,586,794 9,531,249
Changes in fair value recognized during the period relating to assets still held at the end of the period $ (204,605) $ (247,178) $ (376,466) $ (678,166)