v3.25.2
Loans Acquired for Sale at Fair Value - Summary of Distribution of Company's Loans Acquired for Sale at Fair Value (Detail) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value $ 2,616,251 $ 2,116,318
Loans pledged to secure total 2,584,143 2,087,615
Loans acquired for sale at fair value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans pledged to secure Assets sold under agreements to repurchase 2,575,290 2,075,473
PennyMac Loan Services, LLC [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value 1,584,212 602,108
Mortgage Loans Acquired for Sale [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans pledged to secure mortgage loan participation purchase and sale agreements 8,853 12,142
Held for sale to PLS - GSE Eligible [Member] | PennyMac Loan Services, LLC [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value [1] 1,079,994 175,145
Held for Sale to PLS - Government-Insured or Guaranteed [Member] | PennyMac Loan Services, LLC [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value 504,218 426,963
Held for Sale to Nonaffiliates-GSE Eligible [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value 819,578 1,311,754
Jumbo [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value 205,296 194,485
Home Equity Lines of Credit [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value 1,048 1,368
Repurchased Pursuant to Representations and Warranties [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Loans acquired for sale at fair value $ 6,117 $ 6,603
[1] GSE eligibility refers to the eligibility of loans for sale to Fannie Mae or Freddie Mac. The Company sells or finances a portion of its GSE eligible loan production to or with other investors, including PLS.