CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 221,037	$ 162,441
Loan origination fees	46,611	36,371
Fulfillment fees from PennyMac Mortgage Investment Trust	5,290	4,016
Loan servicing fees:
Servicing fees	488,468	424,184
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(430,956)	(28,585)
Mortgage servicing rights hedging results	106,774	(294,645)
Change in fair value of mortgage servicing rights and mortgage-backed securities	(324,182)	(323,230)
Net loan servicing fees	164,286	100,954
Management fees from PennyMac Mortgage Investment Trust	7,012	7,188
Net interest expense:
Interest income	189,871	156,426
Interest expense	208,082	165,769
Net interest expense	(18,211)	(9,343)
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	185	10
Results of real estate acquired in settlement of loans	(225)	406
Other	4,918	3,617
Total net revenues	430,903	305,660
Expenses
Compensation	181,988	146,376
Loan origination	44,096	30,568
Technology	40,197	35,967
Servicing	21,875	16,104
Marketing and advertising	9,432	3,671
Professional services	9,037	9,262
Occupancy and equipment	8,382	8,676
Other	11,700	11,153
Total expenses	326,707	261,777
Income before provision for income taxes	104,196	43,883
Provision for income taxes	27,916	4,575
Net income	$ 76,280	$ 39,308
Earnings per share
Basic (in dollars per share)	$ 1.48	$ 0.78
Diluted (in dollars per share)	$ 1.42	$ 0.74
Weighted-average shares outstanding
Basic (in shares)	51,506	50,547
Diluted (in shares)	53,624	53,100
Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 4,838	$ (353)
Loan origination fees	477	359
Nonrelated Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	216,199	162,794
Loan origination fees	46,134	36,012
Net interest expense:
Interest expense	208,082	165,769
Non-affiliates | Nonrelated Party
Loan servicing fees:
Servicing fees	417,687	358,026
PennyMac Mortgage Investment Trust | Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	4,838	(353)
Loan servicing fees:
Servicing fees	21,729	20,262
Net interest expense:
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	185	10
Others | Nonrelated Party
Loan servicing fees:
Servicing fees	$ 49,052	$ 45,896