v3.26.1
Related Party Transactions - Management Fees (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 01, 2025
Sep. 12, 2016
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Management fees, net:            
Management fees     $ 6,810,000 $ 6,869,000 $ 13,572,000 $ 13,881,000
Related Party | Management Fees | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of change in net income due to quarterly adjustments   8.00%        
Management fees, net:            
Base management fees     6,810,000 6,869,000 13,572,000 13,881,000
Management fees     6,810,000 6,869,000 13,572,000 13,881,000
Average PMT's shareholders' equity used to calculate base management fees     $ 1,820,944,000 $ 1,836,690,000 $ 1,824,591,000 $ 1,866,238,000
Related Party | Management Fees | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of performance incentive fee payable by issuance of common shares   50.00%        
Related Party | Management Fees | Minimum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
High watermark   $ 0        
Related Party | Shareholders Equity Up To 2 Billion Dollars | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee annual rate (as a percent) 1.50%          
Base management fee shareholders' equity limit $ 2,000,000,000          
Related Party | Shareholders Equity In Excess Of 2 Billion Dollars And Upto 5 Billion Dollars | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee annual rate (as a percent) 1.375%          
Related Party | Shareholders Equity In Excess Of 2 Billion Dollars And Upto 5 Billion Dollars | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee shareholders' equity limit $ 5,000,000,000          
Related Party | Shareholders Equity In Excess Of 2 Billion Dollars And Upto 5 Billion Dollars | Minimum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee shareholders' equity limit $ 2,000,000,000          
Related Party | Shareholders Equity In Excess Of 5 Billion Dollars | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee annual rate (as a percent) 1.25%          
Related Party | Shareholders Equity In Excess Of 5 Billion Dollars | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Base management fee shareholders' equity limit $ 5,000,000,000          
Related Party | Return on Shareholders Equity 8 Percent | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of net income for calculation of performance incentive fees   10.00%        
Related Party | Return on Shareholders Equity 8 Percent | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of return on affiliate's equity   8.00%        
Related Party | Return on Shareholders Equity 8 Percent | Minimum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of return on affiliate's equity   12.00%        
Related Party | Return on Shareholders Equity 12 Percent | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of net income for calculation of performance incentive fees   15.00%        
Related Party | Return on Shareholders Equity 12 Percent | Maximum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of return on affiliate's equity   16.00%        
Related Party | Return on Shareholders Equity 12 Percent | Minimum | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of return on affiliate's equity   12.00%        
Related Party | Return on Shareholders Equity in Excess of 16 Percent | PennyMac Mortgage Investment Trust            
Transactions with Affiliates            
Percentage of net income for calculation of performance incentive fees   20.00%        
Percentage of return on affiliate's equity   16.00%